WorldWideScience

Sample records for impact des mines

  1. Economic impact of world mining

    International Nuclear Information System (INIS)

    Walser, G.

    2002-01-01

    Mining plays a vital role in the economic development of many countries. The emerging economies are now major players in the production and availability of key commodities such as copper (70%), bauxite (40%), iron ore and precious metals. Mining also has a positive impact on the economy of many countries. Another impact of mining can be measured in terms of employment opportunities and income generation. Commercial scale mining provides employment and skills transfer to more than 2 million workers. The multiplier effect increases this benefit by a factor of between 2 and 5. The World Bank Mining Department has carried out an in-depth study on economic and social impact of mining at the community level in Chile, Peru, Bolivia, Papua New Guinea and Mali. This study demonstrates that there are substantial social and economic benefits to the community. The most positive cases are related to the growth of local small- and micro-enterprise activities. However, mining remains controversial, as true sustainable development is not only a matter of financial flows. Mining has also been associated with a number of economic and social problems. As a result there are questions about the sustainability of the economic outcome of mining. The contribution of mining to sustainable development needs to be considered in terms of economic and technical viability, ecological sustainability and social equity. To achieve this, governments, mining companies and local communities must work together to address these issues. (author)

  2. Recovery of uranium in mine waters; Recuperation de l'uranium dans les eaux des mines

    Energy Technology Data Exchange (ETDEWEB)

    Sugier, P [Direction des Productions, CEA, Chatillon-Sur-Bagneux (France)

    1967-06-15

    In a brief introductory survey the author indicates the date on which leaching was first observed in the CEA mines and lists the main factors necessary for, or favourable to, the solubilization of uranium in mines. Information is given on the various sources of this type at present identified in France and the methods used to recover uranium in mines situated near ore-concentration plants. An explanation is given for the use of the calcium precipitation technique in connection with waters produced in mines not situated near ore-concentration plants. Data are given on the results of laboratory tests carried out on waters containing uranium, together with a description of an industrial-scale facility built in consequence of these tests. Details are given of the statistical results obtained. The author concludes by outlining the programme which will be implemented in the near future with a view to increasing the tonnage of uranium produced by in situ leaching and indicates that the CEA engineers are very optimistic about the prospects of this new low-cost method of producing uranium. (author) [French] Apres un bref rappel historique precisant la date de constatation du phenomene de lixiviation dans les mines d'uranium du Commissariat et un rapide inventaire des principales conditions necessaires ou favorisant la solubilisation de l'uranium dans les mines, auteur indique les differentes sources actuellement reconnues en France et les methodes utilisees pour recuperer l'uranium dans les mines situees pres d'une usine de concentration des minerais. Il donne ensuite les raisons motivant le choix du procede de precipitation calcique pour les eaux produites dans des mines eloignees des usines de concentration des minerais. Les resultats d'essais de laboratoire effectues sur des eaux chargees en uranium sont donnes et l'installation industrielle realisee a la suite de ces essais est decrite; les resultats statistiques obtenus sont detailles. En conclusion de son expose, l

  3. Minimizing the Impact of Mining Activities for Sustainable Mined-Out ...

    African Journals Online (AJOL)

    Minimizing the Impact of Mining Activities for Sustainable Mined-Out Area ... sensing and Geographical Information System (GIS) in assessing environmental impact of ... Keywords: Solid mineral, Impact assessment, Mined-out area utilization, ...

  4. Impacts of Canada's uranium mining industry

    International Nuclear Information System (INIS)

    Holman, G.J.

    1982-05-01

    This study examines economic and environmental impacts of uranium mining in Canada and compares these impacts with those of other extractive and energy industries. The uranium industry generates taxes and royalties, income, employment, foreign exchange earnings, security of energy supply, and technological spinoffs. The indirect impacts of the industry as measured by employment and income multipliers are lower than those for other types of mining and comparable to oil and gas because of the high proportion of costs withdrawn from the economy in the form of taxes and operator margin. Social costs are primarily occupational hazards. Uranium mining probably has a lower non-health environmental impact than other mining industries due to much smaller throughputs and transportation requirements. Residents of the area surrounding the mine bear a disproportionate share of the social costs, while non-residents receive most of the benefits

  5. Environmental impact of uranium mining and milling

    International Nuclear Information System (INIS)

    Dory, A.B.

    1981-08-01

    The author introduces the subject with an overview of the regulatory requirments and philosophy applied to uranium mines and mills. The special attention given to tailings management is highlighted, and a discussion of the basic environmental concerns is concluded with an itemizing of the main tasks facing the AECB. The extent of the environmental impact of uranium mining, milling and waste management is illustrated with specific details pertaining to mines in the Elliot Lake area. The author concludes that the impact on the ground and surface water system is not alarming, and the impact on air quality is not significant beyond a few hundred metres from the mining facilities. The publicly perceived impact is discussed, followed by a rationale for the continued licensing of new uranium mining operations complete with tailings management facilities

  6. Uranium mining: Environmental and health impacts

    International Nuclear Information System (INIS)

    Vance, Robert

    2014-01-01

    Producing uranium in a safe and environmentally responsible manner is important not only to the producers and consumers of the product, but also to society at large. Given expectations of growth in nuclear generating capacity in the coming decades - particularly in the developing world - enhancing awareness of leading practice in uranium mining is important. This was the objective of a recent NEA report entitled Managing Environmental and Health Impacts of Uranium Mining, providing a non-technical overview of the significant evolution of uranium mining practices from the time that it was first mined for military purposes until today. (author)

  7. Environmental impacts of mining: monitoring, restoration and control

    Energy Technology Data Exchange (ETDEWEB)

    Sengupta, M.

    1993-01-01

    Contains 12 chapters with the following titles: mining and the environment; surface coal mining with reclamation; reclamation and revegetation of mined land; the acid mine drainage problem from coal mines; acid rock drainage and metal migration; hydrologic impact; erosion and sediment control; wetlands; blasting; mining subsidence; postmining land use; environmental effects of gold heap-leaching operations.

  8. Seasonal impact of quarry mining effluent discharge impacted soils ...

    African Journals Online (AJOL)

    This study was designed to assess the impact quarry mining effluent discharge impacted soil on growth parameters and phytochemical constituents of edible vegetables. Three quarry mining sites were used for the study that covered wet and dry seasons. Plant growth such as plant height, leaf area, internodes and plant ...

  9. Final environmental impact statement. Marquez uranium mine

    International Nuclear Information System (INIS)

    1984-01-01

    As one of many activities TVA has undertaken to ensure an adequate supply of uranium for these plants, TVA has proposed to underground mine, through its operator, the uranium deposits located in the Canon de Marquez in McKinley County, New Mexico. Construction and operation of the underground mine would be expected to have the following environmental effects: (a) a temporary change in land use for 48.5 hectares from wildlife habitat and recreation to mineral extraction; (b) a minor alteration in topography near the proposed pond sites due to reclamation of waste rock piles; (c) minimal impacts on land due to limited vehicular traffic and road construction; (d) temporary depression of ground water levels in the Westwater Canyon Member of the Morrison Formation in the mine vicinity during mine life; (e) short-term project-induced impacts to surface water and shallow ground water quality; (f) a temporary decrease in air quality in the vicinity of the mining operations due to fugitive dust and exhaust emissions from combustion-driven mining and support vehicles and releases of radon and short-lived radon progeny from ventilation shafts and ore piles; (g) a temporary decrease of plant and animal species at the mine site; (h) a minor and temporary effect on aquatic systems downstream from the mine and settling ponds due to sedimentation; and (i) a minor increase of noise levels in the immediate vicinity of mine shafts and vents. The no action alternative and alternatives for securing uranium ore by other methods were considered but were found insufficient to meet TVA objectives. None of the alternatives explored were environmentally preferable. TVA also evaluated site specific alternatives including the following: different shaft and support building siting, mining techniques, and reclamation options. 25 figures, 20 tables

  10. Environmental impact of uranium mining and milling

    International Nuclear Information System (INIS)

    Dory, A.B.

    1981-08-01

    The Atomic Energy Control Board is now involved from the early planning stages in the development of uranium mine/mill facilities. As a result, new facilities (including tailings management areas) are designed and developed to meet a high standard. The impact of the mines and tailings areas in the Elliot Lake area on ground and surface waters and air quality is discussed in detail

  11. Impacts des caractéristiques physico-chimiques des eaux sur la ...

    African Journals Online (AJOL)

    Impacts des caractéristiques physico-chimiques des eaux sur la distribution du ... chimiques qui sont à l'origine d'une dégradation croissante de la qualité d'eau. ... Les valeurs d'indice de diversité de Shannon Weaver traduisent une grande ...

  12. 237 Impacts socio-sanitaires et environnementaux de la gestion des ...

    African Journals Online (AJOL)

    SWEET

    pollution des eaux, érosion des berges des mayo et alluvionnement des drains, amènent à suggérer des ... D'après TUCCI [1], les principaux défis de la gestion des inondations sont liés à l'occupation des ... populations aux impacts des inondations de plaine est due, d'après TUCCI [1], au manque de connaissance.

  13. Impact de la preparation des anodes crues et des conditions de cuisson sur la fissuration dans des anodes denses

    Science.gov (United States)

    Amrani, Salah

    La fabrication de l'aluminium est realisee dans une cellule d'electrolyse, et cette operation utilise des anodes en carbone. L'evaluation de la qualite de ces anodes reste indispensable avant leur utilisation. La presence des fissures dans les anodes provoque une perturbation du procede l'electrolyse et une diminution de sa performance. Ce projet a ete entrepris pour determiner l'impact des differents parametres de procedes de fabrication des anodes sur la fissuration des anodes denses. Ces parametres incluent ceux de la fabrication des anodes crues, des proprietes des matieres premieres et de la cuisson. Une recherche bibliographique a ete effectuee sur tous les aspects de la fissuration des anodes en carbone pour compiler les travaux anterieurs. Une methodologie detaillee a ete mise au point pour faciliter le deroulement des travaux et atteindre les objectifs vises. La majorite de ce document est reservee pour la discussion des resultats obtenus au laboratoire de l'UQAC et au niveau industriel. Concernant les etudes realisees a l'UQAC, une partie des travaux experimentaux est reservee a la recherche des differents mecanismes de fissuration dans les anodes denses utilisees dans l'industrie d'aluminium. L'approche etait d'abord basee sur la caracterisation qualitative du mecanisme de la fissuration en surface et en profondeur. Puis, une caracterisation quantitative a ete realisee pour la determination de la distribution de la largeur de la fissure sur toute sa longueur, ainsi que le pourcentage de sa surface par rapport a la surface totale de l'echantillon. Cette etude a ete realisee par le biais de la technique d'analyse d'image utilisee pour caracteriser la fissuration d'un echantillon d'anode cuite. L'analyse surfacique et en profondeur de cet echantillon a permis de voir clairement la formation des fissures sur une grande partie de la surface analysee. L'autre partie des travaux est basee sur la caracterisation des defauts dans des echantillons d'anodes crues

  14. National inventory of uranium mine sites. Version 2 - September 2007. Realised in the framework of the M.I.M.A.U.S.A. program Memory and impact of Uranium Mines: synthesis and archives; Inventaire national des sites miniers d'uranium. Version 2 - Septembre 2007. Realise dans le cadre du programme MIMAUSA Memoire et Impact des Mines d'urAniUm: Synthese et Archives

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    The M.I.M.A.U.S.A. program allows to end in a compilation and a synthesis of the available data to allow the I.R.S.N., the national and local authorities, but also the public to have a source of quality information about the history of the French uranium mining sites and the possible systems of radiological surveillance set up at the moment; To assure the perpetuity of the knowledge of these sites in spite of the stop of the concerned activities; To establish a working tool for the government services in charge of the definition of the refitting and surveillance programs; And to improve the representativeness of the national network of radiation monitoring in the environment, notably as regards the stations of measure exploited by the I.R.S.N..The M.I.M.A.U.S.A. inventory or the national inventory of the uranium mining sites in France consists of the most exhaustive possible inventory of the sites on which were practised the activities in connection with the exploration (works of recognition of significant scale, the extraction or the treatment of the uranium ore in metropolitan France. The acquired information is synthesized in the form of index cards of sites presented in this document, with in introduction, the manual of the reserved columns and the used terms. The present version follows upon a first version published in 2004. The novelties of the version 2007: a more exhaustive inventory, 30 sites were added, enriched and corrected information, more complete identification of the receiving rivers, more precise and accessible geographical localization, zoom-news on certain mining zones, a paragraph current events. The sources of information are: Areva-Nc, A.N.D.R.A., D.R.I.R.E., and A.S.N.. (N.C.)

  15. Étude des impacts écologiques du dynamisme spatio-temporel des ...

    African Journals Online (AJOL)

    Cette recherche menée dans le Complexe Zones Humides Mahavavy - Kinkony a pour but d'évaluer les impacts écologiques du changement des habitats naturels sur les espèces menacées de sa faune. Des outils tels que le SIG, la télédétection ainsi que Marxan ont été combinés avec les études bibliographiques et les ...

  16. Impact des eaux de réalimentation sur la qualité des eaux ...

    African Journals Online (AJOL)

    eaux du barrage, destinées à la réalimentation. Le modèle hydrodispersif établi permettra de suivre l'évolution du chimisme des eaux de réalimentation et leur impact sur les eaux souterraines de la nappe du massif dunaire de. Bouteldja dans la région de Bordj Ali Bey. 4.1 Détermination des paramètres hydrodispersifs. La.

  17. Remediation of the Lermontov mining site in Russia; Sanierung des Bergbaustandortes Lermontov in Russland

    Energy Technology Data Exchange (ETDEWEB)

    Krotkov, V.V. [Atomredmetzoloto, Moscow (Russian Federation)

    2001-07-01

    For 40 years, uranium mines were operated in the direct vicinity of the spas of Mineralnyje Wody, Pjatigorsk, Kislowodsk, Jessentuki and Shelesnowodsk by the Almaz company. Now that the mines have been abandoned, the spa region is surrounded by contaminated land. Remedial measures are projected in accordance with radiation protection standards. [German] 40 Jahre lang wurde Uranerzbergbau und -aufbereitung in unmittelbarer Naehe der Kurorte Mineralnyje Wody, Pjatigorsk, Kislowodsk, Jessentuki und Shelesnowodsk durch das Unternehmen Almaz betrieben. Gegenwaertig sind die Aktivitaeten des Unternehmens vollstaendig eingestellt. Als Folge entstanden im Gebiet der Kaukasischen Mineralbaeder uranhaltige Halden am Berg Beschtau mit einer Flaeche von 36,0 ha und am Berg Byk mit einer Flaeche von 18,4 ha. Im hydrometallurgischen Werk sind 44,5 ha Betriebsgelaende kontaminiert, wo sich Bauten fuer die Grund- und Hilfsproduktion, Erzlager, das werkseigene Chemielabor und das Heizkraftwerk befinden. Die IAA liegt 1,5 km vom Betriebsgelaende des hydrometallurgischen Werks entfernt und besteht aus fuenf Becken, wo von 1954 bis 1991 Rueckstaende der Uranproduktion eingelagert wurden. Seit 1991 gelangte dorthin Phosphorgips als Abprodukt der Verarbeitung von Apatit. Das sechste Becken ist fuer die Aufnahme von Wasser bei Stoerfaellen in den Hauptbecken bestimmt. Die IAA mit den angrenzenden Flaechen soll saniert werden. Vorrangig gilt es, geschaedigte Flaechen wiederherzustellen und die Situation im Bereich der IAA entsprechend den Normen des Strahlenschutzes sicher zu gestalten. Der Massnahmenkomplex fuer die Sanierung des Territoriums beinhaltet - Stillegung der abgearbeiteten Schlammbecken der IAA, - Rekultivierung der geschaedigten Flaechen im Bergbaugebiet, - Dekontamination der anliegenden kontaminierten Flaechen mit Background-{gamma}+20 {mu}R/h, - Schutz der Grundwaesser vor Kontamination durch eingelagerte Tailings des hydrometallurgischen Werks, - gesteurte Ableitung der

  18. Environmental impact of solution mining for uranium

    International Nuclear Information System (INIS)

    Hunkin, G.G.

    1975-01-01

    Compared with most other mining systems, uranium solution mining has a negligible effect on such environmental factors as surface disturbance, interference with natural groundwater quality and distribution, and aerial discharge of radionuclides. The following topics are discussed: the process, personnel safety and health, tailings disposal, impact on groundwater, operating licenses and controls, legislation, and economics. It is concluded that engineered well systems and controlled input/production flow rates, combined with full recirculation systems that maintain constant fluid volumes in the mineralized formations, result in containment of leach solutions within the operating area. The very dilute leach solutions, compatible with natural groundwaters, ensure that no environmental damage results, even if a loss of control occurred. Reduction in the number of processing steps and virtual elimination of operator hazards, waste disposal and land rehabilitation costs help in reducing overall costs

  19. Protection of mechanized timberings on beds dangerous for mine impacts

    Energy Technology Data Exchange (ETDEWEB)

    Budirsky, S

    1982-01-01

    In some stoping faces on beds which are dangerous for mine impacts, mechanized timbering is successfully used which is not equipped with protection from the effect of these dynamic phenomena. This generated the idea that in the indicated conditions, mechanized timbering may not be equipped with protective devices against dynamic loads. Theoretical studies have shown that the effects of mine impacts depends on the total energy of the impact, distance of this stoping face from the epicenter of the impact, as well as the capacity of the rock massif to transmit and absorb energy of the mine impact. This means that the effect of the mine impact under different conditions is not the same, the mine impacts of lower energy under definite conditions can result in greater damages to the mechanized timbering than mine impact with higher energy. It is believed that the effect of absorption of energy of the mine impact depends on the method of control of the roofing in the stoping face, the presence of hydraulic fill quarantees absorption of up to 80% of its energy. The experience of working beds which are dangerous for mine impacts in the upper Silesia coal basin indicated that the designs of the mechanized timbering, especially shield, in which the stands are not rigidly connected to the roof timber, during operation on beds with thickness 2.5-4 m withstand mine impacts with energy 10/sup 7/ J without significant disorders (mine impacts with this energy occur very frequently . For energy of mine impact of 108 J (impacts with this energy are observed comparatively rarely), the mechanized timberings are considerably damaged.

  20. Late effects of mining operations. Technical and legal aspects. Conference; Spaetfolgen des Bergbaus. Technische und rechtliche Fragen. Tagung

    Energy Technology Data Exchange (ETDEWEB)

    Liese, F. (comp.)

    2000-07-01

    The problem of late effects of mining was reviewed. Solutions were found which may be interesting to other countries as well. [German] Spaetfolgen des Bergbaus - ein sowohl technisch als auch rechtlich hochbrisantes Phaenomen: Bergwerksstandorte wurden aufgegeben, andere Oberflaechennutzungsformen machten sich auf diesem Gelaende breit. Dort koennen auch noch lange nach Einstellung des Bergbaus Schaeden eintreten. Welche technischen Ursachen haben sie? Diese Problematik wird anhand der Situation in Deutschland untersucht. Die Loesungsansaetze koennen aber auch fuer andere Laender fruchtbar gemacht werden. (orig.)

  1. L’impact de la participation bancaire dans le capital des entreprises sur la politique de distribution des dividendes

    Directory of Open Access Journals (Sweden)

    Naoel Mezgani

    2013-11-01

    Full Text Available L’objectif de ce papier est de tester l’incidence de la participation bancaire dans le capital des entreprises non financières sur la politique de distribution des dividendes. En utilisant des données de panel des trente entreprises tunisiennes durant la période de 1999 à 2004, nous vérifions si en détenant le capital et la dette, la banque a la possibilité de contraindre la distribution des dividendes pour garantir le remboursement de ses fonds prêtés. Les résultats empiriques obtenus ne confirment pas l’impact significatif des banques actionnaires majoritaires et principaux créditeurs sur la distribution des dividendes dans les entreprises tunisiennes. Ces dernières soutiennent surtout la stabilité du niveau des dividendes payés d’une année à une autre.

  2. L'IMPACT DES DEPENSES D'INFRASTRUCTURES SUR LA ...

    African Journals Online (AJOL)

    Administrateur

    l'économétrie, dans l'analyse de l'impact des dépenses d'infras- tructures sur la .... montre que les politiques budgétaires de relance peuvent avoir un impact à long terme ...... Sciences Economiques et Sciences de Gestion Université d'Alger.

  3. Impacts des caractéristiques physico-chimiques des eaux sur la ...

    African Journals Online (AJOL)

    Mart.) and Panicum maximum (Jacq.). Water Resources and Industry, 16: 1-18. https://doi.org/10.1016/j.wri.2016.07.001. Priso RJ, Dibong SD, Tchinda-Metagne C,. Taffouo VD, Ndongo D, Amougou A. 2010. Impacts des eaux polluées sur la.

  4. Impacts des caractéristiques physico-chimiques des eaux sur la ...

    African Journals Online (AJOL)

    The present study was undertaken to assess the impact of the physico-chemical characteristics of water on the ..... Il est composé de 4 espèces ... Figure 4 : Plan factoriel F1 x F2 des variables physico-chimiques en fonction du phytoplancton.

  5. Environmental and social impact of uranium mining in Australia

    International Nuclear Information System (INIS)

    Johnston, A.

    2000-01-01

    The mining of uranium at the Ranger and Jabiluka mines in Australia's Northern Territory has been assessed as a case study for the environmental and social impact of uranium mining in Australia. The level of environmental protection achieved has been very high. However, a number of social indicators reveal that the social impact of development in the region, including the mining of uranium, has been significant. A program is now underway to redress these social issues. Links between social and environmental impact have been identified. In today's world, the standards and practices in environmental protection are as much determined by social attitudes as they are by scientific and technical assessment. (author)

  6. Environmental and social impact of uranium mining in Australia

    International Nuclear Information System (INIS)

    Johnston, A.

    2002-01-01

    The mining of uranium at the Ranger and Jabiluka mines in Australia's Northern Territory has been assessed as a case study for the environmental and social impact of uranium mining in Australia. The level of environmental protection achieved has been very high. However, a number of social indicators reveal that the social impact of development in the region, including the mining of uranium, has been significant. A programme is now underway to redress these social issues. Links between social and environmental impact have been identified. In today's world, the standards and practices in environmental protection are as much determined by social attitudes as they are by scientific and technical assessment. (author)

  7. Impact of Jabiluka mine expected to be small

    International Nuclear Information System (INIS)

    Anon.

    1996-01-01

    The draft Environmental Impact Statement (ESI) for the proposed uranium mines at Jabiluka, about 20 Km north of the existing Ranger mine in the Northern Territory was released on 17 October 1996. The EIS concluded that any impact of the proposed mine will be localised, small-scale and temporary. Jabiluka will contribute some $3.8 billion to national economic welfare over the project's predicted 28-year life

  8. Pratiques agricoles et perceptions paysannes des impacts ...

    African Journals Online (AJOL)

    La dégradation des écosystèmes et d'une manière générale de l'environnement au Burkina Faso est liée aux ... L'étude a révélé que 8 types de rotations culturales sont pratiquées dans la zone. ..... OBEPAB (Organisation Béninoise pour la.

  9. Hydrogeochemical assessment of mine-impacted water and sediment of iron ore mining

    Science.gov (United States)

    Nur Atirah Affandi, Fatin; Kusin, Faradiella Mohd; Aqilah Sulong, Nur; Madzin, Zafira

    2018-04-01

    This study was carried out to evaluate the hydrogeochemical behaviour of mine-impacted water and sediment of a former iron ore mining area. Sampling of mine water and sediment were carried out at selected locations within the mine including the former mining ponds, mine tailings and the nearby stream. The water samples were analysed for their hydrochemical facies, major and trace elements including heavy metals. The water in the mining ponds and the mine tailings was characterised as highly acidic (pH 2.54-3.07), but has near-neutral pH in the nearby stream. Results indicated that Fe and Mn in water have exceeded the recommended guidelines values and was also supported by the results of geochemical modelling. The results also indicated that sediments in the mining area were contaminated with Cd and As as shown by the potential ecological risk index values. The total risk index of heavy metals in the sediment were ranked in the order of Cd>As>Pb>Cu>Zn>Cr. Overall, the extent of potential ecological risks of the mining area were categorised as having low to moderate ecological risk.

  10. Environmental impact statement - an effective tool for successful mine design

    International Nuclear Information System (INIS)

    Sinha, A.K.

    1996-01-01

    Mining is a hazardous operation which must be designed to succeed under very unpredictable environmental, geological and marketing conditions over a committed life of thirty years or longer. It is well-established by now that mining has tremendous social, economic and environmental impacts on society in general and on local communities in particular. Mining's image has begun to improve with effective hazard controls and property reclamation through improved mine design and restoration plans. Much of the credit for this achievement should go to Environmental Impact Statement and related permitting requirements for mining projects. An Environmental Impact Statement with respect to almost every type of mining project is now frequently required by major banks, and other funding agencies, governmental agencies and/or citizen groups involved in the permitting process. This impact statement ensures that the proposed project has the potential to succeed under all foreseeable environmental, geological and marketing problems throughout its projected life and to guarantee the return of the initial capital with interest. In short, the impact statement offers assurance that the final project will culminate with positive environmental and social impacts. The relevance and contributions of Environmental Impact Statements in mine design, as well as their applications and development procedures are presented. 3 refs., 8 figs

  11. Managing environmental and health impacts of uranium mining

    Energy Technology Data Exchange (ETDEWEB)

    Vance, R.E.; Cameron, R., E-mail: robert.vance@oecd.org, E-mail: ron.cameron@oecd.org [OECD Nuclear Energy Agency (France)

    2014-07-01

    As the raw material that fuels nuclear power plants that generate significant amounts of electricity with full life cycle carbon emissions as low as renewable energy sources, uranium is a valuable commodity. Yet uranium mining remains controversial, principally because of environmental and health impacts created when mining was undertaken by governments to meet Cold War strategic requirements. Uranium mining is conducted under significantly different circumstances today. Since the era of military production, societal expectations of environmental protection and the safety of workers and the public have evolved as the outcomes of the early era of mining became apparent, driving changes in regulatory oversight and mining practices. Key aspects of leading practice uranium mining are presented (conventional worker health and safety, worker radiation protection, public health and safety, water quality, tailings and waste rock management) and compared with historic practices to demonstrate the scale of differences. The application of additional aspects of uranium mine life cycle management (public consultation, environmental impact assessment, analysis of socio-economic impacts/benefits, environmental monitoring, financial assurance, product transport, security and safeguards, emergency planning and knowledge transfer), introduced as the industry matured, enhance overall management practices for the long term. Results from several case studies show that improved management of key aspects of uranium mining, combined with the incorporation of new life cycle parameters, have transformed the industry into the most regulated and arguably one of the safest and environmentally responsible types of mining in the world. (author)

  12. Environmental impact assessment for surface coal mine - a case study

    International Nuclear Information System (INIS)

    Sen, P.; Chakraborty, K.

    1994-01-01

    Surface coal mines being the largest contributor to the national coal production, the study of environmental impacts due to this becomes mandatory as it will help in proper planning and safe operations of the mine in an environmentally compatible manner. Within the scope of this paper, a model for preparation of comprehensive environmental impact assessment (EIA) by utilising a new evaluation methodology leading to determination of Environmental Quality Designation an index has been developed and this model has been validated by using data from a running surface coal mine in Wardha Valley Coalfield. Based on this exercise, the overall impact of the surface coal mine under consideration on environment indicates a medium level and accordingly the control measures have to be planned. Thus repair to the environment has to be made a concurrent activity with mining i.e. to say we have to design with nature not against it

  13. Assessing environmental impacts of inland sand mining in parts of ...

    African Journals Online (AJOL)

    Sand is a valuable resource for construction and other purposes, however sand mining often result in serious environmental problems such as land degradation, loss of agricultural lands and biodiversity, as well increased poverty among people. This study assessed the environmental impacts of inland sand mining in six ...

  14. Impacts of mining activities on water and soil.

    Science.gov (United States)

    Warhate, S R; Yenkie, M K N; Chaudhari, M D; Pokale, W K

    2006-04-01

    Seven coal mines are situated in Wardha River Valley. These mines are located at Wani (Dist. Yavatmal of Maharashtra). Out of these, 5 open cast coal mines are run by Western Coal Field Ltd. India. The present study has been undertaken to assess the impacts of mining activities in the adjacent areas. Total 25 samples of water and 19 samples of soil from Nilapur, Bramhani, Kolera, Gowari, Pimpari and Aheri were analyzed for pH, TDS, hardness, alkalinity, fluoride, chloride, nitrite, nitrate, phosphate, sulfate, cadmium, lead, zinc, copper, nickel, arsenic, manganese, sodium and potassium, and the results were compared with the limits of Indian Standards: 10500.

  15. GROUNDWATER IMPACTED BY ACID MINE DRAINAGE

    Science.gov (United States)

    The generation and release of acidic, metal-rich water from mine wastes continues to be an intractable environmental problem. Although the effects of acid mine drainage (AMD) are most evident in surface waters, there is an obvious need for developing cost-effective approaches fo...

  16. Managing Environmental and Health Impacts of Uranium Mining

    International Nuclear Information System (INIS)

    Vance, Robert; ); Hinton, Nicole; Huffman, Dale; Harris, Frank; Arnold, Nikolas; Ruokonen, Eeva; Jakubick, Alexander; Tyulyubayev, Zekail; Till, William von; Woods, Peter; ); Hall, Susan; Da Silva, Felipe; Vostarek, Pavel

    2014-01-01

    Uranium is the raw material used to produce fuel for nuclear power plants that generate significant amounts of electricity with life cycle carbon emissions that are as low as renewable energy sources. However, the mining of this valuable energy commodity remains controversial, principally because of environmental and health impacts associated with the early years of uranium mining. Maximising production in the face of rapidly rising demand was the principal goal of uranium mining at the time, with little concern given to properly managing environmental and health impacts. Today, societal expectations and regulation of the industry are directed much more towards radiation protection, environmental stewardship, health and safety. With over 430 operational reactors in the world, nuclear fuel will be required for many decades in order to meet requirements to fuel the existing fleet and demand created by new reactors, given the projected growth in nuclear generating capacity, particularly in the developing world. New mines will in turn be needed. As a result, enhancing awareness of leading practices in uranium mining is increasingly important. This report aims to dispel some of the myths, fears and misconceptions about uranium mining by providing an overview of how leading practice mining can significantly reduce all impacts compared to the early strategic period. It also provides a non-technical overview of leading practices, the regulatory environment in which mining companies operate and the outcomes of implementing such practices. Societal expectations related to environmental protection and the safety of workers and the public evolved considerably as the outcomes of the early era of mining became apparent, driving changes in regulatory oversight and mining practices. Uranium mining is now conducted under significantly different circumstances, with leading practice mining the most regulated and one of the safest and environmentally responsible forms of mining in the

  17. The impact of mining activities on agriculture

    Science.gov (United States)

    Saghatelyan, A.; Sahakyan, L.

    2009-04-01

    The present study was designed to assess environmental status of the territory of the city of Kapan and neighboring agricultural farms with an emphasis on the impact of the tailing repository and operation of the Kapan copper plant on soil, water and plant pollution. The region has long been known for its abundant copper and polymetallic deposits with vein- and stockwork-type mineralization. Moreover, historically Kapan was the miners' city and a powerful copper mining and dressing plant has been operating there since 1846. The performed geochemical survey and a sanitary-hygienic assessment of pollution of the Kapan's soils have indicated high contents of Cu, Pb, Ni, Mo and As vs. the background and Maximum Acceptable Concentrations (MAC). The assessment of pollution levels of surface water, including natural and industrial streams, has indicated that unlike natural stream waters, mining waters from the adit and industrial stream waters were high in a number of toxic (Cd, As, Hg) and ore (Cu, Zn) elements. Activation of most chemical elements and particularly of heavy metals in water environment rapidly brings to pollution of environmental components (soils, plants, etc.), and as a result heavy metals enter the human organism via trophic chains. So, in the frame of the research eco-toxicological studies were performed on accumulation of heavy metals (Cu, Ni, Cr, Zn, Sn, Mo), including high toxic elements (As, Hg, Pb, Cd) in agricultural soils and in the basic assortment of agricultural crops. The research covered agricultural lands within the bounds of the city and private plots in neighboring villages. Wholly, 24 vegetable, melon field, cereal (corn), oil-bearing (sunflower) species adding spicy herbs and fruits were studied. It should be stressed that agricultural crops growing on the study sites are used provide food products not only by the population of this particular city and neighboring villages, but of other cities, too. It means that the average number of

  18. Initial results of India's environmental impact assessment of nodule mining

    Digital Repository Service at National Institute of Oceanography (India)

    Desa, E.

    The Indian Deepsea Experiment (INDEX) was intiated in 1995, with the objective of predicting the environmental impact of nodule mining, in the Central Indian Basin. More than 20 scientists and technical staff of the National Institute...

  19. An appraisal of biological responses and network of environmental interactions in non-mining and mining impacted coastal waters

    Digital Repository Service at National Institute of Oceanography (India)

    Fernandes, C.E.G.; Malik, A; Jineesh, V.K.; Fernandes, S.O.; Das, A; Pandey, S.S.; Kanolkar, G.; Sujith, P.P.; Velip, D.; Shaikh, S.; Helekar, S.; Gonsalves, M.J.B.D.; Nair, S.; LokaBharathi, P.A

    iron brought from the hinterlands. We hypothesize that there could be a shift in biological response along with changes in network of interactions between environmental and biological variables in these mining and non-mining impacted regions, lying 160...

  20. 152 Etude de cas sur l'impact des amendements organiques vis-à ...

    African Journals Online (AJOL)

    john mukalay

    Etude de cas sur l'impact des amendements organiques vis-à-vis de la salinité en culture de bananier. Michel Mazinga KWEY1, Séverin Kalala BANZE2 et John Banza MUKALAY2*. 1Laboratoire des cultures in vitro, Département de phytotechnie, Faculté des sciences agronomiques,. Université de Lubumbashi, BP 1825, ...

  1. Impacts économiques et sociaux de l'égalité des sexes dans l ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Impacts économiques et sociaux de l'égalité des sexes dans l'agriculture commerciale ... Partage des profits et contrôle des ressources ... Transforming Africa's agriculture sector is central to growth and poverty reduction on the continent.

  2. Impacts of mining on water and soil.

    Science.gov (United States)

    Warhate, S R; Yenkie, M K N; Pokale, W K

    2007-04-01

    Out of seven coal mines situated in Wardha River Valley located at Wani (Dist. Yavatmal), five open caste coal mines are run by Western Coal Field Ltd, India. The results of 25 water and 19 soil samples (including one over burden) from Nilapur, Bramhani, Kolera, Gowari, Pimpari and Aheri for their pH, TDS, hardness, alkalinity, fluoride, chloride, nitrite, nitrate, phosphate, sulfate, cadmium, lead, zinc, copper, nickel, arsenic, manganese, sodium and potassium are studied in the present work. Statistical analysis and graphical presentation of the results are discussed in this paper.

  3. Modeling agricultural impacts of longwall mine subsidence: A GIS approach

    International Nuclear Information System (INIS)

    Darmody, R.G.; Vance, S.L.

    1994-01-01

    Illinois is both a major agricultural State and one of the leading coal-producing States. The future of coal mining in Illinois is longwall mining. One of the advantages of longwall mining, and the most noticeable consequence, is immediate subsidence. Mitigation of subsidence effects is the responsibility of the coal company. Research has shown that mitigation is usually effective, but may be difficult in many cases. Minimizing subsidence impact by avoiding sensitive soils in the mine plan is a possibility that should be considered. Predicting agricultural impacts of subsidence would give mine designers and regulating agencies an additional tool to use when evaluating mine plans. This paper reports on the development and an application of a predictive model of agricultural soil subsidence sensitivity (SSS). The SSS model involves integration of selected soil properties in a GIS (geographical information system) to assign a subsidence sensitivity class to a given area. Predicted crop yield losses at a proposed longwall mine in southern Illinois, using corn (Zea mays L.) as a reference, were 6.8% for the longwall panel area but ranged from 4.1% to 9.5% for the individual panels. The model also predicted that mitigation of the affected areas would reduce yield losses to 1.2% for the longwall area and to 0.5% to 1.7% for the individual panels

  4. Preliminary environmental impact statement for the Kvanefjeld uranium mine

    International Nuclear Information System (INIS)

    Pilegaard, K.

    1983-01-01

    The environmental impacts of the mining and milling of uranium from the Kvanefjeld are assessed in order - to provide a general description of the Narssaq area, with special reference to the ecological aspects, - to identify potential pollutants, and if possible to quantify these, - to identify critical pathways and populations, - to evaluate the technical design of the mine and mill in relation to the environment, - to evaluate alternatives, - to provide guidelines for preoperational environmental studies. (EG)

  5. The Economic Impact of Coal Mining in New Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Peach, James; Starbuck, C.

    2009-06-01

    The economic impact of coal mining in New Mexico is examined in this report. The analysis is based on economic multipliers derived from an input-output model of the New Mexico economy. The direct, indirect, and induced impacts of coal mining in New Mexico are presented in terms of output, value added, employment, and labor income for calendar year 2007. Tax, rental, and royalty income to the State of New Mexico are also presented. Historical coal production, reserves, and price data are also presented and discussed. The impacts of coal-fired electricity generation will be examined in a separate report.

  6. Documenting the global impacts of beach sand mining

    Science.gov (United States)

    Young, R.; Griffith, A.

    2009-04-01

    For centuries, beach sand has been mined for use as aggregate in concrete, for heavy minerals, and for construction fill. The global extent and impact of this phenomenon has gone relatively unnoticed by academics, NGOs, and major news sources. Most reports of sand mining activities are found at the very local scale (if the mining is ever documented at all). Yet, sand mining in many localities has resulted in the complete destruction of beach (and related) ecosystems along with severe impacts to coastal protection and tourism. The Program for the Study of Developed Shorelines at Western Carolina University and Beachcare.org have initiated the construction of a global database of beach sand mining activities. The database is being built through a combination of site visits and through the data mining of media resources, peer reviewed papers, and reports from private and governmental entities. Currently, we have documented sand mining in 35 countries on 6 continents representing the removal of millions of cubic meters of sand. Problems extend from Asia where critical infrastructure has been disrupted by sand mining to the Caribbean where policy reform has swiftly followed a highly publicized theft of sand. The Program for the Study of Developed Shorelines recently observed extensive sand mining in Morocco at the regional scale. Tens of kilometers of beach have been stripped of sand and the mining continues southward reducing hope of a thriving tourism-based economy. Problems caused by beach sand mining include: destruction of natural beaches and the ecosystems they protect (e.g. dunes, wetlands), habitat loss for globally important species (e.g. turtles, shorebirds), destruction of nearshore marine ecosystems, increased shoreline erosion rates, reduced protection from storms, tsunamis, and wave events, and economic losses through tourist abandonment and loss of coastal aesthetics. The threats posed by sand mining are made even more critical given the prospect of a

  7. Hydrogeologic and environmental impact of amjhore pyrite mines, India

    Science.gov (United States)

    Choubey, Vishnu D.; Rawat, Rajendra K.

    1991-01-01

    Drainage from active and inactive pyrite mines has produced chemical and physical pollution of both ground- and surface water in Amjhore region. In the present case, chemical pollution is caused by exposing pyrite minerals to oxidation or leaching, resulting in undesirable concentrations of dissolved materials. Pyrite mining suddenly exposed large quantities of sulfides to direct contact with oxygen, and oxidation proceeds rapidly, resulting in acidity and release of metal (Fe) and sulfates to the water system, eventually resulting in water pollution in the region. The magnitude and impact of the problem is just being recognized and, as the present and the future projected demand for clean water is of top priority, the present studies were undertaken. Mine drainage includes water flowing from the surface and underground mines and runoff or seepage from the pyrite mines. This article describes the various hydrologic factors that control acid water formation and its transport. The mine drainage is obviously a continuing source of pollution and, therefore, remedial measures mainly consisting of a double-stage limestone-lime treatment technique have been suggested. The present results will be used to develop an alternative and more effective abatement technology to mitigate acid production at the source, namely, the technique of revegetation of the soil cover applied to the waste mine dump material. Water quality change is discussed in detail, with emphasis on acidity formed from exposed pyrite material and on increase in dissolved solids. Preventive and treatment measures are recommended.

  8. The environmental impact assessment of uranium mining in Australia

    International Nuclear Information System (INIS)

    Morvell, G.

    2002-01-01

    Federal environmental impact assessment legislation has existed in Australia since 1974. A number of uranium mines have been developed in this time, utilizing a range of mining techniques, including opencut, underground and in-situ leach. Projects have also been undertaken in a variety of geographical areas requiring consideration of diverse biodiversity, cultural heritage and social impact issues. Assessment of uranium mining proposals in Australia is also conducted in a climate of political opposition from a cross section of the Australian community. This paper outlines some of the key issues that arose during recent assessments and which provide a lead to the role of environmental impact assessment in environmental policy development. Issues are also relevant to recent assessments on a replacement nuclear reactor, shipments of waste for reprocessing and proposed assessments on proposals for low and intermediate level nuclear waste facilities. (author)

  9. Systematic review of community health impacts of mountaintop removal mining.

    Science.gov (United States)

    Boyles, Abee L; Blain, Robyn B; Rochester, Johanna R; Avanasi, Raghavendhran; Goldhaber, Susan B; McComb, Sofie; Holmgren, Stephanie D; Masten, Scott A; Thayer, Kristina A

    2017-10-01

    The objective of this evaluation is to understand the human health impacts of mountaintop removal (MTR) mining, the major method of coal mining in and around Central Appalachia. MTR mining impacts the air, water, and soil and raises concerns about potential adverse health effects in neighboring communities; exposures associated with MTR mining include particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), metals, hydrogen sulfide, and other recognized harmful substances. A systematic review was conducted of published studies of MTR mining and community health, occupational studies of MTR mining, and any available animal and in vitro experimental studies investigating the effects of exposures to MTR-mining-related chemical mixtures. Six databases (Embase, PsycINFO, PubMed, Scopus, Toxline, and Web of Science) were searched with customized terms, and no restrictions on publication year or language, through October 27, 2016. The eligibility criteria included all human population studies and animal models of human health, direct and indirect measures of MTR-mining exposure, any health-related effect or change in physiological response, and any study design type. Risk of bias was assessed for observational and experimental studies using an approach developed by the National Toxicology Program (NTP) Office of Health Assessment and Translation (OHAT). To provide context for these health effects, a summary of the exposure literature is included that focuses on describing findings for outdoor air, indoor air, and drinking water. From a literature search capturing 3088 studies, 33 human studies (29 community, four occupational), four experimental studies (two in rat, one in vitro and in mice, one in C. elegans), and 58 MTR mining exposure studies were identified. A number of health findings were reported in observational human studies, including cardiopulmonary effects, mortality, and birth defects. However, concerns for risk of bias were identified, especially

  10. Mine water management. Modification of the mine water management in the Ruhr district within the decommissioning of the hard coal mining; Grubenwasserhaltung. Aenderung der Grubenwasserhaltung im Ruhrrevier im Zuge der Stilllegung des Steinkohlenbergbaues

    Energy Technology Data Exchange (ETDEWEB)

    Terwelp, Tassilo [Bezirksregierung Arnsberg, Dortmund (Germany). Dezernat 63 - Zentrale Grubenwasserhaltung, Grubenwassernstieg, Schachtverfuellung

    2013-03-15

    Within the so-called Legacy Agreement regarding the overcoming of the burdens in perpetuity of the coal mining of the RAG AG (Herne, Federal Republic of Germany), the Federal States North Rhine-Westphalia (Federal Republic of Germany) and Saarland (Federal Republic of Germany) as well as the RAG Foundation (Essen, Federal Republic of Germany) have regulated the mine water drainage in the decommissioning of the mines. Under this aspect, the department 'Mining and energy in NRW' of the district government Arnsberg (Federal Republic of Germany) as the mining authority increasingly is concerned with the topic mine water in the Ruhr district. In this context, the district government Arnsberg is responsible for an organized mine water control after the withdrawal of the hard coal mining. The main aims of this are the protection of the surface area being mined and mine safety aspects. As part of the withdrawal from the deposit, the rise of the mine water level has to be planned and controlled carefully in order to avoid adverse impacts at the surface of the area to be mined.

  11. Hydrogeologic impacts of underground (Longwall) mining in the Illinois basin

    International Nuclear Information System (INIS)

    Booth, C.J.

    1992-01-01

    This paper reports that hydrogeological impacts of active longwall mining were studied at two sites in Illinois. At the site with the more transmissive sandstone aquifer, aquifer permeabilities increased an order of magnitude due to subsidence. Piezometric levels declined with subsidence due to increased porosity, and ahead of mining due to a transmitted drawdown. Levels recovered rapidly at first and fully over two years. At the site with the less transmissive aquifer, impacts were similar except that recovery has been limited. Local aquifer enhancement through increased yield can occur, but only where the aquifer is transmissive enough for recovery

  12. Des filles en or : le rôle méconnu des femmes dans les mines ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    17 oct. 2017 ... C'est là que Mme Nakacho a commencé, il y a trois ans. ... et peu de recherches ont été faites sur les rôles des femmes dans ce secteur. ... pour adapter les lois et les politiques gouvernementales de sorte qu'elles appuient le ...

  13. Environmental impact analysis of mine tailing reservoir

    Science.gov (United States)

    Gong, J. Z.

    2016-08-01

    Under certain conditions landscape topography which utilizes mine tailing reservoir construction using is likely to increase lateral recharge source regions, resulting in dramatic changes to the local hydrological dynamic field and recharge of downstream areas initiated by runoff, excretion state, elevated groundwater depth, shallow groundwater, rainfall direct communication, and thinning of the vadose zone. Corrosive leaching of topsoil over many years of exposure to chemical fertilizers and pesticides may result in their dissolution into the groundwater system, which may lead to excessive amounts of many harmful chemicals, therby affecting the physical and mental health of human residents and increase environmental vulnerability and risk associated with the water and soil. According to field survey data from Yujiakan, Qian'an City, and Hebei provinces, this paper analyzes the hydrogeological environmental mechanisms of areas adjacent to mine tailing reservoirs and establishes a conceptual model of the local groundwater system and the concentration-response function between NO3 - content in groundwater and the incidence of cancer in local residents.

  14. Impact of mining activities on water resources in the vicinity of the Obuasi Mine

    International Nuclear Information System (INIS)

    Akabzaa, T.M.; Banoeng-Yakubo, B.K.; Sekyire, J.S.

    2007-01-01

    Surface and groundwater samples within the catchment area of the Obuasi mine were analysed to assess the impact of mining activities on water resources. The concentration of Fe, Mn, Cu, Zn, Pb, Cd, Hg, As and selected major ions in water samples were analysed to assess their role in the contamination of both surface and ground water. The mineralogical composition of various mine spoil and rock samples was investigated by microprobe analysis to ascertain the possible sources of the metals in drainage and ground water. The hydrochemical analytical study, using standard methods, shows that streams in the study area have higher trace and major ions loading than ground water with iron and arsenic concentrations ranging from 0.025 mg/l to 17.19 mg/l and < 0.001 mg/l to 18.91 mg/l, respectively. Hydrochemical modeling of water types showed varied composition for both ground and surface water, but with strong indication of mixed waters from a variety of sources. The microprobe results showed that waste rocks and related mine spoil contain a variety of Fe, Cu, As, Sb, Zn and co-bearing sulphides with strong compositional variations, and account for the augmented levels of these metals in drainage proximal to mining and processing facilities. The probe results did not show Hg in mine spoil, and very high Hg values observed in the vicinity of areas of intense illegal small-scale mining are attributed to the use of this chemical by miners in gold amalgamation. (au)

  15. Economic Impacts of Surface Mining on Household Drinking Water Supplies

    Science.gov (United States)

    This report provides information on the economic and social impacts of contaminated surface and ground water supplies on residents and households near surface mining operations. The focus is on coal slurry contamination of water supplies in Mingo County, West Virginia, and descr...

  16. Geology and environmental impact of artisanal gold mining around ...

    African Journals Online (AJOL)

    Geology and effect of artisanal gold mining was investigated in Kataeregi and environ, North-central Nigeria with the aim of determining its host rock and assessing the impact of such activity on the surrounding. Geological field mapping show the area comprise of the Migmatite-Gneiss complex, Schist, Granite and ...

  17. Socio-economic and environmental impact of mining on women in Kasigau mining zone in Taita Taveta County

    Directory of Open Access Journals (Sweden)

    Maarifa Ali Mwakumanya

    2016-01-01

    Full Text Available The Kasigau ward is home to many gemstones with their mining contributing to the county's economic development. The mining sector is dominated by artisanal and small scale mining with 3–5% of women employed. A Participatory Action Research (PAR approach was used to involve women with the aim of establishing home-grown interventions. Seven villages and forty nine households participated in household interviews, Focus Group Discussions (FGDs and female feedback reflection meetings to generate and analyze data. Women worked as zururas (workers or employees, in deplorable environmental conditions, and were heavily impacted by mining activities. Women developed actionable strategies on productive engagement in the artisanal mining sector.

  18. Application of MIKE SHE to study the impact of coal mining on river runoff in Gujiao mining area, Shanxi, China.

    Directory of Open Access Journals (Sweden)

    Jianhua Ping

    Full Text Available Coal mining is one of the core industries that contribute to the economic development of a country but deteriorate the environment. Being the primary source of energy, coal has become essential to meet the energy demand of a country. It is excavated by both opencast and underground mining methods and affects the environment, especially hydrological cycle, by discharging huge amounts of mine water. Natural hydrological processes have been well known to be vulnerable to human activities, especially large scale mining activities, which inevitably generate surface cracks and subsidence. It is therefore valuable to assess the impact of mining on river runoff for the sustainable development of regional economy. In this paper, the impact of coal mining on river runoff is assessed in one of the national key coal mining sites, Gujiao mining area, Shanxi Province, China. The characteristics of water cycle are described, the similarities and differences of runoff formation are analyzed in both coal mining and pre-mining periods. The integrated distributed hydrological model named MIKE SHE is employed to simulate and evaluate the influence of coal mining on river runoff. The study shows that mining one ton of raw coal leads to the reduction of river runoff by 2.87 m3 between 1981 and 2008, of which the surface runoff decreases by 0.24 m3 and the baseflow by 2.63 m3. The reduction degree of river runoff for mining one ton of raw coal shows an increasing trend over years. The current study also reveals that large scale coal mining initiates the formation of surface cracks and subsidence, which intercepts overland flow and enhances precipitation infiltration. Together with mine drainage, the natural hydrological processes and the stream flows have been altered and the river run off has been greatly reduced.

  19. Application of MIKE SHE to study the impact of coal mining on river runoff in Gujiao mining area, Shanxi, China.

    Science.gov (United States)

    Ping, Jianhua; Yan, Shiyan; Gu, Pan; Wu, Zening; Hu, Caihong

    2017-01-01

    Coal mining is one of the core industries that contribute to the economic development of a country but deteriorate the environment. Being the primary source of energy, coal has become essential to meet the energy demand of a country. It is excavated by both opencast and underground mining methods and affects the environment, especially hydrological cycle, by discharging huge amounts of mine water. Natural hydrological processes have been well known to be vulnerable to human activities, especially large scale mining activities, which inevitably generate surface cracks and subsidence. It is therefore valuable to assess the impact of mining on river runoff for the sustainable development of regional economy. In this paper, the impact of coal mining on river runoff is assessed in one of the national key coal mining sites, Gujiao mining area, Shanxi Province, China. The characteristics of water cycle are described, the similarities and differences of runoff formation are analyzed in both coal mining and pre-mining periods. The integrated distributed hydrological model named MIKE SHE is employed to simulate and evaluate the influence of coal mining on river runoff. The study shows that mining one ton of raw coal leads to the reduction of river runoff by 2.87 m3 between 1981 and 2008, of which the surface runoff decreases by 0.24 m3 and the baseflow by 2.63 m3. The reduction degree of river runoff for mining one ton of raw coal shows an increasing trend over years. The current study also reveals that large scale coal mining initiates the formation of surface cracks and subsidence, which intercepts overland flow and enhances precipitation infiltration. Together with mine drainage, the natural hydrological processes and the stream flows have been altered and the river run off has been greatly reduced.

  20. Methods for assessing mine site rehabilitation design for erosion impact

    International Nuclear Information System (INIS)

    Evans, K. G.

    2000-01-01

    Erosion of rehabilitated mines may result in landform instability, which in turn may result in exposure of encapsulated contaminants, elevated sediment delivery at catchment outlets, and subsequent degradation of downstream water quality. Rehabilitation design can be assessed using erosion and hydrology models calibrated to mine site conditions. Incision rates in containment structures can be quantified using 3-dimensional landform evolution simulation techniques. Sediment delivery at catchment outlets for various landform amelioration techniques can be predicted using process-based and empirical erosion-prediction models and sediment delivery ratios. The predicted sediment delivery can be used to estimate an average annual stream sediment load that can, in turn, be used to assess water quality impacts. Application of these techniques is demonstrated through a case study applied to a proposed rehabilitation design option for the Energy Resources of Australia Ltd (ERA) Ranger Mine in the Northern Territory of Australia. Copyright (2000) CSIRO Australia

  1. OGM Diffusion des OGM et impact pour les agriculteurs : quels sont les liens ?

    Directory of Open Access Journals (Sweden)

    Lemarie Stéphane

    2001-05-01

    Full Text Available Les OGM actuellement sur le marché présentent des innovations sur des fonctions de protection des plantes. Selon les problèmes de protection des plantes, les gains des agriculteurs liés à l’adoption des OGM sont très variables. Cette hétérogénéité pose d’importants problèmes méthodologiques pour pouvoir estimer correctement la distribution des gains pour l’ensemble des agriculteurs. Une synthèse de plusieurs études américaines est réalisée ici et met bien en évidence la diversité des méthodes utilisées, chacune d’elles présentant ses avantages et ses limites. Globalement, si la diffusion des OGM est un fait indéniable, les études ne permettent pas de tirer des conclusions aussi nettes quant à l’impact des OGM pour tous les agriculteurs qui adoptent ces produits, et cela en particulier pour le soja. Cette absence de conclusion s’explique en grande partie par la difficulté à mesurer certains facteurs qui influencent le comportement d’adoption, comme par exemple la simplification de la conduite des cultures. En contrepartie, il faut noter que les études présentées ici ne prennent pas en compte un certain nombre d’effets indirects qui peuvent faire diminuer les gains des agriculteurs.

  2. Impact of coal mining subsidence on farmland in eastern China

    International Nuclear Information System (INIS)

    Hu, Z.; Hu, F.; Li, J.; Li, H.

    1997-01-01

    This paper discusses damage characteristics of farmland due to coal mining subsidence in eastern China. The landscape of the mining subsidence trough has been divided into three zones; central zone, trough margin zone an dinner-edge zone. Each zone had a specific characteristic of deformation. The water accumulation, prone (downward sloping) land and fissures are typical damage characteristics of the subsidence landscape in eastern China. Based on soils analysis at different positions of the subsidence trough, the impact of mining subsidence on soil properties was identified. The physical properties of soil sensitive to mining subsidence were bulk density, water content and hydraulic conductivity, and they showed worsening form the top to the centre of the subsidence trough. Except for soil electrical conductivity, the tested soil chemical properties were not so sensitive to mining subsidence. They may however change after subsidence. An accumulation of salt was found in both new and old subsidence areas and the old subsidence area had a higher salt content. The soil biomass C in newly subsided land showed a decreasing trend from the top to the centre of the subsidence trough, but no obvious trend was observed in the old subsidence areas. Based on the soil analysis of subsided land, soil erosion was identified as a serious problem, most severe in the middle of the prone land. 4 refs., 5 figs., 1 tab

  3. Étude des impacts écologiques du dynamisme spatio-temporel des ...

    African Journals Online (AJOL)

    transformer radicalement les occupations du sol. Toutefois, le recul des .... également de cette protection (Roberge et Angelstam 2004). L'objectif est de ... distribution des espèces cibles a ensuite été cartographiée sur la couche d'unités de ...

  4. 127 Impact des rejets urbains et industriels sur la qualité des eaux ...

    African Journals Online (AJOL)

    PR BOKO

    scour of surfaces and underground. Keywords :aquifer, hydrochimy, rejections, pollution, El Kantara, Biskra, Algeria. 1. Introduction. La qualité des ..... A case study: Suquıa River Basin Au vue des résultats d'analyses hydrochimique, les concentrations en sulfates dépassent la norme (200-400mg/L). (Cordoba-. Argentina).

  5. Avoir un impact à grande échelle au moyen des services de ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Avoir un impact à grande échelle au moyen des services de vulgarisation reposant sur les TIC au Ghana (FCRSAI, phase II). En Afrique, les services de vulgarisation agricoles peuvent contribuer à développer les marchés et à renforcer la sécurité alimentaire des petits exploitants agricoles. La vulgarisation agricole se sert ...

  6. Underground coal mine subsidence impacts on surface water

    International Nuclear Information System (INIS)

    Stump, D.E. Jr.

    1992-01-01

    This paper reports that subsidence from underground coal mining alters surface water discharge and availability. The magnitude and areal extent of these impacts are dependent on many factors, including the amount of subsidence, topography, geology, climate, surface water - ground water interactions, and fractures in the overburden. There alterations may have positive and/or negative impacts. One of the most significant surface water impacts occurred in July 1957 near West Pittston, Pennsylvania. Subsidence in the Knox Mine under the Coxton Yards of the Lehigh Valley Railroad allowed part of the discharge in the Susquehanna River to flow into the mine and create a crater 200 feet in diameter and 300 feet deep. Fourteen railroad gondola cars fell into the hole which was eventually filled with rock, sand, and gravel. Other surface water impacts from subsidence may include the loss of water to the ground water system, the gaining of water from the ground water system, the creation of flooded subsidence troughs, the increasing of impoundment storage capacity, the relocation of water sources (springs), and the alteration of surface drainage patterns

  7. Economic impact of uranium mining in Texas

    International Nuclear Information System (INIS)

    Leaming, G.F.

    1980-01-01

    The principal economic impacts are the result of three flows of money from the industry into the remainder of the state's economy. These are: money paid to individuals (personal income); money paid to other businesses (business income); and money paid to state and local governments (government revenues). Growth has come in a largely rural, seven-county area that lies within the triangle formed by the Laredo, San Antonio, and Corpus Christi metropolitan areas. 4 refs

  8. Uranium mining impacts on water resources in Brazil

    International Nuclear Information System (INIS)

    Simoes Filho, Francisco Fernando Lamego; Lauria, Dejanira C.; Vasconcellos, Luisa M.H.; Fernandes, Horst M.; Clain, Almir F.; Silva, Liliane F.

    2009-01-01

    Uranium mining and milling activities started operations in Brazil during the 80's. The first production Center was deployed in Pocos de Caldas (CIPC) State of Minas Gerais. The mine was exhausted in 1997, after has produced only 1200 t of U 3 O 8 . The second uranium plant began the operations in Caetite (URA), Bahia State, since 1999 and keeps operations until now with an annual U 3 O 8 production of up to 400 t. The company plans to double this mark in Caetite production center with the exploration of another uranium deposits and initiate underground operations of current open-pit mine. Simultaneously, they are seeking a license for a third plant in the State of Ceara that could produce the double of foreseen capacity in URA. This scenery drives to some issues related to the impact of uranium production on water resources of the respective watersheds. The CIPC plant is a closing mine site, which requires permanent treatment of the company due to the fact their sources of pollutants are subject to the occurrence of Acid Mine Drainage. The URA plant is located in a semi-arid region of Brazil. The extraction of uranium from the ore is achieved by means of a Heap-Leach process, which has low water demand supplied by a network of wells and from a dam, but can contribute to change the groundwater quality and in some cases the extinguishing of wells was observed. An overall assessment of these impacts in national level could produce some lessons that we must take advantage for the ongoing project of Santa Quiteria or even in future sites. (author)

  9. Potential Health Impacts of Bauxite Mining in Kuantan

    OpenAIRE

    Abdullah, Noor Hisham; Mohamed, Norlen; Sulaiman, Lokman Hakim; Zakaria, Thahirahtul Asma; Rahim, Daud Abdul

    2016-01-01

    Bauxite mining is not known to most Malaysian except recently due to environmental pollution issues in Kuantan, Pahang. Potential impacts are expected to go beyond physical environment and physical illness if the situation is not controlled. Loss of economic potentials, and the presence of unpleasant red dust causing mental distress, anger and community outrage. More studies are needed to associate it with chronic physical illness. While evidences are vital for action, merely waiting for a di...

  10. Sediment processes modelling below hydraulic mining: towards environmental impact mitigation

    Science.gov (United States)

    Chalov, Sergey R.

    2010-05-01

    Placer mining sites are located in the river valleys so the rivers are influenced by mining operations. Frequently the existing mining sites are characterized by low contribution to the environmental technologies. Therefore hydraulic mining alters stream hydrology and sediment processes and increases water turbidity. The most serious environmental sequences of the sediment yield increase occur in the rivers populated by salmon fish community because salmon species prefer clean water with low turbidity. For instance, the placer mining in Kamchatka peninsula (Far East of Russia) which is regarded to be the last global gene pool of wild salmon Oncorhynchus threatens the rivers ecosystems. System of man-made impact mitigation could be done through the exact recognition of the human role in hydrological processes and sediment transport especially. Sediment budget of rivers below mining sites is transformed according to the appearance of the man-made non-point and point sediment sources. Non-point source pollution occurs due to soil erosion on the exposed hillsides and erosion in the channel diversions. Slope wash on the hillsides is absent during summer days without rainfalls and is many times increased during rainfalls and snow melting. The nearness of the sources of material and the rivers leads to the small time of suspended load increase after rainfalls. The average time of material intake from exposed hillsides to the rivers is less than 1 hour. The main reason of the incision in the channel diversion is river-channel straightening. The increase of channel slopes and transport capacity leads to the intensive incision of flow. Point source pollution is performed by effluents both from mining site (mainly brief effluents) and from settling ponds (permanent effluents), groundwater seepage from tailing pits or from quarries. High rate of groundwater runoff is the main reason of the technological ponds overfilling. Intensive filtration from channel to ponds because of

  11. Eco-socio Impact of Mineral Resource Mining in the Karamoja ...

    African Journals Online (AJOL)

    Eco-socio Impact of Mineral Resource Mining in the Karamoja Region of ... Oftentimes, the economic aspect of mining overshadows ecological and social needs in ... For that reason, Karamoja region has experienced violent ethnic conflicts, ...

  12. Impacts des effluents liquides industriels sur l'environnement urbain ...

    African Journals Online (AJOL)

    industrialisation l'un des maillons essentiels du développement, après le succès de l'agriculture. Mais la mise en oeuvre de cette politique pose parfois des problèmes d'environnement à Abidjan. La présente étude a pour objectif principal ...

  13. Environmental impact of uranium mining and milling in Australia

    International Nuclear Information System (INIS)

    Levins, D.M.

    1980-01-01

    Australia has almost twenty per cent of the Western World's low-cost uranium reserves, located mostly in the Alligator Rivers region of the Northern Territory. At present, only one uranium mill is operating in Australia, but a number of new mills are planned for the early 1980s. Details are given of Australian uranium mining and milling proposals and the measures taken to minimize their environmental impact. Major factors affecting environmental impact are discussed, including treatment of liquid wastes, water management, control of radon and other airborne releases, and disposal of tailings. (auth)

  14. Potential Health Impacts of Bauxite Mining in Kuantan.

    Science.gov (United States)

    Abdullah, Noor Hisham; Mohamed, Norlen; Sulaiman, Lokman Hakim; Zakaria, Thahirahtul Asma; Rahim, Daud Abdul

    2016-05-01

    Bauxite mining is not known to most Malaysian except recently due to environmental pollution issues in Kuantan, Pahang. Potential impacts are expected to go beyond physical environment and physical illness if the situation is not controlled. Loss of economic potentials, and the presence of unpleasant red dust causing mental distress, anger and community outrage. More studies are needed to associate it with chronic physical illness. While evidences are vital for action, merely waiting for a disease to occur is a sign of failure in prevention. All responsible agencies should focus on a wider aspect of health determinants rather than merely on the occurrence of diseases to act and the need to emphasize on sustainable mining to ensure health of people is not compromised.

  15. Uranium mining and processing: their radiation impact into the environment

    International Nuclear Information System (INIS)

    Ostapczuk, Peter; Zoriy, Petro; Dederichs, Herbert; Lennartz, Reinhard

    2008-01-01

    Based on Thorium and Uranium determination in soil and plants samples collected in the region of Aktau, Kazakhstan the distribution pattern of environmental pollution by these elements was correlated with the radiation dose. The main radiation source was the waste deposit of the equipment used by the uranium processing (dose higher than 5 μSv/h). The mining area and also the transportation way from mine to the uranium factory has also an radiation impact which is difficult to estimate. Based on the data found by plants and soil samples all the area under study has a higher pollution level by Thorium and Uranium than the control area (about 0.1μSv/h). Due to observed strong wind blowing in different directions it is possible that the particle of uranium ore has been transported for long distance and polluted the plants and upper soil layer. The further investigations should get more information about this supposition. (author)

  16. Assessment of the impact of underground mining on ground surface

    International Nuclear Information System (INIS)

    Toomik, Arvi

    1999-01-01

    The mine able oil shale bed is located in horizontally lying Ordovician limestones at a depth of 10-60 meters from the ground surface. Limestones are covered with Quaternary sediments, mainly till and loam, sporadically seams of clay occur. The overburden rocks of oil shale bed are jointed limestones with weak contacts between layers. The upper part of limestones is weakened additionally due to weathering to depths of 10-20 metres. Ground movements caused by mining reach the ground surface easily due to the shallow location of workings. The size and nature of these movements depend on mining and roof control methods used. In this study the impact of geotechnical processes on the ground surface caused by four different mining methods is analysed. A new, artificial micro relief is formed on undermined areas, where the ground surface depressions are alternating with rising grounds. When the Quaternary cover contains loamy sediments, the surface (rain) water will accumulate in the depressions. The response of usable lands on undermined areas depends on the degree of changes in the relief and water regime. There exists a maximum degree (limit) of changes of ground movements in case of which the changes in land use are not yet considerable. The factor of land deterioration was developed for arable and forest lands taking into account the character and degree of negative impacts. When no one deterioration factor exceeds the limit, the value of arable land will be 1.0 (100%). When some factor exceeds the limit, then water logging in subsidence troughs will diminish the value to 0.7, slopes to 0.8 and the area of weathered basic rocks to 0.9. In case of a combined effect of all these factors the value of arable land will fall to 0.5. As the long-term character of ground movement after room and pillar mining is not yet established, the factor for quasi stable areas is taken preliminarily as 0.9. Using detailed plans of mined out areas and the proposed factors, it is possible

  17. The economic impact of peste des petits ruminants in India.

    Science.gov (United States)

    Bardhan, D; Kumar, S; Anandsekaran, G; Chaudhury, J K; Meraj, M; Singh, R K; Verma, M R; Kumar, D; Kumar P T, N; Ahmed Lone, S; Mishra, V; Mohanty, B S; Korade, N; De, U K

    2017-04-01

    Peste des petits ruminants (PPR) is an economically important livestock disease which affects a vast section of the small ruminant population in India. However, data on the incidence of PPR are limited and scant literature is available on the economic losses caused by the disease. In the present study, a structured sampling design was adopted, which covered the major agro-climatic regions of the country, to ascertain the morbidity and mortality rates of PPR. Available estimates of the economic losses in India due to various livestock diseases are based on single values of various epidemiological and economic parameters. Stochastic modelling was used to estimate the economic impact of PPR. Overall annual morbidity and mortality rates of PPR for small ruminants in India have been estimated from the sample as being 8%and 3.45%, respectively. The authors have analysed variations in these rates across species, age group, sex, season and region. The expected annual economic loss due to PPR in India ranges from as little as US $2 million to $18 million and may go up to US $1.5 billion; the most likely range of expected economic losses is between US $653 million and $669 million. This study thus reveals significant losses due to the incidence of PPR in small ruminants in India.

  18. L’impact des privatisations sur la performance des entreprises françaises

    OpenAIRE

    Michel Albouy; Hassan Obeid

    2007-01-01

    (VF)Les déficits budgétaires de nombreux pays, la faiblesse des performances financières des entreprises publiques et les développements récents de la recherche en finance incitent de nombreux États à céder leurs entreprises au secteur privé. Après un panorama du mouvement de privatisation dans le monde et particulièrement en France ainsi qu’un exposé des principaux courants théoriques qui confortent ce mouvement, cet article expose les résultats d’une étude empirique réalisée sur les privati...

  19. Using the Continuous Improvement Process to optimize opencast mining operations; Nutzung des kontinuierlichen Verbesserungsprozesses zur Optimierung des Tagebaubetriebs

    Energy Technology Data Exchange (ETDEWEB)

    Oster, Arthur [RWE Power AG, Eschweiler (Germany). Tagebau Inden

    2011-11-15

    The value chain in the energy industry has changed over the last few years. Several stages, such as energy trading, have gained in significance while the character of others, for instance electricity generation, has changed. RWE Power is actively participating in shaping this change process and is a driving force of change. One focus of RWE Power's strategic alignment is on a highly efficient and integrated core business in lignite mining and lignite-based electricity generation. The Continuous Improvement Process ''immer:besser'' (getting better) ensures the continuous achievement and development of operational and commercial excellence in our daily operations. As a corporate culture this determines the requirements to be met by entrepreneurial ideas. It also ensures an increase in performance as well as cost reduction in our daily business. Obtaining cost reductions and efficiency increases with the aid of the Continuous Improvement Process as a kind of value-adding self-renewal process to ensure that lignite remains competitive, forms the basis for further increases in profitability and growth.

  20. Mercury pollution in Wuchuan mercury mining area, Guizhou, Southwestern China: the impacts from large scale and artisanal mercury mining.

    Science.gov (United States)

    Li, Ping; Feng, Xinbin; Qiu, Guangle; Shang, Lihai; Wang, Shaofeng

    2012-07-01

    To evaluate the environmental impacts from large scale mercury mining (LSMM) and artisanal mercury mining (AMM), total mercury (THg) and methyl mercury (MeHg) were determined in mine waste, ambient air, stream water and soil samples collected from Wuchuan mercury (Hg) mining area, Guizhou, Southwestern China. Mine wastes from both LSMM and AMM contained high THg concentrations, which are important Hg contamination sources to the local environment. Total gaseous mercury (TGM) concentrations in the ambient air near AMM furnaces were highly elevated, which indicated that AMM retorting is a major source of Hg emission. THg concentrations in the stream water varied from 43 to 2100 ng/L, where the elevated values were mainly found in the vicinity of AMM and mine waste heaps of LSMM. Surface soils were seriously contaminated with Hg, and land using types and organic matter played an important role in accumulation and transportation of Hg in soil. The results indicated heavy Hg contaminations in the study area, which were resulted from both LSMM and AMM. The areas impacted by LSMM were concentrated in the historical mining and smelting facilities, while Hg pollution resulted from AMM can be distributed anywhere in the Hg mining area. Copyright © 2011 Elsevier Ltd. All rights reserved.

  1. Long term radiological impact of a uranium mine restoration

    International Nuclear Information System (INIS)

    Mora, Veronica; Bordonaba Marisa; Sanchez Guillermo

    2008-01-01

    During the 1990s, many uranium mines were closed as consequence of low prices of this mineral. It was due to a decrease in the demand for uranium and an increase in the overall supply. The resulting was a further complicated implementation of sites restorations. This report deals with one of the relevant aspects of the radiological protection scope: 'the evaluation of the long term radiological impact in the population due to the uranium mine restoration activities' for the uranium mine sited in Saelices el Chico (Salamanca, Spain). These restoration activities have basically consisted of recovering the original site by filling the old open pits with the material stockpiled in the waste dumps. The main problems associated with this material include radon release and particles emission. The strategy used to solve this problem has been covered these structures with a layer with beds of clay material rock, waste material and a cover tree. The pathways considered for the radiological impact have been: 1) Inhalation; 2) Ingestion of contaminated water, milk, vegetables and meat; 3) External exposure from clouds immersion, grounds concentrations and direct gamma radiation. Three computer codes have been used with the object of evaluating the above-mentioned impact. Two of them are well-known NRC (Nuclear Regulatory Commission) codes: RESRAD 6.30 and MILDOS-AREA. We have also applied DOEFLURA, developed in ENUSA [1, 2, 3]. Four scenarios have been studied: Resident Farmer Scenario, Resident scenario, Livestock pasture scenario and Forest scenario, Estimation of radioactive doses for the member of the public in the different scenarios has been calculated with this programme. A period of 3500 years from now has been studied. (author)

  2. Assessing the impact of iron ore mining to the groundwater in Goa, using stable isotopes

    International Nuclear Information System (INIS)

    Arzoo Ansari, Md.; Sinha, U.K.; Mohokar, H.V.; Deodhar, Archana; Mendhekar, G.N.; Jaryal, Ajay

    2017-01-01

    Goa contributes about 50% of the total iron ore exported from the country. Iron ore share is 95% of total mining and quarrying sector in Goa. It represents the second most important industry next to tourism. The iron ore is predominantly mined by opencast mining throughout Goa. The reduction of the forest cover, huge dumps, dust mineral particles, water contamination and health problems are some of the principal harmful effects of extensive mining which is of great concern to the environment. The objective of this study is to assess the impact of iron ore mining to groundwater in downstream side of the mine pits using isotope hydrological techniques

  3. Hypothetical Mine Hunting Sonar - Internal Wave Impact on Performance

    Science.gov (United States)

    2014-12-09

    5e-02 1 OeOO~. ?’•’~~~·0 0 20 40 60 SE dB 80 100 120 Histogrilm of SE45200 FM=174 w=BO 11e-01l 𔃺 5 e-0 2 I n. nUn ~ OeOO -4...question its use as a reliable mine detection system. This signal excess variability study needs to be improved in a number of ways: 1. the impact of...profile and its perturbation by the seasonally changing internal wave fields needs to be addressed and 4. acoustic signal propagation studies focused

  4. DES-ncRNA: A knowledgebase for exploring information about human micro and long noncoding RNAs based on literature-mining

    KAUST Repository

    Salhi, Adil

    2017-04-07

    Noncoding RNAs (ncRNAs), particularly microRNAs (miRNAs) and long ncRNAs (lncRNAs), are important players in diseases and emerge as novel drug targets. Thus, unraveling the relationships between ncRNAs and other biomedical entities in cells are critical for better understanding ncRNA roles that may eventually help develop their use in medicine. To support ncRNA research and facilitate retrieval of relevant information regarding miRNAs and lncRNAs from the plethora of published ncRNA-related research, we developed DES-ncRNA ( www.cbrc.kaust.edu.sa/des_ncrna ). DES-ncRNA is a knowledgebase containing text- and data-mined information from public scientific literature and other public resources. Exploration of mined information is enabled through terms and pairs of terms from 19 topic-specific dictionaries including, for example, antibiotics, toxins, drugs, enzymes, mutations, pathways, human genes and proteins, drug indications and side effects, mutations, diseases, etc. DES-ncRNA contains approximately 878,000 associations of terms from these dictionaries of which 36,222 (5,373) are with regards to miRNAs (lncRNAs). We provide several ways to explore information regarding ncRNAs to users including controlled generation of association networks as well as hypotheses generation. We show an example how DES-ncRNA can aid research on Alzheimer\\'s disease and suggest potential therapeutic role for Fasudil. DES-ncRNA is a powerful tool that can be used on its own or as a complement to the existing resources, to support research in human ncRNA. To our knowledge, this is the only knowledgebase dedicated to human miRNAs and lncRNAs derived primarily through literature-mining enabling exploration of a broad spectrum of associated biomedical entities, not paralleled by any other resource.

  5. DES-ncRNA: A knowledgebase for exploring information about human micro and long noncoding RNAs based on literature-mining

    KAUST Repository

    Salhi, Adil; Essack, Magbubah; Alam, Tanvir; Bajic, Vladan P.; Ma, Lina; Radovanovic, Aleksandar; Marchand, Benoit; Schmeier, Sebastian; Zhang, Zhang; Bajic, Vladimir B.

    2017-01-01

    Noncoding RNAs (ncRNAs), particularly microRNAs (miRNAs) and long ncRNAs (lncRNAs), are important players in diseases and emerge as novel drug targets. Thus, unraveling the relationships between ncRNAs and other biomedical entities in cells are critical for better understanding ncRNA roles that may eventually help develop their use in medicine. To support ncRNA research and facilitate retrieval of relevant information regarding miRNAs and lncRNAs from the plethora of published ncRNA-related research, we developed DES-ncRNA ( www.cbrc.kaust.edu.sa/des_ncrna ). DES-ncRNA is a knowledgebase containing text- and data-mined information from public scientific literature and other public resources. Exploration of mined information is enabled through terms and pairs of terms from 19 topic-specific dictionaries including, for example, antibiotics, toxins, drugs, enzymes, mutations, pathways, human genes and proteins, drug indications and side effects, mutations, diseases, etc. DES-ncRNA contains approximately 878,000 associations of terms from these dictionaries of which 36,222 (5,373) are with regards to miRNAs (lncRNAs). We provide several ways to explore information regarding ncRNAs to users including controlled generation of association networks as well as hypotheses generation. We show an example how DES-ncRNA can aid research on Alzheimer's disease and suggest potential therapeutic role for Fasudil. DES-ncRNA is a powerful tool that can be used on its own or as a complement to the existing resources, to support research in human ncRNA. To our knowledge, this is the only knowledgebase dedicated to human miRNAs and lncRNAs derived primarily through literature-mining enabling exploration of a broad spectrum of associated biomedical entities, not paralleled by any other resource.

  6. DES-ncRNA: A knowledgebase for exploring information about human micro and long noncoding RNAs based on literature-mining.

    Science.gov (United States)

    Salhi, Adil; Essack, Magbubah; Alam, Tanvir; Bajic, Vladan P; Ma, Lina; Radovanovic, Aleksandar; Marchand, Benoit; Schmeier, Sebastian; Zhang, Zhang; Bajic, Vladimir B

    2017-07-03

    Noncoding RNAs (ncRNAs), particularly microRNAs (miRNAs) and long ncRNAs (lncRNAs), are important players in diseases and emerge as novel drug targets. Thus, unraveling the relationships between ncRNAs and other biomedical entities in cells are critical for better understanding ncRNA roles that may eventually help develop their use in medicine. To support ncRNA research and facilitate retrieval of relevant information regarding miRNAs and lncRNAs from the plethora of published ncRNA-related research, we developed DES-ncRNA ( www.cbrc.kaust.edu.sa/des_ncrna ). DES-ncRNA is a knowledgebase containing text- and data-mined information from public scientific literature and other public resources. Exploration of mined information is enabled through terms and pairs of terms from 19 topic-specific dictionaries including, for example, antibiotics, toxins, drugs, enzymes, mutations, pathways, human genes and proteins, drug indications and side effects, mutations, diseases, etc. DES-ncRNA contains approximately 878,000 associations of terms from these dictionaries of which 36,222 (5,373) are with regards to miRNAs (lncRNAs). We provide several ways to explore information regarding ncRNAs to users including controlled generation of association networks as well as hypotheses generation. We show an example how DES-ncRNA can aid research on Alzheimer disease and suggest potential therapeutic role for Fasudil. DES-ncRNA is a powerful tool that can be used on its own or as a complement to the existing resources, to support research in human ncRNA. To our knowledge, this is the only knowledgebase dedicated to human miRNAs and lncRNAs derived primarily through literature-mining enabling exploration of a broad spectrum of associated biomedical entities, not paralleled by any other resource.

  7. Les impacts des énergies fossiles sur l'environnement

    OpenAIRE

    Landrieu , Guy

    1994-01-01

    La satisfaction de leurs besoins en énergie est l'un des principaux facteurs de la transformation de leur environnement par les sociétés industrielles. Les combustibles carbonés fossiles, qui représentent environ 90% de la production commerciale d'énergie dans le monde, ont un rôle important dans ce processus de transformation. Une première donnée qui explique l'ampleur des impacts sur l'environnement liés aux combustibles fossiles est l'importance des flux de matières en circulation. On extr...

  8. Underground black-coal mining and its impact on the land surface

    International Nuclear Information System (INIS)

    Pollmann, H.J.; Wilke, F.L.

    1994-01-01

    This book wants to describe the special requirements and consequences resulting from natural conditions at the deposit as well as from decisions and processes of mining operations. On this basis it should be possible to assess the degree to which the impact of mining on defined areas of the land surface can be influenced with reasonable effort. Furthermore, the consequences from conditions governing mining activities for the planning and realization of mining operations and their impact and the granting of permissions and approvals on the part of the mining authorities are discussed. (HS) [de

  9. Impact of mine wastewaters on greenhouse gas emissions from northern peatlands used for mine water treatment

    Science.gov (United States)

    Palmer, Katharina; Ronkanen, Anna-Kaisa; Klöve, Björn; Hynynen, Jenna; Maljanen, Marja

    2015-04-01

    The amount of wastewaters generated during mining operations is increasing along with the increasing number of operation mines, which poses great challenges for mine water management and purification. Mine wastewaters contain high concentrations of nitrogen compounds such as nitrate (NO3-) and ammonium (NH4+) originating from remnant explosives as well as sulfate (SO42-) originating from the oxidation of sulfidic ores. At a mine site in Finnish Lapland, two natural peatlands have been used for cost-effective passive wastewater treatment. One peatland have been used for the treatment of drainage waters (TP 1), while the other has been used for the treatment of process-based wastewaters (TP 4). In this study, the impact of mine water derived nitrogen compounds as well as SO42- on the emission of the potent greenhouse gases methane (CH4) and nitrous oxide (N2O) from those treatment peatlands was investigated. Contaminant concentrations in the input and output waters of the treatment peatlands were monitored which allowed for the calculation of contaminant-specific retention efficiencies. Treatment peatlands showed generally good retention efficiencies for metals and metalloids (e.g. nickel, arsenic, antimony, up to 98% reduction in concentration) with rather low input-concentrations (i.e., in the μg/l-range). On the other hand, retention of contaminants with high input-concentrations (i.e., in mg/l-range) such as NO3-, NH4+ and SO42- was much lower (4-41%, 30-60% and -42-30%, respectively), indicating the limited capability of the treatment peatlands to cope with such high input concentrations. NO3- and NH4+ concentrations were determined in surface and pore water from TP 4 in July 2013 as well as in surface water from TP 1 and TP 4 in October 2013. Up to 720 μM NO3- and up to 600 μM NH4+ were detected in surface water of TP 4 in July 2013. NO3- and NH4+ concentrations in surface waters were highest near the mine wastewater distribution ditch and decreased with

  10. Selenium transformation in coal mine spoils: Its environmental impact assessment

    Energy Technology Data Exchange (ETDEWEB)

    Harness, J.; Atalay, A.; Koll, K.J.; Zhang, H.; Maggon, D.

    1991-12-31

    The objective of this program was to conduct an environmental impact assessment study for selenium from coal mine spoils. The use of in-situ lysimetry to predict selenium speciation, transformation, and mobility under natural conditions was evaluated. The scope of the study was to construct and test field-scale lysimeter and laboratory mini-column to assess mobility and speciation of selenium in coal mine overburden and soil systems; to conduct soil and groundwater sampling throughout the state of Oklahoma for an overall environmental impact assessment of selenium; and to conduct an in-depth literature review on the solubility, speciation, mobility, and toxicity of selenium from various sources. Groundwater and surface soil samples were also collected from each county in Oklahoma. Data collected from the lysimeter study indicated that selenium in the overburden of the abandoned mine site was mainly found in the selenite form. The amount of selenite found was too low and immobile to be of concern to the environment. The spoil had equilibrated long enough (over 50 years) that most of the soluble forms of selenium have already been lost. Examination of the overburden indicated the presence of pyrite crystals that precipitated over time. The laboratory mini-column study indicated that selenite is quite immobile and remained on the overburden material even after leaching with dilute acid. Data from groundwater samples indicated that based on the current permissible level for selenium in groundwater (0.01 mg Se/L), Oklahoma groundwater is widely contaminated with the element. However, according to the new regulation (0.05 mg Se/L), which is to be promulgated in 1992, only 9 of the 77 counties in the state exceed the limit.

  11. The environmental impact of mine wastes - roles of microorganisms and their significance in treatment of mine wastes

    International Nuclear Information System (INIS)

    Ledin, M.; Pedersen, K.

    1996-01-01

    Mine wastes constitute a potential source of contamination to the environment, as heavy metals and acid are released in large amounts. A great variety of microorganisms has been found in mine wastes and microbiological processes are usually responsible for the environmental hazard created by mine wastes. However, microorganisms can also be used to retard the adverse impact of mine wastes on the environment. Conventionally, the mine drainage as well as the waste itself can be treated with alkali to increase pH and precipitate metals. The main drawback of this method is that it has to be continuously repeated to be fully effective. There may also be negative effects on beneficial microorganisms. Several other treatment methods have been developed to stop weathering processes thereby reducing the environmental impact of mine wastes. The other main approach is to treat the drainage water. Various methods aim at using microorganisms for this in natural or engineered systems. Recently, much interest has been focused on the use of natural or artificial wetlands for treatment. In general, the activity of microorganisms is neglected in the design of mine waste treatment systems, and the treatments are created merely from a technical point of view. This can result in situations where unexpected microbial processes take over, and, in the worst scenario, the overall effect is opposite to the desired

  12. Environmental impact assessment. Ajka Mining and Power Company

    International Nuclear Information System (INIS)

    Sipkema, Arjan; De Visser, Petra

    1994-01-01

    An Environmental Impact Assessment (EIA) is a public document which evaluates the impact of a new company or a new project on the environment and it also lays out the possible alternatives. The present EIA was worked out to get an insight into the polluting effects of the Ajka Mining and Power Company in Ajka, Hungary and to understand what hinders the abatement of the pollution. The Ajka coal has a high sulphur content and is slightly radioactive. The Power Plant is situated in the neighborhood of the town Ajka and the wind usually blows the releases in the direction of the town. The radioactive sludge is also stored at the border of the town and its radioactivity exceeds the limit set for the Paks Power Plant (in Hungary). Alternatives for the present technology are explored. Nil-condensation and/or energy conservation seem to be the best alternatives. Theoretically, the Regional Environmental Inspectorate is responsible for all survey of pollution, which they monitor with their own equipment, with data obtained from the company or from other monitoring companies. However, the pollution of the Ajka Mining and Power Company is not completely monitored. (authors)

  13. Impact de la gestion des ressources humaines sur la survie des ...

    African Journals Online (AJOL)

    A partir d'un indice composite, l'indice de gestion des ressources humaines ... (iv) la gestion de la performance, et (v) la formation et le développement du ... Même si à cause du type d'étude quasi-expérimentale réalisée (avant-après), nous ne ... GRH d'une organisation doit aussi devenir un objectif chiffré du management.

  14. The end of the mining activities. Report for the President of the Republic followed by answers of interested organisms and administrations; La fin des activites minieres. Rapport au President de la Republique suivi des reponses des administrations et des organismes interesses

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-12-01

    During more than 200 years, the coal mining took an important place in the economy. The end of this activity will occur in 2005 in France. So the french Government decided to evaluate, in this report, a retrospective and a prospective on the mining costs, the economic and environmental impacts. Legal aspects and the case of the uranium and the potash mines are also presented. (A.L.B.)

  15. STATE-OF-ART REPORT ABOUT WATER TREATMENT AND ENVIRONMENTAL IMPACTS IN RUSSIAN MINING

    OpenAIRE

    Lysova, Valeriya

    2014-01-01

    Mining industry has a great impact on the environment including aquatic systems. Therefore, efficient water treatment is an important factor for sustainable development of every mining enterprise. The study was done for the Finnish company Measurepolis Development Ltd. with the main aim to examine the current situation of water treatment and environmental impacts in Russian mining industry. The identification of the present needs and problems may help Measurepolis Development Ltd. to enter...

  16. Environmental Impact of Munition and Propellant Disposal (Impact Environnemental de l’Elimination des Munitions et des Combustibles)

    Science.gov (United States)

    2010-02-01

    the Future of Demil 3-29 3.4.2 Poster Session 3-32 3.4.2.1 The Situation in Lithuania: The Studies on the Explosive Contamination, 3-32 Their Toxic...Presentations and Documents Supporting Capability Assessments A-1 Annex B – Presentations, Paper/ Posters and Videos from the Sofia Meeting B-1 Annex C...sur l’environnement. La réunion a inclus des participants provenant de l’OTAN et des partenaires dont la Russie et la Géorgie. Les sessions étaient

  17. Radon impact at a remediated uranium mine site in Japan

    International Nuclear Information System (INIS)

    Ishimori, Yuu

    2011-01-01

    This paper mainly illustrates the radon impact of the closed uranium mine site remediated in 2007. The site remediated is the waste rock site located on the steep slope of a hill about 1.5 km upstream from a residential area along a main ravine. Major remedial action was to cover these waste rock yards with weathering granite soil. The radon flux density after remediation was intended to be 0.1 Bqm -2 s -1 in consideration with the natural background level around Ningyo-toge because there is no value of radon flux density regulated in Japan. Our action decreased the radon concentration in the site to natural background level, approximately from 10 to 40 Bqm -3 , although relatively high concentration in excess of 100 Bqm -3 was observed before remediation. On the other hand, our action did not decrease the radon concentrations around the site in general. This fact proved that the limited source such as waste rocks affected the radon concentrations at neighboring area only. The similar tendencies were also observed in other environmental data such as radon progeny concentrations. In conclusion, these findings proved that our remedial action was successful against radon. This fact will lead to more reasonable action plans for other closed mine sites. (author)

  18. Strategic assessment of the magnitude and impacts of sand mining in Poyang Lake, China

    NARCIS (Netherlands)

    Leeuw, de J.; Shankman, D.; Wu, G.; Boer, de W.F.; Burnham, J.; He, Q.; Yesou, H.; Xiao, J.

    2010-01-01

    Planning for the extraction of aggregates is typically dealt with at a case to case basis, without assessing environmental impacts strategically. In this study we assess the impact of sand mining in Poyang Lake, where dredging began in 2001 after sand mining in the Yangtze River had been banned. In

  19. Environmental impact assessment - baseline noise survey and noise impact assessment for Aurora Mine

    International Nuclear Information System (INIS)

    Yee, S.

    1996-01-01

    A noise impact assessment was conducted at Syncrude's proposed Aurora Mine site to comply with Alberta Energy and Utilities Board (AEUB) Noise Control Directive ID 94-4. Noise assessments were conducted near a major noise source, i.e. the hydraulic and electric shovels. Noise levels at 50 meters away from the source varied from 72.3 to 79.7 dBA. The worst case noise level was 75 dBA measured at 100 meters away from a hydraulic shovel. This assessment was used to calculate the predicted design sound level from a noise source at the nearest or most impacted occupied dwelling. Two cabins located near the access road and along Kearl Lake respectively, were identified as the most impacted and nearest dwellings to the mine site. The predicted sound level at one cabin was 43 dBA, and 55 dBA at the other. Fort McKay was also assessed because it is the nearest community to the mine site. The sound level at Fort McKay was predicted to be 34 dBA. These results indicate that the sound level from Aurora Mine is not in compliance with the AEUB Noise Control Directive. Attenuation measures are required to reduce the noise to acceptable level at Cabin A and B. Predicted sound level at Fort McKay is lower than the permitted sound level

  20. Hydrochemical characteristics of mine waters from abandoned mining sites in Serbia and their impact on surface water quality.

    Science.gov (United States)

    Atanacković, Nebojša; Dragišić, Veselin; Stojković, Jana; Papić, Petar; Zivanović, Vladimir

    2013-11-01

    Upon completion of exploration and extraction of mineral resources, many mining sites have been abandoned without previously putting environmental protection measures in place. As a consequence, mine waters originating from such sites are discharged freely into surface water. Regional scale analyses were conducted to determine the hydrochemical characteristics of mine waters from abandoned sites featuring metal (Cu, Pb-Zn, Au, Fe, Sb, Mo, Bi, Hg) deposits, non-metallic minerals (coal, Mg, F, B) and uranium. The study included 80 mine water samples from 59 abandoned mining sites. Their cation composition was dominated by Ca2+, while the most common anions were found to be SO4(2-) and HCO3-. Strong correlations were established between the pH level and metal (Fe, Mn, Zn, Cu) concentrations in the mine waters. Hierarchical cluster analysis was applied to parameters generally indicative of pollution, such as pH, TDS, SO4(2-), Fe total, and As total. Following this approach, mine water samples were grouped into three main clusters and six subclusters, depending on their potential environmental impact. Principal component analysis was used to group together variables that share the same variance. The extracted principal components indicated that sulfide oxidation and weathering of silicate and carbonate rocks were the primary processes, while pH buffering, adsorption and ion exchange were secondary drivers of the chemical composition of the analyzed mine waters. Surface waters, which received the mine waters, were examined. Analysis showed increases of sulfate and metal concentrations and general degradation of surface water quality.

  1. Tailings From Mining Activities, Impact on Groundwater, and Remediation

    OpenAIRE

    Khalid Al-Rawahy

    2001-01-01

    Effluent wastes from mining operations and beneficiation processes are comprized mostly of the following pollutants: total suspended solids (TTS), alkalinity or acidity (pH), settleable solids, iron in ferrous mining, and dissolved metals in nonferrous mining. Suspended solids consist of small particles of solid pollutants that resist separation by conventional means. A number of dissolved metals are considered toxic pollutants. The major metal pollutants present in ore mining and beneficiati...

  2. Impact on the greenhouse effect of peat mining and combustion

    International Nuclear Information System (INIS)

    Rodhe, H.; Svensson, Bo

    1995-01-01

    Combustion of peat leads to emission of carbon dioxide (CO 2 ) in the atmosphere. In addition, mining of the peat alters the environment such that the natural fluxes of CO 2 and other greenhouse gases are modified. Of particular interest is a reduction in the emission of methane (CH 4 ) in the drained parts of the mires. We estimate the total impact on the greenhouse effect of these processes. The results indicate that the decreased emission of methane from the drained mires compensates for about 15% of the CO 2 emission during the combustion of the peat. It follows that, in a time perspective of less than several hundred years, peat is comparable to a fossil fuel, as far as the contribution to the greenhouse effect is concerned. 39 refs, 1 fig, 4 tabs

  3. Environmental impact of coal mine methane emissions and responding strategies in China

    Energy Technology Data Exchange (ETDEWEB)

    Cheng, Y.P.; Wang, L.; Zhang, X.L. [China University of Mining & Technology, Xuzhou (China)

    2011-01-15

    The impact on global climate change from coal mine methane emissions in China has been drawing attention as coal production has powered its economic development. Data on coal mine methane emissions from the State Administration of Coal Mine Safety of China has been analyzed. It is estimated that the methane emission from coal mining in China reached 20 billions of cubic meters in 2008, most of which comes from state-owned coal mines with high-gas content. China releases six times as much of methane from coal mines as compared to the United States. However, Chinese methane emission from coal production accounts for only a very small proportion on the environmental impact when compared to emissions of carbon dioxide from fossil fuel consumption. The Chinese government has shown environmental awareness and resolution on the mitigation and utilization of coal mine methane emissions. Measures have been taken to implement the programs of mitigation and utilization of coal mine methane, and at the same time, to ensure mining safety. Nearly 7.2 billions of cubic meters of methane were drained from the coal mines, and 32% of it was utilized in 2008. The slow advancement of technologies for the drainage and utilization of low-concentration methane from ventilation air hinders the progress of mitigation of atmospheric methane and the utilization of coal mine methane emissions.

  4. Coal mining and the resource community cycle: A longitudinal assessment of the social impacts of the Coppabella coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Lockie, S.; Franettovich, M.; Petkova-Timmer, V.; Rolfe, J.; Ivanova, G. [CQUniversity of Australia, Rockhampton, Qld. (Australia). Inst. of Health & Social Science Research

    2009-09-15

    Two social impact assessment (SIA) studies of Central Queensland's Coppabella coal mine were undertaken in 2002-2003 and 2006-2007. As ex post studies of actual change, these provide a reference point for predictive assessments of proposed resource extraction projects at other sites, while the longitudinal element added by the second study illustrates how impacts associated with one mine may vary over time due to changing economic and social conditions. It was found that the traditional coupling of local economic vitality and community development to the life cycle of resource projects - the resource community cycle - was mediated by labour recruitment and social infrastructure policies that reduced the emphasis on localised employment and investment strategies. and by the cumulative impacts of multiple mining projects within relative proximity to each other. The resource community cycle was accelerated and local communities forced to consider ways of attracting secondary investment and/or alternative industries early in the operational life of the Coppabella mine in order to secure significant economic benefits and to guard against the erosion of social capital and the ability to cope with future downturns in the mining sector.

  5. Coal mining and the resource community cycle: A longitudinal assessment of the social impacts of the Coppabella coal mine

    International Nuclear Information System (INIS)

    Lockie, Stewart; Franettovich, Maree; Petkova-Timmer, Vanessa; Rolfe, John; Ivanova, Galina

    2009-01-01

    Two social impact assessment (SIA) studies of Central Queensland's Coppabella coal mine were undertaken in 2002-2003 and 2006-2007. As ex post studies of actual change, these provide a reference point for predictive assessments of proposed resource extraction projects at other sites, while the longitudinal element added by the second study illustrates how impacts associated with one mine may vary over time due to changing economic and social conditions. It was found that the traditional coupling of local economic vitality and community development to the life cycle of resource projects-the resource community cycle-was mediated by labour recruitment and social infrastructure policies that reduced the emphasis on localised employment and investment strategies, and by the cumulative impacts of multiple mining projects within relative proximity to each other. The resource community cycle was accelerated and local communities forced to consider ways of attracting secondary investment and/or alternative industries early in the operational life of the Coppabella mine in order to secure significant economic benefits and to guard against the erosion of social capital and the ability to cope with future downturns in the mining sector.

  6. impacts des rejets industriels sur les eaux souterraines

    African Journals Online (AJOL)

    USER

    pollution et sont nombreuses, notamment les usines sidérurgiques, métalliques et pétrochimiques. Leurs rejets ont des effets néfastes sur les eaux de la région. Actuellement, les effluents industriels situés dans la région de Berrahal, contiennent d'importantes quantités de produits chimiques organiques et inorganiques et ...

  7. Hydrochemical and geochemical processes in superficial dump sediments in Zwenkau open brown coal mine; Hydro- und geochemische Prozesse in oberflaechennahen Kippensedimenten des Braunkohlentagebaus Zwenkau

    Energy Technology Data Exchange (ETDEWEB)

    Wiegand, U.

    2002-07-01

    The present study was performed as part of a project titled ''Ground and air-based spectrometric studies for the differentiation of reactively altered brown coal open mining areas in Central Germany'' (Project 02 WB 9667/5) which was funded by the Federal Ministry for Education and Research. It was carried out as a cooperation between GeoForschungszentrum Potsdam (GFZ, Potsdam GeoResearch Centre), Deutsches Zentrum for Lust- und Raumfahrt (DLR, German Aerospace Centre), Gesellschaft fuer Angewandte Fernerkundung (GAF, Society for Applied Remote Sensing) and Umweltforschungszentrum Leipzig/Halle GmbH (UFZ, Leipzig/Halle Environmental Research Centre). The idea of the project was to calibrate aerial data obtained by means of spectrometric remote sensing methods using conventional petrographic, mineralogical and geochemical analysis. This would provide the mining industry with a powerful method with low time and staff requirement for reliably classifying the vast dump areas produced by open pit mining, accurately assigning findings to location data and thus identifying suitable uses for different sites. The focus of the present study was on characterising hydrochemical and geochemical alterations in dump sediments of the Zwenkau brown coal open mining area south of Leipzig in Central Germany. The collection of these data plays a decisive role in plans for cultivating and assessing the potential hazard to the open mining landscape. [German] Die vorliegende Arbeit wurde im Rahmen des BMBF-gefoerderten Projektes 'Luft- und bodengestuetzte spektrometrische Untersuchungen zur Differenzierung reaktiv veraenderter Braunkohlentagebaugebiete in Mitteldeutschland' (Vorhaben 02 WB 9667/5) als Kooperation zwischen dem GeoForschungsZentrum Potsdam (GFZ), dem Deutschen Zentrum fuer Luft- und Raumfahrt (DLR), der Gesellschaft fuer Angewandte Fernerkundung (GAF) und dem Umweltforschungszentrum Leipzig/Halle GmbH (UFZ) angefertigt. Idee des Projektes war

  8. A research for environmental problems in the vicinity of mining area. Investigation into the impact of metallic mining on the environment and solutions

    Energy Technology Data Exchange (ETDEWEB)

    Min, Jeong Sik; Cheong, Young Wook; Lee, Hyun Joo; Song, Duk Young [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of)

    1995-12-01

    This study is focused on the impacts of metalliferous mines on the environment in the vicinity of the abandoned and active mines and establishment of abatements of mining environmental problems. Total number of metalliferous mines surveyed were 40 in which samples of waters, mine wastes and soil were taken. Water parameters such as the pH, Eh, TDS, conductivity, turbidity, dissolved oxygen and temperature were measured in the field. Elements such as As, Cd, Pb, Zn, Cu, Al, Mn, sulfate and cyanide were analyzed. Significant concentrations of heavy metals, mainly Cd, Zn, Cu, Fe, Mn and Al, were found in mine waters from adit and in leachates extracted from mine wastes. The mine waters flowing out from the Dalsung and Ilgwang mines were the typical acid mine drainage(AMD) contaminated by the heavy metals. Passive biological systems(Anoxic wetland) to treat AMD for metals were designed and monitored for effluents from the reactors with 4 types of composts, cow manure and limestones, Results showed that the mushroom compost with cow manure and limestone was the best substrates in metal removing efficiencies. Results from leaching of mine wastes showed that As, Cd and Cu were extracted from some of mine wastes. AMD from the mine waste dump of the Daduk mine was found. These mean that mine wastes can contaminate the soil, surface water and ground waters in vicinity of mines. Therefore cover systems or liner system for containments of mine wastes were suggested to preserve the environment. Cu and As concentrations in soils surveyed were below the heavy metal concentrations in soils of Korean standard preventing plant of the crops. However, most of the acid mine waters are drained untreated, and mine wastes with heavy metals are distributed near soil environment. Therefore efforts to reduce possibilities of soil contamination in the vicinity of mining areas is required. (author). 33 refs.

  9. Mining

    Directory of Open Access Journals (Sweden)

    Khairullah Khan

    2014-09-01

    Full Text Available Opinion mining is an interesting area of research because of its applications in various fields. Collecting opinions of people about products and about social and political events and problems through the Web is becoming increasingly popular every day. The opinions of users are helpful for the public and for stakeholders when making certain decisions. Opinion mining is a way to retrieve information through search engines, Web blogs and social networks. Because of the huge number of reviews in the form of unstructured text, it is impossible to summarize the information manually. Accordingly, efficient computational methods are needed for mining and summarizing the reviews from corpuses and Web documents. This study presents a systematic literature survey regarding the computational techniques, models and algorithms for mining opinion components from unstructured reviews.

  10. Impacts of surface gold mining on land use systems in Western Ghana.

    Science.gov (United States)

    Schueler, Vivian; Kuemmerle, Tobias; Schröder, Hilmar

    2011-07-01

    Land use conflicts are becoming increasingly apparent from local to global scales. Surface gold mining is an extreme source of such a conflict, but mining impacts on local livelihoods often remain unclear. Our goal here was to assess land cover change due to gold surface mining in Western Ghana, one of the world's leading gold mining regions, and to study how these changes affected land use systems. We used Landsat satellite images from 1986-2002 to map land cover change and field interviews with farmers to understand the livelihood implications of mining-related land cover change. Our results showed that surface mining resulted in deforestation (58%), a substantial loss of farmland (45%) within mining concessions, and widespread spill-over effects as relocated farmers expand farmland into forests. This points to rapidly eroding livelihood foundations, suggesting that the environmental and social costs of Ghana's gold boom may be much higher than previously thought.

  11. Analysis of the planned post-mining landscape of MIBRAG's open-cast mines with regard to a possible environmental impact of alteration processes in mixed dumps

    International Nuclear Information System (INIS)

    Jolas, P.; Hofmann, B.

    2010-01-01

    There has been an increasing body of knowledge with regard to hydro- and geochemical alteration processes in overburden dumps and their impact on groundwater quality in lignite mining and reclamation operations associated with post-mining landscapes in Germany. The operators of the MIBRAG mines have examined issues regarding alteration processes and how they affect the environment and which opportunities exist to actively influence the dumping process. The objectives were to counteract any possible negative impact of the alteration processes. Special emphasis was on the impact caused by oxidation of sulfur containing minerals. This paper presented an analysis of the situation at United Schleenhain Mine and how it reflects on the work to date for MIBRAG's mines. A future outlook was also presented. Specifically, the paper discussed the development of the United Schleenhain mine and the post-mining landscape. The potential for discharge of substances was also evaluated along with acidification. 1 tab., 5 figs.

  12. Mine tailings dams: Characteristics, failure, environmental impacts, and remediation

    International Nuclear Information System (INIS)

    Kossoff, D.; Dubbin, W.E.; Alfredsson, M.; Edwards, S.J.; Macklin, M.G.; Hudson-Edwards, K.A.

    2014-01-01

    , environmental impacts, and remediation of mine tailings dam failures

  13. Baseline requirements for assessment of mining impact using biological monitoring

    International Nuclear Information System (INIS)

    Humphrey, C.L.; Dostine, P.L.

    1995-01-01

    Biological monitoring programmes for environmental protection should provide for both early detection of possible adverse effects, and assessment of the ecological significance of these effects. Monitoring techniques are required that include responses sensitive to the impact, that can be subjected to rigorous statistical analysis and for which statistical power is high. Such issues in baseline research of 'what and how to measure?' and 'for how long?' have been the focus of a programme being developed to monitor and assess effects of mining operations on the essentially pristine, freshwater ecosystems of the Alligator Rivers Region (ARR) in tropical northern Australia. Application of the BACIP (Before, After, Control, Impact, Paired differences) design, utilizing a form of temporal replication, to univariate (single species) and multivariate (community) data is described. The BACIP design incorporates data from single control and impact sites. We argue for modification of the design for particular studies conducted in streams, to incorporate additional independent control sites from adjacent catchment. Inferential power, by way of (i) more confidently attributing cause to an observed change and (ii) providing information about the ecological significance of the change, will be enhanced using a modified BACIP design. In highly valued environments such as the ARR, monitoring programmes require application of statistical tests with high power to guarantee that an impact no greater than a prescribed amount has gone undetected. A minimum number of baseline years using the BACIP approach would therefore be required in order to achieve some desired level of statistical power. This paper describes the results of power analyses conducted on 2-5 years (depending upon the technique) of baseline data from streams of the ARR and discuss the implications of these results for management. 44 refs., 1 tab., 3 figs

  14. Preliminary environmental impact statement for the Kvanefjeld Uranium Mine

    International Nuclear Information System (INIS)

    Pilegaard, K.

    1990-09-01

    The sources of pollution from a proposed uranium mining and milling complex at Kvanefjeld in South Greenland have been evaluated. The environmental impact assessment was part of a pre-feasibility study. The main aims of this study have been to identify potential pollutants and critical pathways, to evaluate the environmental impact of technical alternatives, and to provide guide-lines for pre-operational environmental studies. The study has identified the open pit, waste dump and tailings impoundment as the most important sources of pollution. The mobility of non-radioactive elements was lower in the tailings than in the ore, whereas the reverse was true for the radioactive elements. The potential pollutants include: Be, F, V, Cr, Mn, Fe, Co, Ni, Zn, As, Se, Rb, Nb, Zr, Mo, Cd, Sb, REE, Hg, Pb, Th, U, Ra-226, Pb-210 and Po-210. This list was based on abundance and mobility in the ore and tailings and general toxicity of the elements. Fluorine is the most mobile of the elements in both ore and tailings. The concentration in ore and tailings may be up to 1% and in combination with its high toxicity, F can then be regarded as the most serious pollutant. (author) 34 tabs., 32 ills., 63 refs

  15. Impact, en ce qui a trait à l'économie et à la santé, des politiques ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Cette recherche évaluera l'effet des politiques fiscales et législatives sur l'état nutritionnel des Sud-Africains et recommandera d'importantes modifications aux politiques. La plus récente étude nationale sur la charge de morbidité (2000) a mesuré l'impact des MNT à la lumière de divers indicateurs tels que le coût financier, ...

  16. Environmental considerations. Environmental impacts of uranium mining in South Texas

    International Nuclear Information System (INIS)

    Kallus, M.F.

    1977-01-01

    Recent investigations of uranium mining and milling activities in the Grants Mineral Belt of New Mexico revealed serious environmental problems associated with these activities. An investigation was undertaken in the South Texas Uranium Belt to determine whether or not similar or other environmental problems existed. The study describes: (1) the history of uranium mining and milling in South Texas, (2) the area economy and demography, (3) the occurrence of uranium ore and (4) the regulatory aspects of uranium mining and milling in South Texas. The commercial recovery and processing of uranium in this area is described in some detail. Exploration, open pit mining, in-situ solution mining and processing techniques for ''yellowcake'' (U 3 O 8 ), the uranium product of the area, are discussed. The state and federal regulations pertinent to uranium mining and milling are summarized. Finally, the environmental effects of these activities are discussed and conclusions and recommendations are drawn

  17. GIS-based Analysis of LS Factor under Coal Mining Subsidence Impacts in Sandy Region

    Directory of Open Access Journals (Sweden)

    W. Xiao

    2014-09-01

    Full Text Available Coal deposits in the adjacent regions of Shanxi, Shaanxi, and Inner Mongolia province (SSI account for approximately two-thirds of coal in China; therefore, the SSI region has become the frontier of coal mining and its westward movement. Numerous adverse impacts to land and environment have arisen in these sandy, arid, and ecologically fragile areas. Underground coal mining activities cause land to subside and subsequent soil erosion, with slope length and slope steepness (LS as the key influential factor. In this investigation, an SSI mining site was chosen as a case study area, and 1 the pre-mining LS factor was obtained using a digital elevation model (DEM dataset; 2 a mining subsidence prediction was implemented with revised subsidence prediction factors; and 3 the post-mining LS factor was calculated by integrating the pre-mining DEM dataset and coal mining subsidence prediction data. The results revealed that the LS factor leads to some changes in the bottom of subsidence basin and considerable alterations at the basin’s edges of basin. Moreover, the LS factor became larger in the steeper terrain under subsidence impacts. This integrated method could quantitatively analyse LS changes and spatial distribution under mining impacts, which will benefit and provide references for soil erosion evaluations in this region

  18. Review : Pollution due to Coal Mining Activity and its Impact on Environment

    OpenAIRE

    Andi Arif Setiawan; Dedik Budianta; Dwi Putro Priadi; Suheryanto

    2018-01-01

    Utilization of natural resources in the form of coal mines has a positive impact on economic and energy development, in addition to coal mining activities have a negative impact on the environment that result in environmental pollution in soil, water, and air. Pollution begins when clearing land, taking exploitation, transporting, stockpile and when the coal is burned. When land clearing causes damage to forest ecosystems. At the time of exploitation impact on air pollution by coal dust parti...

  19. Post-mining safety implementations and environmental aspects of abandoned mine sites in Limousin. 2006 status (and perspectives 2007); Mises en securite en apres-mine et aspects environnementaux des anciens sites miniers en Limousin. Bilan 2006 (et perspectives 2007)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This document summarizes the actions carried out in 2006 at some French abandoned mine sites: 1 - safety implementations and risks abatement in the framework of post-mining actions: coal mines of Ahun (23) and Argentat (19), antimony mines of Biard (87); 2 - remedial actions at the tin/tungsten mine of Puy-les-Vignes (87) and at the gold mine of Chatelet (23); 3 - 2007 post-mining perspectives; 4 - environmental aspects of abandoned mine sites: gold mines of Chatelet (23), Cheni and Bourneix (87), uranium mines of Haute-Vienne (expertise, control of effluents, financial warranties about tailings storage sites maintenance). (J.S.)

  20. Assessment of the impacts of gold mining on soil and vegetation in Brownsberg Nature Park, Suriname

    NARCIS (Netherlands)

    Arets, E.J.M.M.; Meer, van der P.J.; Brink, van den N.W.; Tjon, K.; Atmopawiro, V.P.; Ouboter, P.E.

    2006-01-01

    This report describes the assessment of the impacts of small scale gold-mining on soil and vegetation in Brownsberg Nature Park. In the past 10 years small-scale gold mining with heavy machinery has been illegally practiced within Brownsberg Nature Park (BNP). During this process the vegetation and

  1. Mathematical model for water quality impact assessment and its computer application in coal mine water

    International Nuclear Information System (INIS)

    Sundararajan, M.; Chakraborty, M.K.; Gupta, J.P.; Saxena, N.C.; Dhar, B.B.

    1994-01-01

    This paper presents a mathematical model to assess the Water Quality Impact in coal mine or in river system by accurate and rational method. Algorithm, flowchart and computer programme have been developed upon this model to assess the quality of coal mine water. 3 refs., 2 figs., 2 tabs

  2. Impacts of gold mine waste disposal on a tropical pelagic ecosystem

    International Nuclear Information System (INIS)

    Brewer, D.T.; Morello, E.B.; Griffiths, S.; Fry, G.; Heales, D.; Apte, S.C.; Venables, W.N.; Rothlisberg, P.C.; Moeseneder, C.; Lansdell, M.; Pendrey, R.; Coman, F.

    2012-01-01

    Highlights: ► We investigate the impact of gold mine tailings disposal into the sea. ► We use a comparative impact-control approach. ► Similar abundance and diversity of zooplankton and micronekton at mine and control. ► High metal concentrations and biomagnification evident in lower trophic levels only. ► No differences in metal concentrations of fish at mine and control. - Abstract: We used a comparative approach to investigate the impact of the disposal of gold mine tailings into the ocean near the Lihir mine (Niolam Island, Papua New Guinea). We found abundance and diversity of zooplankton, micronekton and pelagic fish to be similar or higher in the mine region compared to the reference site. We also found relatively high trace metal concentrations in lower trophic level groups, especially zooplankton, near the mine discharge, but few differences in tissue concentrations of micronekton, baitfish and pelagic fish between the two regions. Biomagnification of some trace metals by micronekton, and of mercury by fish was evident in both regions. We conclude that ocean mine waste disposal at Niolam Island has a local impact on the smaller and less mobile pelagic communities in terms of trace metal concentrations, but has little effect on the abundance and biodiversity of the local food web.

  3. Bâle 3 : Quels impacts sur le financement des pays émergents ?

    OpenAIRE

    Figuet, Jean-Marc; Humblot, Thomas; Lahet, Delphine

    2013-01-01

    La persistance de crises bancaires démontre l'incapacité des établissements de crédit à s'autoréguler. De ce fait, le Comité de Bâle étend largement le périmètre de la nouvelle règlementation prudentielle. Sur la base de la littérature sur les déterminants des flux de capitaux transfrontières et d'un GMM système, cet article analyse l'impact potentiel de l'accord Bâle 3 sur les flux de capitaux bancaires provenant des banques de 16 pays industrialisés à destination d'un panel de 30 pays émerg...

  4. Impacts of gold mine waste disposal on deepwater fish in a pristine tropical marine system

    International Nuclear Information System (INIS)

    Brewer, D.T.; Milton, D.A.; Fry, G.C.; Dennis, D.M.; Heales, D.S.; Venables, W.N.

    2007-01-01

    Little is known about the impacts of mine waste disposal, including deep-sea tailings, on tropical marine environments and this study presents the first account of this impact on deepwater fish communities. The Lihir gold mine in Papua New Guinea has deposited both excavated overburden and processed tailings slurry into the coastal environment since 1997. The abundances of fish species and trace metal concentrations in their tissues were compared between sites adjacent to and away from the mine. In this study (1999-2002), 975 fish of 98 species were caught. Significantly fewer fish were caught close to the mine than in neighbouring regions; the highest numbers were in regions distant from the mine. The catch rates of nine of the 17 most abundant species were lowest, and in three species were highest, close to the mine. There appears to be limited contamination in fish tissues caused by trace metals disposed as mine waste. Although arsenic (several species) and mercury (one species) were found in concentrations above Australian food standards. However, as in the baseline (pre-mine) sampling, it appears they are accumulating these metals mostly from naturally-occurring sources rather than the mine waste

  5. Factors defining value and direction of thermal pressure between the mine shafts and impact of the general mine natural draught on ventilation process of underground mining companies

    Science.gov (United States)

    Nikolaev, A. V.; Alymenko, N. I.; Kamenskikh, A. A.; Alymenko, D. N.; Nikolaev, V. A.; Petrov, A. I.

    2017-10-01

    The article specifies measuring data of air parameters and its volume flow in the shafts and on the surface, collected in BKPRU-2 (Berezniki potash plant and mine 2) («Uralkali» PJSC) in normal operation mode, after shutdown of the main mine fan (GVU) and within several hours. As a result of the test it has been established that thermal pressure between the mine shafts is active continuously regardless of the GVU operation mode or other draught sources. Also it has been discovered that depth of the mine shafts has no impact on thermal pressure value. By the same difference of shaft elevation marks and parameters of outer air between the shafts, by their different depth, thermal pressure of the same value will be active. Value of the general mine natural draught defined as an algebraic sum of thermal pressure values between the shafts depends only on the difference of temperature and pressure of outer air and air in the shaft bottoms on condition of shutdown of the air handling system (unit-heaters, air conditioning systems).

  6. Impact of ICRP-60 on the operation of underground mines

    International Nuclear Information System (INIS)

    Hussein, A.Z.; Hussein, M.I.

    2001-01-01

    Reduction of occupational exposure from: 50 mSv to 20 mSv per annum for uranium miners faces difficulties. For miners this affects the gamma radiation dose and ALI's except radon gas and its short lived daughters of Uranium and Thorium whereas the ICRP planned to review radon daughters exposure limits. New dose limits introduce other mines, e.g. phosphate mines, to be considered as occupational areas. Reclassification of radiation workers has to be done; control, licensing, cost, Gamma dose rate is influenced by the grade and type of ore body and the mining method. The primary mode of radionuclide intake in the mine environment is inhalation, however, ventilation is the principal control of airborne dust. The current average radon daughters dose rate in several underground mines among those are phosphate mines in Egypt is well above 20 mSv/a. Recorded values of Egyptian phosphate mines are more than 1 WL of radon daughters (1WL = 62 uSv/h) considering 2000 h/y, therefore, the annual dose = 124 mSv/a. Mining method dictated by location, size and shape of ore body, hydrology. Priority is given for conventional safety of work place, e.g. rock collapse as well as care of economics of the process and mine development. It is well defined that the control of gamma radiation dose is very much dependent upon the geometry of ore body. Shielding of ore trucks could not be justified (fuel consumption and its pollution). Bulk ore handling method may reduce gamma doses but it generates dust which may increase inhalation doses of long lived alpha emitters. Ventilation is the principal method to control inhalation hazards of dust and radon daughters, but high rates of ventilation has reverse effects of generating more dust and drying wet surfaces of ores. Accordingly, reduction in radon daughters exposure will result in high cost of production. In Egypt radon and thoron (risk/problems) are previously monitored in phosphate mines (upper Egypt). Values greater than 1 WL were

  7. ENVIRONMENTAL IMPACT ASSESSMENT OF LAND USE PLANING AROUND THE LEASED LIMESTONE MINE USING REMOTE SENSING TECHNIQUES

    Directory of Open Access Journals (Sweden)

    P. Ranade

    2007-01-01

    Full Text Available Mining activities and the waste products produced can have significant impact on the surrounding environment - ranging from localized surface and ground water contamination to the damaging effects of airborne pollutants on the regional ecosystem. The long term monitoring of environmental impacts requires a cost effective method to characterize land cover and land cover changes over time. As per the guidelines of Ministry of Environment and Forest, Govt. of India, it is mandatory to study and analyze the impacts of mining on its surroundings. The use of remote sensing technology to generate reliable land cover maps is a valuable asset to completing environmental assessments over mining affected areas. In this paper, a case study has been discussed to study the land use – land cover status around 10 Km radius of open cast limestone mine area and the subsequent impacts on environmental as well as social surroundings.

  8. Managing environmental and health impacts of uranium mining

    International Nuclear Information System (INIS)

    Cameron, Ron; Vance, Robert

    2014-01-01

    Producing uranium in a safe and environmentally responsible manner is not only important to the producers and consumers of the product, but to society at large. Given the projected growth in nuclear generating capacity expected in the coming decades, particularly in the developing world, awareness of leading practice uranium mining needs to be increased globally. This report provides a non-technical overview of the driving forces behind and the outcomes of the significant evolution of uranium mining practices from the time that uranium was first mined for military purposes during the Cold War until today. (authors)

  9. Socio-economic impact analysis: Centralia mine fire abatement alternatives. Draft report

    Energy Technology Data Exchange (ETDEWEB)

    1980-11-07

    The overall purpose of information contained in the following text is to document the likely social and economic impacts upon the Borough of Centralia through implementation of various mine fire abatement alternatives. Much of the data presented herein and utilized in preparing conclusions and recommendations have been derived from those individuals whose lives are now, or may eventually be, impacted by the underground mine fire.

  10. Monitoring the impact of simulated deep-sea mining in Central Indian Basin

    Digital Repository Service at National Institute of Oceanography (India)

    Sharma, R.; Nath, B.N.; Jaisankar, S.

    Monitoring the Impact of Simulated Deep-sea Mining in Central Indian Basin R. SHARMA, B. NAGENDER NATH, AND S. JAI SANKAR National Institute of Oceanography, Dona Paula, Goa, India Monitoring of deep-sea disturbances, natural or man-made, has gained... has shown a partial recovery of the benthic ecosystem, with indications of restoration and recolonization. Keywords deep-sea mining, environmental impact, Central Indian Basin Deep-sea mineral deposits such as the polymetallic nodules and crusts...

  11. 77 FR 4360 - Notice of Availability of the Draft Environmental Impact Statement for the Hycroft Mine Expansion...

    Science.gov (United States)

    2012-01-27

    ... would increase the mine life by approximately 12 years and increase employment to approximately 537 mine... during a 90-day scoping period. The comments stated concerns about lighting impacts to night skies and...

  12. A Framework for Assessing the Impacts of Mining Development on Regional Water Resources in Colombia

    Directory of Open Access Journals (Sweden)

    Neil McIntyre

    2018-03-01

    Full Text Available Developing its large-scale mining industry is an economic priority for Colombia. However, national capacity to assess and manage the water resource impacts of mining is currently limited. This includes lack of baseline data, lack of suitable hydrological models and lack of frameworks for evaluating risks. Furthermore, public opposition to large scale mining is high and is a barrier to many proposed new mining projects mainly because of concerns about impacts on water resources. There are also concerns about impacts on the uplands that are important water sources, particularly the páramo ecosystem. This paper argues the case for a new framework for Strategic Assessment of Regional Water Impacts of Mining, aiming to support land use planning decisions by government for selected mining and prospective mining regions. The proposed framework is modelled on the Australian Government’s Bioregional Assessments program, converted into seven stages plus supporting activities that meet the Colombian development context. The seven stages are: (1 Contextual information; (2 Scenario definition; (3 Risk scoping; (4 Model development; (5 Risk analysis; (6 Database development; and (7 Dissemination by government to stakeholders including the general public. It is emphasised that the process and results should be transparent, the data and models publicly accessible, and dissemination aimed at all levels of expertise.

  13. Land Use and River Degradation Impact of Sand and Gravel Mining

    Science.gov (United States)

    Syah, Putra Rizal Ichsan; Hartuti, Purnaweni

    2018-02-01

    Sand and gravel mining is aimed at providing materials for infrastructure development, as well as providing economical source to the miners. However, the impacts of sand and gravel mining could also cause disturbances to ecological balance, since it is closely related to land use change and river degradation, besides causing conflicts in the miners, the government, and the private relationship. Therefore the government regulation and proper supervision are needed to preserve the ecological balance and decreasing the negative impacts of this mining, and therefore guarantee sustainable development.

  14. From Rum Jungle to Wismut - Reducing the environmental impact of uranium mining and milling

    International Nuclear Information System (INIS)

    Zuk, W.M.; Jeffree, R.A.; Levins, D.M.; Lowson, R.T.; Ritchie, A.I.M.

    1994-01-01

    Australia has a long history of uranium mining. In the early days, little attention was given to environmental matters and considerable pollution occurred. ANSTO has been involved in rehabilitation of a number of the early uranium mining sites, from Rum Jungle in Australia's Northern Territory to Wismut in Germany, and is working with current producers to minimise the environmental impact of their operations. ANSTO's expertise in amelioration of acid mine drainage, radon measurements and control, treatment of mill wastes, management of tailings, monitoring of seepage plumes, mathematical modelling of pollutant transport and biological impacts in a tropical environment are summarized. 17 refs., 3 figs

  15. Study on environmental impact assessment of uranium mining and milling base planning

    International Nuclear Information System (INIS)

    Liu Xiaochao; Song Liquan

    2008-01-01

    Environmental impact assessment (EIA) of project planning is part of strategic EIA, which provides full consideration and evaluation of the potential environmental impact on tiered basis in the process of plan implementation. With account being taken of EIA of uranium mining/milling base and the current situation of mining/milling industry, this paper determined environmental protection objectives of EIA, screened assessment indexes and identified weighting factors. Based on the characteristics of mines planned, restrictive score values are estimated each for EIA weighting factor. Finally some suggestions were made for adjusting the plan. (authors)

  16. An assessment of the radiological impact of uranium mining in northern Saskatchewan

    International Nuclear Information System (INIS)

    1986-06-01

    This report presents the findings of a study which investigated the regional radiological impact of uranium mining in northern Saskatchewan. The study was performed by IEC Beak Consultants Ltd. under a contract awarded by Environment Canada in partnership with the Atomic Energy Control Board. This preliminary assessment suggests there is a negligible combined regional radiological impact from simultaneous operation of the three operating mines investigated as part of the present study. The mines are spaced too far apart for any superposition of emissions to be significantly greater than a small fraction of background levels. The most exposed individual not directly associated with any of the mining operations is estimated to receive a total radiation dose equal to about 3% of the dose due to natural background radiations. This increment is equivalent to the increment in natural background that would be received by an individual moving from Vancouver to Wollaston Post, before mining began in the area, as a result of reduced atmospheric shielding from cosmic radiation. Radiological impacts on biota are estimated to have insignficant effects on natural populations in all cases. However, since the study only investigates the effects of operational releases of radionuclides, the results do not imply that uranium mining developments will or will not have significant long-term radiological impact on northern Saskatchewan. Radiological impact assessments described in this report are estimates only. There are some uncertainties in the available data and modelling methodology. The radiological impact of abandoned tailings areas was not included in this study

  17. L'impact des TIC mobiles sur les activités des professionnels en entreprise

    OpenAIRE

    Besseyre Des Horts , Charles-Henri; Isaac , Henri

    2006-01-01

    It is widely recognized that ICT have modified organizational structures and processes duringthe last decade, notably with the general usage of laptop computers and mobile phones. Anumber of research works have pointed out the deep transformation of work situationsallowed by these technologies with the development of more autonomy and responsibility.However, in the case of mobile technologies, the impact of these technologies onprofessionals' work situations appears to be far more paradoxical...

  18. Summary of environmental impact assessment for the Syncrude Canada Ltd. Aurora Mine

    International Nuclear Information System (INIS)

    1996-01-01

    A summary of the environmental impact assessment for the Syncrude's proposed Aurora Mine was provided. Two mining areas will be opened. Aurora Mine North, located on oil sands leases 10, 12 and 34 will open first followed by the opening of Aurora Mine South, located on Lease 31. Each mining area will contain two extraction facilities, each capable of producing 6.25 million cubic metres of bitumen per year for a total annual capacity of 25 million cubic metres. The areas of land that will be disturbed by development of the Aurora Mines will total 15,171 hectares. The preferred pipeline, roadway and utility corridor and river crossing to be used for the Mine are shown. Production of SO 2 and NO x emissions from the Aurora Mine is expected to be very low, nevertheless, the cumulative effects of emissions from the mines will be addressed in the context of emissions from the existing or proposed oil sand facilities in the area. 7 tabs., 15 figs

  19. The current environmental impact of base-metal mining at the Tui Mine, Te Aroha, New Zealand

    International Nuclear Information System (INIS)

    Sabti, H.; Hossain, M.M.; Brooks, R.R.; Stewart, R.B.

    2000-01-01

    The current environmental impact of base metal mining at the Tui Mine, Te Aroha and gold mining near Waihi, was investigated by analysis of local waters, stream sediments and aquatic vegetation. X-ray diffraction analysis of heavy metal fractions in stream sediments showed the presence of pyrite in the upper reaches of the Tunakohoia and Tui streams that drain the mineralised reefs and Tui tailings dam. Relatively immobile lead (galena) was retained close to the source, whereas copper and zinc minerals were more mobile and distributed further downstream from the areas of mineralisation. Gold was determined in sediments from the Ohinemuri and Waitekauri Rivers along with other heavy metals derived from sulphide mineralisation at Waihi and Waitekauri. Analysis of waters from the Tui and Tunakohoia streams showed concentrations of arsenic, cadmium, lead and zinc above recommended levels for potable water in the upper parts of these waterways. The discharge of these streams into the Waihou River (sampled upstream from Te Aroha and downstream past Paeroa) did not have any significant effect on heavy-metal concentrations in this river. Aquatic macrophytes sampled in the Waihou, Ohinemuri and Waitekauri Rivers had very high heavy-metal concentrations compared with the ambient water and should be considered as potentially useful for assessing the impact of low-metal fluxes into the waters. Gold was detected in aquatic marcophytes from streams draining both the Martha Mine at Waihi and the Golden Cross Mine at Waitekauri and indicated the possibility of prospecting for gold by analysis of these plants. (author). 17 refs., 3 figs., 6 tabs

  20. Image of mining impacts future of US industry

    International Nuclear Information System (INIS)

    Beebe, R.R.

    1993-01-01

    The US mining industry has taken its licks over the years but remains economically viable and able to meet global demands, says R.R. Beebe, a retired executive with Homestake Mining Company in San Francisco. Despite a new-found environmental sensitivity, one of the industry's major problems is its negative public image, Beebe admits. open-quotes Mining's record of environmental insensitivity and demands for low-cost access to public lands has burdened an industry now largely committed to doing business fairly, responsibly, and with minimum environmental disturbance,close quotes he asserts. Another part of its image problem deals with the place of mining in the economic scheme of things. Too many people view mining as a open-quotes sunset industry,close quotes he says, making it difficult for the industry to get a fair hearing on the public stage. open-quotes Even the industry's top executives seem to prefer a low profile, rarely serving in government posts...and almost never seeking public platforms from which to expound their views,close quotes Beebe complains. The size of the US mining industry and the importance of the minerals it supplies to domestic industry make it a significant contributor to the nation's standard of living, Beebe emphasizes. This makes it an industry worth saving

  1. Tailings From Mining Activities, Impact on Groundwater, and Remediation

    Directory of Open Access Journals (Sweden)

    Khalid Al-Rawahy

    2001-12-01

    Full Text Available Effluent wastes from mining operations and beneficiation processes are comprized mostly of the following pollutants: total suspended solids (TTS, alkalinity or acidity (pH, settleable solids, iron in ferrous mining, and dissolved metals in nonferrous mining. Suspended solids consist of small particles of solid pollutants that resist separation by conventional means. A number of dissolved metals are considered toxic pollutants. The major metal pollutants present in ore mining and beneficiation waste waters include arsenic, cadmium, copper, lead, mercury, nickel, and zinc. Tailings ponds are used for both the disposal of solid waste and the treatment of waste-water streams. The supernatant decanted from these ponds contains suspended solids and, at times, process reagents introduced to the water during ore beneficiation. Leakage of material from tailings pond into groundwater is one possible source of water pollution in the mining industry. Percolation of waste-water from impoundment may occur if tailings ponds are not properly designed. This paper addresses potential groundwater pollution due to effluent from mining activities, and the possible remediation options.

  2. Water quality impacts from mining in the Black Hills, South Dakota, USA

    International Nuclear Information System (INIS)

    Rahn, P.H.; Davis, A.D.; Webb, C.J.; Nichols, A.D.

    1996-01-01

    The focus of this research was to determine if abandoned mines constitute a major environmental hazard in the Black Hills. Many abandoned gold mines in the Black Hills contribute acid and heavy metals to streams. In some areas of sulfide mineralization local impacts are severe, but in most areas the impacts are small because most ore deposits consist of small quartz veins with few sulfides. Pegmatite mines appear to have negligible effects on water due to the insoluble nature of pegmatite minerals. Uranium mines in the southern Black Hills contribute some radioactivity to surface water, but he impact is limited because of the dry climate and lack of runoff in that area. 26 refs

  3. Impact of acid mine drainage from mining exploitations on the Margajita River basin and the Hatillo reservoir (Dominican Republic)

    International Nuclear Information System (INIS)

    Grandia, F.; Salas, J.; Arcos, D.; Archambault, A.; Cottard, F.

    2009-01-01

    Mining of the Pueblo Viejo high-sulphidation epithermal deposit (Dominican Republic) leads to environmental impact due to the formation of acid mine drainage associated with the oxidative dissolution of sulphides and sulpho salts. In addition to the very low pH, the acid waters are capable of transporting away from the mining areas high concentrations of metals and metalloids in solution. In the present work, a geochemical study of sediments deposited in the Hatillo reservoir is carried out. This reservoir is fed by the Margajita and Yuna streams which transport leachates from the Pueblo Viejo and Falcondo-Bonao (Cr-Ni) mining areas, respectively. The results show that these sediments have very high concentrations of Fe, Al and sulphate, along with significant amounts of As, Zn and Te, which are of especial environmental concern. The main contributor to this metal discharge into the reservoir is the Margajita stream, whereas the Yuna stream does not transport significant amounts of metals in solution due to its neutral pH, although it is likely that metals such as Mn, Cr, Ni and Co can be mobilised as a particulate. (Author) 5 refs.

  4. The expected impacts of mining : Stakeholder perceptions of a proposed mineral sands mine in rural Australia

    NARCIS (Netherlands)

    Plank, van der S.; Walsh, B.; Behrens, P.A.

    2016-01-01

    The form and evolution of stakeholder perceptions toward renewable energy (RE) developments continue to be investigated, but there has been little similar research regarding mines. Responses of community members and other stakeholders cannot be expected to evolve the same way between different

  5. Deep Impact: Effects of Mountaintop Mining on Surface Topography, Bedrock Structure, and Downstream Waters.

    Science.gov (United States)

    Ross, Matthew R V; McGlynn, Brian L; Bernhardt, Emily S

    2016-02-16

    Land use impacts are commonly quantified and compared using 2D maps, limiting the scale of their reported impacts to surface area estimates. Yet, nearly all land use involves disturbances below the land surface. Incorporating this third dimension into our estimates of land use impact is especially important when examining the impacts of mining. Mountaintop mining is the most common form of coal mining in the Central Appalachian ecoregion. Previous estimates suggest that active, reclaimed, or abandoned mountaintop mines cover ∼7% of Central Appalachia. While this is double the areal extent of development in the ecoregion (estimated to occupy mines extend 10s to 100s of meters below the current land surface. Here, we provide the first estimates for the total volumetric and topographic disturbance associated with mining in an 11 500 km(2) region of southern West Virginia. We find that the cutting of ridges and filling of valleys has lowered the median slope of mined landscapes in the region by nearly 10 degrees while increasing their average elevation by 3 m as a result of expansive valley filling. We estimate that in southern West Virginia, more than 6.4km(3) of bedrock has been broken apart and deposited into 1544 headwater valley fills. We used NPDES monitoring datatsets available for 91 of these valley fills to explore whether fill characteristics could explain variation in the pH or selenium concentrations reported for streams draining these fills. We found that the volume of overburden in individual valley fills correlates with stream pH and selenium concentration, and suggest that a three-dimensional assessment of mountaintop mining impacts is necessary to predict both the severity and the longevity of the resulting environmental impacts.

  6. Mitigation of social and environmental impacts resulting from final closure of uranium mines

    International Nuclear Information System (INIS)

    Cipriani, Moacir

    2002-11-01

    This thesis focus on the impact of uranium mines in Brazil. It is recent, in the order of the Brazilian mining, the concern with the impact of mining activities. The Federal Constitution of 1988 compels the miner to rehabilitate the degraded environment, in accordance with the technical solution demanded by the competent public agency, which makes use of a system of environmental norms conditioning the mining activity. However, the concern with the closure of mines is in an early stage, for whose achievement the public power still lacks of norms and regulations. The closure of the first uranium mining in Brazil assumes special meaning, because the possible environmental problems related to uranium mines are considered to be serious and the uranium industry is state owned. This thesis is divided in two sections. The first one describes the state of the art of the uranium industry and the rules and management practices regarding the final closure of uranium mining in Brazil and countries like Australia, Canada, USA and France, that have been selected on the basis of the following criteria: production, exportation, control of reserves and final consumption of uranium. In the second part, a case study of Pocos de Caldas mine is presented, with description of historical production, plant waste and the chemical treatment of the ore. This part also presents the research carried out since the beginning of the operations aiming to remedial actions, including the dismantling of surface structures, tailings reclamation, and ground-water restoration, following CNEN (Brazilian Nuclear Energy Commission) rules, as well as a survey of local press coverage of the impact of the industry. A final recommendation is made regarding a management model and strategies to mitigate social and environmental impacts resulting from final closure of the CIPC. (author)

  7. Canadian climate impacts program. Programme Canadien des incidences climatologiques

    Energy Technology Data Exchange (ETDEWEB)

    1987-01-01

    In recognition of the impact of climate and climatic fluctuations on society, a Canadian Climate Program was established in 1978 to integrate the efforts of various federal and provincial agencies, as well as the universities and private sector, in the field of climatology. One of the program's main components since 1984 has been research to assess and identify the potential social and economic impacts of climate warming expected under a doubled carbon dioxide scenario. These and other studies over the last several years have clearly shown that increasing greenhouse gas concentrations have the potential for profound impacts on Canada's physical environment. However, they also show that there is considerable uncertainty associated with the magnitude of the expected climate warming and with understanding the relationships between climate, the biophysical environment, and socioeconomic systems. This report summarizes the program and specific studies including those on the impact of climate change on navigation and power generation, agriculture, tourism and recreation, and the marine environment.

  8. Incidences des extremes pluviometriques au Benin Impact of ...

    African Journals Online (AJOL)

    . These data were extracted from the file of ASECNA-Cotonou. In addition, surveys have been conducted to understand the impacts of these extreme rainfalls. The data and information collected was processed using descriptive statistics.

  9. Economic evaluation of environmental impacts of open cast mining project - an approach

    International Nuclear Information System (INIS)

    Maiti, S.K.; Pathak, K.

    1998-01-01

    Economic valuation of environmental attributes are pragmatic approach to evaluating the impacts and it helps decision makers to arrive at objective decisions on the basis of cost benefit ratio. For determining the physical impact and its quantification, four evaluation methods, namely-market price method, surrogate market price, survey based and cost based approaches are generally used. The present paper reviews the importance of environmental evaluation of impacts of mining and also reviews a few suitable methodologies that could be effectively used for economic evaluation of environmental impacts in open cast mining projects. (author)

  10. Characterization of microorganisms in the acidic mine water of the former uranium mine Koenigstein; Charakterisierung der Mikroorganismen im sauren Grubenwasser des ehemaligen Uranbergwerks Koenigstein

    Energy Technology Data Exchange (ETDEWEB)

    Zirnstein, Isabel

    2015-06-29

    The thesis on the characterization of microorganisms in the acidic mine water of the former uranium mine Koenigstein covers the following issues: Introduction: (1) Environmental rehabilitation of the uranium mine by the Wismut GmbH, microorganisms in the acidic mine waters, influence of microorganisms on the mobility of metals and radionuclides, biofilms and their influence on the mobility of metals and radionuclides, biodiversity of the mine Koenigstein before flooding; (2) Scope of the work. (3) Materials and methods: Site characterization, biofilm systems, sampling of water and biofilms, sample transport and storage, chemical analysis, speciation diagrams, catalyzed reporter deposition fluorescence in-situ hybridization, quantitative microbiological methods, classical microbiological cultivation methods, molecular biological methods, bioinformatics - sequence analysis, statistics, optical microscopy, biofilms. (4) Results and discussion: chemo-physical parameters before and after flooding, quantification of microorganisms, characterization of prokaryotes, characterization of eukaryotes, biofilms.

  11. Noise pollution in opencast mines - its impact on human environment

    International Nuclear Information System (INIS)

    Tripathy, D.P.; Patnaik, N.K.

    1994-01-01

    Noise could be defined as sound without agreeable musical quality or as unwanted sound. The problem of noise has been accentuated in the mining industry due to increased mechanisation. In opencast mines, noise is generated in almost all the mining operations, becoming thereby an integral part of the mining environment. Prolonged exposure to high levels of noise (>90dBA) proves harmful and may culminate in NIHL. Noise may also bring about other physiological disorders which could lead to irritability and lowering of efficiency. Before initiating any administrative, engineering and medical measures against the noise hazards, noise surveys are essential. They help in identifying the noise pollution sources and quantifying the risk exposures of workers. Effective antinoise measures can accordingly be formulated and implemented. The present paper discusses the results of noise studies in a limestone and dolomite quarry and analyses the SPL (dBA) produced by different machinery in this mine. Further, it focuses on the adverse effects of noise and lists the instruments available for noise monitoring. It also presents the noise standards recommended in India and abroad and suggests the noise abatement strategies to be adopted for protecting the workers against NHL. 7 refs., 2 figs., 6 tabs., 1 app

  12. Environmental radiological impact of some Portuguese uranium mines

    International Nuclear Information System (INIS)

    Galvao, J.P.; Bettencourt, A.O.; Teixeira, M.M.G.R.; Elias, M.D.T.

    1988-01-01

    An environmental radiological surveillance programme has been in progress around the most significant Portuguese uranium mines, from 1976 to 1983. A short description is given of the mines of Urgeirica (including uranium milling), Freixiosa, Pinhal de Souto and Bica. The results of the surveillance programme developed in the vicinity of these facilities are presented and the identified critical pathways are discussed. One of these pathways is the consumption of cabbage, which is an important component in the diet of the Portuguese population. The exposure of the critical groups, due to the intake of 226 Ra through the diet, calculated from the results of this monitoring programme, range from 0.02 to 1.5 mSv.y -1 for the different mines under study. (author)

  13. Steel, hard metal and diamonds. The history of drilling blast holes in mining and tunneling; Stahl, Hartmetall und Diamanten. Zur Geschichte des Sprenglochbohrens im Berg- und Tunnelbau

    Energy Technology Data Exchange (ETDEWEB)

    Feistkorn, E. [Inst. fuer Vortrieb und Gewinnung, DMT-Gesellschaft fuer Forschung und Pruefung mbH, Essen (Germany)

    1997-12-31

    Beginning of the blasting technique in mining and tunneling during the 17th century required drilling holes to take the explosive. Following the use of hammer and wedge, drilling was done over a long period of time by hand with mallet and drillsteel. Continuously, during the 19th century the handwork was replaced by drilling machines. Technically, the evolution of drilling equipment is marked by electrohydraulic control and automatization with the assistance of microelectronics. Regarding the material, the introduction of hard metal and - in addition for rotary drilling - the development of synthetic diamond material are the main features. (orig.) [Deutsch] Mit der Einfuehrung der Sprengtechnik im Bergbau und Tunnelbau im 17. Jahrhundert mussten verfahrensbedingt Bohrloecher zur Aufnahme des Sprengstoffes hergestellt werden. In Anlehnung an die Arbeit mit Schlaegel und Eisen erfolgte dies lange Zeit manuell mit dem Bohrfaeustel und Stahlbohrern. Die Handarbeit wurde waehrend der 2. Haelfte des 19. Jahrhunderts kontinuierlich durch Bohrmaschinen verdraengt. Maschinentechnisch ist die weitere Entwicklung durch elektrohydraulische Steuerungen und die Automatisierung der Bohrgeraete mit Hilfe der Mikroelektronik gekennzeichnet. Materialtechnisch stellen die Einfuehrung des Hartmetalls und beim drehenden Bohren zusaetzlich die Entwicklung synthetischer Diamantwerkstoffe die herausragenden Marksteine dar. (orig.)

  14. Socio-economic impact assessment and community engagement to reduce conflict over mine operations

    Energy Technology Data Exchange (ETDEWEB)

    John Rolfe; Stewart Lockie [Central Queensland University, Qld. (Australia)

    2007-09-15

    The broad aim of this project was to assist coal mining companies develop effective processes for engaging with their communities and developing impact assessment and planning processes that can be agreed by their stakeholders. The range of project outcomes have been summarised in a series of reports, as follows. Report 1. Overview of social and economic issues associated with the Bowen Basin coal industry; Report 2. A review of environmental impact assessments (EIA) for coal mine developments and the use of economic and social impact assessment in the Bowen Basin - tools and trends; Report 3. Accounting for social and economic impacts in annual sustainability reporting; Report 4. Regional Economic impact assessment: an overview of the input-output methods; Report 5. The impact of coal industry development projects on the Central Highlands, Fitzroy and Queensland economies: An application of input-output method; Report 6. Regional Economic impact assessment: factors influencing workforce mobility to regional mining towns; Report 7. Social and economic impacts associated with changes in the coal mining industry in the Bowen Basin on the township of Blackwater; Report 8. Social and economic impacts associated with changes in the coal mining industry in the Bowen Basin on the Bauhinia Shire (Springsure and Rolleston); Report 9. Results of the extended stakeholder analysis (Blackwater); Report 10. Results of the extended stakeholder analysis (the Bauhinia Shire); and Report 11. Summary and Recommendations. This report includes a number of summary findings about the social and economic impacts of coal mining on the communities in the Bowen Basin. The approaches used are outlined and briefly discussed.

  15. Impact of mining on the female community: a perspective of female miners in the Indian context

    Energy Technology Data Exchange (ETDEWEB)

    Mrinal K. Ghose [Indian School of Mines, Dhanbad (India). Centre of Mining Environment

    2004-12-01

    India ranks among the top ten mineral producing nations in the world. This paper investigates mineral production and focuses on the total value of minerals produced in the country. However, mining is seen as one of the most 'masculine' of industries and it is believed that women play an insignificant role in it. The paper examines the employment and social perspectives of women in the mineral industry and overviews the Indian Mines Act for providing employment to female miners. It also investigates the employment of women in coal, lignite and metalliferous mines and discusses the impact of mining in the female community. The study reveals that women take part in mining in non-traditional activities and there is a tendency to conceal the fact that women comprise an important part of the work force. The paper highlights the socioeconomic characteristics of women as miners and on the productive roles they play in mining. It also reviews the prospect of female miners with more involvement in the industry and concludes that women's work in mines needs to be valued and enhanced. The paper suggests certain ways that this can be achieved, such as providing training, leading to ability-building, skill enhancement and improved safety in mines.

  16. Impact of mining and forest regeneration on small mammal biodiversity in the Western Region of Ghana.

    Science.gov (United States)

    Attuquayefio, Daniel K; Owusu, Erasmus H; Ofori, Benjamin Y

    2017-05-01

    Much of the terrestrial biodiversity in sub-Saharan Africa is supported by tropical rainforest. Natural resource development, particularly surface mining in the rainforest, poses great risks to the region's rich and endemic biodiversity. Here, we assessed the impact of surface mining and the success of forest rehabilitation on small mammal diversity in the Western Region of Ghana. We surveyed small mammals in the project area and two adjoining forest reserves (control sites) before the mining operation and 10 years after mine closure and forest rehabilitation (topsoil replacement and revegetation). The forest reserves recorded higher species abundance than the mining areas. Majority of the species captured in the forest reserves, including Hylomyscus alleni, Praomys tullbergi, Malacomys cansdalei, and Hybomys trivirgatus, are forest obligate species. Only one individual each of H. alleni and P. tullbergi was captured in the naturally regenerated areas (core areas of mining activities that were allowed to revegetate naturally), while 32 individuals belonging to four species (Lophuromys sikapusi, Mus musculoides, Mastomys erythroleucus, and Crocidura olivieri) were recorded in the rehabilitated areas. Our data suggested negative effects of mining on small mammal diversity and the restoration of species diversity and important ecological processes after rehabilitation of altered habitats. We strongly encourage deliberate conservation efforts, particularly the development of management plans that require the restoration of degraded land resulting from mining activities.

  17. Mercury use in small scale gold mining in Ghana: an assessment of its impact on miners

    International Nuclear Information System (INIS)

    Biagya, Robert Yakubu

    2002-12-01

    Small scale gold mining is responsible for about 5% of Ghana’s annual gold production. It is estimated that between 80,000 and 100,000 people are engaged in small scale gold mining either on part-time or permanent basis. Amalgamation is the preferred method used by small scale gold miners for extracting free gold from its ores. The rate at which mercury, an important input in this method, is discharged into the atmosphere and water bodies is alarming. This research describes the various mining and processing methods in small scale gold mining and the extent of mercury use and releases to the environment. It discusses mercury and its human and environmental effects. It defines the various forms of mercury, routes of exposure, toxic effects. The levels of exposure to mercury by all groups of small scale gold miners are determined, and the impacts on the miners and the environment are assessed. It concludes that: • Mercury is mainly released into the environment as a result of small scale gold mining through spillage of elemental mercury and evaporation of mercury from the amalgam and sponge gold when they are heated on open fire. • Mercury in environmental samples from small scale gold mining areas is well above standard limit values. • Mercury released into the environment through small scale gold mining impacts negatively on the miners themselves and the general environment. Finally, it recommends the need for the adoption of mercury emission reduction strategies for dealing with the mercury problem. (au)

  18. Integrated approach of environmental impact and risk assessment of Rosia Montana Mining Area, Romania.

    Science.gov (United States)

    Stefănescu, Lucrina; Robu, Brînduşa Mihaela; Ozunu, Alexandru

    2013-11-01

    The environmental impact assessment of mining sites represents nowadays a large interest topic in Romania. Historical pollution in the Rosia Montana mining area of Romania caused extensive damage to environmental media. This paper has two goals: to investigate the environmental pollution induced by mining activities in the Rosia Montana area and to quantify the environmental impacts and associated risks by means of an integrated approach. Thus, a new method was developed and applied for quantifying the impact of mining activities, taking account of the quality of environmental media in the mining area, and used as case study in the present paper. The associated risks are a function of the environmental impacts and the probability of their occurrence. The results show that the environmental impacts and quantified risks, based on quality indicators to characterize the environmental quality, are of a higher order, and thus measures for pollution remediation and control need to be considered in the investigated area. The conclusion drawn is that an integrated approach for the assessment of environmental impact and associated risks is a valuable and more objective method, and is an important tool that can be applied in the decision-making process for national authorities in the prioritization of emergency action.

  19. Impact of acid mine drainages on surficial waters of an abandoned mining site.

    Science.gov (United States)

    García-Lorenzo, M L; Marimón, J; Navarro-Hervás, M C; Pérez-Sirvent, C; Martínez-Sánchez, M J; Molina-Ruiz, José

    2016-04-01

    Weathering of sulphide minerals produces a great variety of efflorescences of soluble sulphate salts. These minerals play an important role for environmental pollution, since they can be either a sink or a source for acidity and trace elements. This paper aims to characterise surface waters affected by mining activities in the Sierra Minera of Cartagena-La Union (SE, Spain). Water samples were analysed for trace metals (Zn, Cd, Pb, Cu, As and Fe), major ions (Na(+), K(+), Ca(2+) and Mg(2+)) and anions (F(-), Cl(-), NO3 (-), CO3 (2-), SO4 (2-)) concentrations and were submitted to an "evaporation-precipitation" experiment that consisted in identifying the salts resulting from the evaporation of the water aliquots sampled onsite. Mineralogy of the salts was studied using X-ray diffraction and compared with the results of calculations using VISUAL MINTEQ. The study area is heavily polluted as a result of historical mining and processing activities that has produced large amount of wastes characterised by a high trace elements content, acidic pH and containing minerals resulting from the supergene alteration of the raw materials. The mineralogical study of the efflorescences obtained from waters shows that magnesium, zinc, iron and aluminium sulphates predominate in the acid mine drainage precipitates. Minerals of the hexahydrite group have been quantified together with minerals of the rozenite group, alunogen and other phases such as coquimbite and copiapite. Calcium sulphates correspond exclusively to gypsum. In a semiarid climate, such as that of the study area, these minerals contribute to understand the response of the system to episodic rainfall events. MINTEQ model could be used for the analysis of waters affected by mining activities but simulation of evaporation gives more realistic results considering that MINTEQ does not consider soluble hydrated salts.

  20. The environmental and geomorphological impacts of historical gold mining in the Ohinemuri and Waihou river catchments, Coromandel, New Zealand

    Czech Academy of Sciences Publication Activity Database

    Alastair, J. H. C.; Nováková, Tereza; Hudson-Edwards, K. A.; Fuller, I. C.; Macklin, M. G.; Fox, E. G.; Zapico, I.

    2017-01-01

    Roč. 295, OCT 15 2017 (2017), s. 159-175 ISSN 0169-555X Institutional support: RVO:67985831 Keywords : mining-contaminated river * floodplain sedimentation * mine tailing discharge * historical gold mining * Ohinemuri River * Waihou River Subject RIV: DO - Wilderness Conservation OBOR OECD: Environmental sciences (social aspects to be 5.7) Impact factor: 2.958, year: 2016

  1. Impact des Propriétés Mécaniques, Géométriques et thermiques des ...

    African Journals Online (AJOL)

    AKA Boko

    Avecε , la déformation, α le coefficient de dilatation thermique, T. ∆ l'écart de température, E, I et A le module d'élasticité, le moment quadratique de la section des éléments substrats et la section des éléments. L'équilibre des moments dans la structure renforcée donne l'équation 13: (). () () ()[. ]a. T. tyyxNxMxM. xM. +. +. +. +.

  2. Germination of Blue Wildrye in Biochar Treated Mining Impacted Soils

    Science.gov (United States)

    Stabilization of mine sites with vegetation is an important management strategy to reduce metal movement off-site. Plant growth, however, is often hampered by poor soil conditions. Biochar is a novel soil amendment that may improve soil health conditions and improve plant growt...

  3. IMPACT OF MARBLE MINING ON SOIL PROPERTIES IN A PART ...

    African Journals Online (AJOL)

    Dr Osondu

    Ethiopian Journal of Environmental Studies and Management Vol. 4 No.2 2011 ... The effects of marble mining activities on the properties of soils of Igbeti marble area, Oke-Ogun,. Southwestern Nigeria .... 45´ and 4º 15´E in Olorunsogo Local.

  4. Research Note Impacts of mine dump pollution on plant species ...

    African Journals Online (AJOL)

    Effects of mine dump pollution on semiarid savanna vegetation were investigated in Kombat, Namibia. Vegetation structure, species richness, composition and diversity were compared between polluted and control sites. Concentrations of arsenic, chromium, copper, lead and zinc in soils were significantly higher closer to a ...

  5. Environmental impact assessment in an abandoned metal mine in Spain

    International Nuclear Information System (INIS)

    Moreno-Jimenez, E.; Oropesa, A.; Esteban, E.; Haro, A.; Carpena, R. O.; Tarazona, J. V.; Penalosa, J. M.

    2009-01-01

    There is an increasing concern regarding the environmental effects of mine tailing sites. Tailing are produced during ore processing and are characterized by high levels of heavy metals. Toxic metals in the tailing can be released in the environment by erosion and leaching processes and they contaminate water, soil and plant ecosystems resulting in human health and ecological risk. (Author)

  6. Investigating the impact of large mines on Chilean communities ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2011-07-15

    Jul 15, 2011 ... Mining has been a central part of Chile's culture since pre-colonial times. ... should understand, the researchers argue, is the value that local communities place on ... In its community, Escondida created a non profit charitable ...

  7. Monitoring coal mine changes and their impact on landscape patterns in an alpine region: a case study of the Muli coal mine in the Qinghai-Tibet Plateau.

    Science.gov (United States)

    Qian, Dawen; Yan, Changzhen; Xing, Zanpin; Xiu, Lina

    2017-10-14

    The Muli coal mine is the largest open-cast coal mine in the Qinghai-Tibet Plateau, and it consists of two independent mining sites named Juhugeng and Jiangcang. It has received much attention due to the ecological problems caused by rapid expansion in recent years. The objective of this paper was to monitor the mining area and its surrounding land cover over the period 1976-2016 utilizing Landsat images, and the network structure of land cover changes was determined to visualize the relationships and pattern of the mining-induced land cover changes. In addition, the responses of the surrounding landscape pattern were analysed by constructing gradient transects. The results show that the mining area was increasing in size, especially after 2000 (increased by 71.68 km 2 ), and this caused shrinkage of the surrounding lands, including alpine meadow wetland (53.44 km 2 ), alpine meadow (6.28 km 2 ) and water (6.24 km 2 ). The network structure of the mining area revealed the changes in lands surrounding the mining area. The impact of mining development on landscape patterns was mainly distributed within a range of 1-6 km. Alpine meadow wetland was most affected in Juhugeng, while alpine meadow was most affected in Jiangcang. The results of this study provide a reference for the ecological assessment and restoration of the Muli coal mine land.

  8. Process and device for hacking and arranging the mining face in mines. Verfahren und Einrichtung zum Auffahren eines Aufhauens und Einrichten des Gewinnungsstrebs in Bergbaubetrieben

    Energy Technology Data Exchange (ETDEWEB)

    Beckmann, K

    1982-04-01

    A process for driving a heading machine and a device for arranging the mining face is described. A movable heading and conveyor device is used for this purpose and to secure the roof in the area of the conveyor device, a moving hydraulic prop is used as the support. After preparing the heading, the frames remain as movable roadway supports to secure the entry to the mining face.

  9. Impact of former uranium mining activities on the floodplains of the Mulde River, Saxony, Germany

    International Nuclear Information System (INIS)

    Bister, S.; Birkhan, J.; Lüllau, T.; Bunka, M.; Solle, A.; Stieghorst, C.; Riebe, B.; Michel, R.; Walther, C.

    2015-01-01

    The Mulde River drains the former uranium mining areas in Saxony (Germany), which has led to a large-scale contamination of the river and the adjacent floodplain soils with radionuclides of the uranium decay series. The objective of the investigation is to quantify the long-term effect of former uranium mining activities on a river system. All of the investigated environmental compartments (water, sediment, soil) still reveal an impact from the former uranium mining and milling activities. The contamination of water has decreased considerably during the last 20 years due to the operation of water treatment facilities. The uranium content of the sediments decreased as well (on average by a factor of 5.6), most likely caused by displacement of contaminated material during flood events. Currently, the impact of the mining activities is most obvious in soils. For some of the plots activity concentrations of >200 Bq/kg of soil were detected for uranium-238. Alluvial soils used as grassland were found to be contaminated to a higher degree than those used as cropland. - Highlights: • Water, sediments, and soils affected by uranium mining were investigated. • All environmental compartments still reveal an impact of former uranium mining. • Contamination of water and sediment has decreased over the past 20 years. • Alluvial soils under pasture are higher contaminated than those from cropland

  10. Integrated assessmet of the impacts associated with uranium mining and milling

    International Nuclear Information System (INIS)

    Parzyck, D.C.; Baes, C.F. III; Berry, L.G.

    1979-07-01

    The occupational health and safety impacts are assessed for domestic underground mining, open pit mining, and milling. Public health impacts are calculated for a population of 53,000 located within 88 km (55 miles) of a typical southwestern uranium mill. The collective annual dose would be 6.5 man-lung rem/year, 89% of which is from 222 Rn emitted from mill tailings. The dose to the United States population is estimated to be 6 x 10 4 man-lung rem from combined mining and milling operations. This may be comparedd with 5.7 x 10 5 man-lung rem from domestic use of natural gas and 4.4 x 10 7 man-lung rem from building interiors. Unavoidable adverse environmental impacts appear to be severe in a 250 ha area surrounding a mill site but negligible in the entire potentially impacted area (500,000 ha). The contemporary uranium resource and supply industry and its institutional settings are described in relation to the socio-economic impacts likely to emerge from high levels of uranium mining and milling. Radon and radon daughter monitoring techniques associated with uranium mining and milling are discussed

  11. Integrated assessmet of the impacts associated with uranium mining and milling

    Energy Technology Data Exchange (ETDEWEB)

    Parzyck, D.C.; Baes, C.F. III; Berry, L.G.

    1979-07-01

    The occupational health and safety impacts are assessed for domestic underground mining, open pit mining, and milling. Public health impacts are calculated for a population of 53,000 located within 88 km (55 miles) of a typical southwestern uranium mill. The collective annual dose would be 6.5 man-lung rem/year, 89% of which is from /sup 222/Rn emitted from mill tailings. The dose to the United States population is estimated to be 6 x 10/sup 4/ man-lung rem from combined mining and milling operations. This may be comparedd with 5.7 x 10/sup 5/ man-lung rem from domestic use of natural gas and 4.4 x 10/sup 7/ man-lung rem from building interiors. Unavoidable adverse environmental impacts appear to be severe in a 250 ha area surrounding a mill site but negligible in the entire potentially impacted area (500,000 ha). The contemporary uranium resource and supply industry and its institutional settings are described in relation to the socio-economic impacts likely to emerge from high levels of uranium mining and milling. Radon and radon daughter monitoring techniques associated with uranium mining and milling are discussed.

  12. Impact of rent-seeking on productivity in Chinese coal mine safety supervision: A simulation study

    International Nuclear Information System (INIS)

    Chen, Hong; Feng, Qun; Zhu, Dandan; Han, Shuai; Long, Ruyin

    2016-01-01

    During the “golden decade” (2001–2011) of the coal industry in China, rent-seeking increased in coal mine safety supervision alongside significant improvements in coal mine safety status and increased economic benefits in the coal industry. To explore this internal relationship, we developed a Matlab simulation system and simulated the impact of rent-seeking from each level of the supervision department on coal mine productivity in different scenarios. The results showed the following. (1) Rent-seeking had no significant influence on the average level of material productivity but it had an adverse effect on the average level of mental productivity. Due to the effects of rent-seeking, productivity tended to exhibit unstable and destructive fluctuations, and rent-seeking had the dual effect of promoting and restraining productivity in a wide range with a high frequency. (2) In the supervision scenario, supervision by the high-level department was efficient, and productivity was promoted more by the national and provincial supervision department. (3) In the rent-seeking scenario, each level of the department had an intensity threshold above which coal mine accidents occurred. We also propose suggestions that focuses on the improved supervision of Chinese coal mine safety in three areas based on the “new normal” safety concept. - Highlights: •We discussed rent-seeking behavior in Chinese coal mine safety supervision. •We explored the characteristics of coal mine productivity. •We investigated the impact of rent-seeking on coal mine productivity in three scenarios. •We found rent-seeking led to great fluctuations in productivity with a dual effect. •We proposed a model strategy for Chinese coal mine safety supervision in three areas.

  13. Forecast of environmental impact in the evaluation of Cerro Solo nuclear mine

    International Nuclear Information System (INIS)

    Gallucci, A.R.

    1993-01-01

    This work presents a project for the study of the environmental impact of the Cerro Solo uranium mine. The survey is to be carried out performing different kinds of studies: mineralization, tectonics, hydrogeology, preliminary studies on different exploitation methods, costs, reserves estimation, economical studies and preliminary studies on possible environmental impacts. (author). 24 refs., 1 fig., 1 tab

  14. Socio-Economic and Environmental Impacts of Mining inBotswana ...

    African Journals Online (AJOL)

    On the basis of the findings, it is recommended that there should be an independent medical health team to carry out health impact research, comprehensive socio-economic and environmental impact assessment of the mine, to initiate regular community and institutional consultations and set up an independent air quality ...

  15. Impact des néo-facteurs de pollution sur la qualité des eaux de la ...

    African Journals Online (AJOL)

    Les résultats obtenus montrent une pollution importante par les éléments majeurs des Eléments Traces Métalliques (ETM) et des nutriments. Les méthodes utilisées convergent toutes pour confirmer la pollution naturelle caractérisée par les liens existant entre les éléments majeurs et une pollution anthropiques par les ETM ...

  16. Experimental data sulfate and metal removal from mining impacted water collected at the Formosa Mine, OR, and sulfur speciation in the obtained solid residues.

    Data.gov (United States)

    U.S. Environmental Protection Agency — The data set contains the elemental composition, pH, and sulfate content of the utilized mining impacted water used as influent in the columns study, the data for...

  17. Impact des TIC sur la motivation et la réussite des étudiants Enquête à l’Université d’Abomey-Calavi au Bénin

    Directory of Open Access Journals (Sweden)

    Serge Armel Attenoukon

    2013-01-01

    Full Text Available Cette étude tente d’explorer, dans un contexte de forts taux d’échec des apprenants des facultés classiques à l’Université d’Abomey-Calavi (Bénin, les perceptions des étudiants et des enseignants quant à l’impact des TIC tant sur la motivation que sur la réussite des apprenants. L’étude est tout particulièrement importante dans notre contexte où les TIC sont de plus en plus utilisées en pédagogie universitaire et où les étudiants y recourent dans leur pratique plus que les formateurs dans la leur. Au total, 171 questionnaires ont été remplis par les étudiants et les enseignants; 11 apprenants et 6 enseignants ont passé des entrevues semi-dirigées. Des analyses statistiques et qualitatives de ces données révèlent que les étudiants et les enseignants soulignent, dans leur majorité, le potentiel motivationnel des TIC, notamment de l’ordinateur et d’Internet, pour l’apprentissage. Elles ont cependant montré une position plus mitigée entre les étudiants et les enseignants en ce qui concerne l’effet positif des TIC pour la réussite des études.

  18. Underground mining long-term impacts on forest lands

    International Nuclear Information System (INIS)

    Liblik, V.; Toomik, A.; Rull, E.; Pensa, M.

    2000-01-01

    Underground mining of oil shale in northeastern Estonia causes changes in the exterior of the local landscape in the form of depression with a depth up to 1.7 metres. As a result of the changing water regime (formation of small water-bodies and marshy areas) the environmental conditions in subsided areas will be affected as well, influencing the development and alternation of local plant communities. Researches and surveys in the subsided area, which was formed 20 years ago in the area of room-and-pillar mining, prove that the former forest has become a poor fen that may further develop to a swamp forest or a transitional bog forest. The affected areas are of great interest from the viewpoint of landscape diversity. (author)

  19. Environmental impact assessment for the Syncrude Aurora Mine

    International Nuclear Information System (INIS)

    1996-01-01

    Syncrude Canada has applied to the Alberta Energy and Utilities Board (AEUB) and Alberta Environmental Protection for approval to construct and operate the Aurora Mine, its new oil sands mine and associated bitumen facilities located 70 km northeast of Fort McMurray, Alberta. Volume 1, the principal volume in the set of 31 volumes, includes the detailed assessment of environmental effects on air quality, noise, surface water flows, surface water quality, groundwater flow and quality, geology, terrain and soils overburden, fisheries and aquatic resources, vegetation and resource use, wildlife population and habitat, human health and public safety. Baseline data for each of the above areas are contained in separate volumes. 400 refs., 162 tabs., 190 figs

  20. International symposium on the history of mining and metallurgy. Internationales Symposium zur Geschichte des Bergbaus und Huettenwesens

    Energy Technology Data Exchange (ETDEWEB)

    Waechtler, E; Engewald, G R [eds.

    1980-01-01

    The VII. International Symposium took place in Freiberg and Reinsberg, in the German Democratic Republic, from September 4-8, 1978. The Symposium was organized by the Executive Committee of the International Committee on the History of Technology (ICOHTEC) and was attended by 77 participants from 14 countries in Eastern and Western Europe as well as USA and Canada. A total of 51 papers were published and 30 talks were held and analyzed in discussions. The papers dealt with selected topics on the history of the mining and metallurgical industries, primarily from the fifteenth century to the twentieth century. The topics concern the development of science, of new mining and metallurgical equipment and processes, innovation in mines, increase in productivity, improvement in working conditions, economic progress and economic crisis, social aspects of the labor force and trade union movements in major mining countries. An excursion to a brown coal surface mine was organized in conjunction with the Symposium. (In German)

  1. Coal mining and agriculture: a study in environmental impact assessment. [On agriculture in UK

    Energy Technology Data Exchange (ETDEWEB)

    Selman, P.H.

    1986-03-01

    Coal mining activities in the U.K. are reported to be extending into areas of comparatively unspoilt countryside. Despite reductions in the National Coal Board's programme of future expansion, it is considered that the scale of impact of new mining activities on agriculture is still likely to be significant. The major impact will be associated with land alienation, but a wide range of other adverse effects will also be encountered. In view of the controversy likely to accompany new mining proposals, it is recommended that methods of environmental impact assessment (EIA) should be adopted. The nature and components of EIA are reviewed, and a framework appropriate to mining-agriculture conflicts is advanced. This approach is more closely examined In relation to recent developments in Leicestershire, U.K. It is found that the magnitude of agricultural impact is small in national terms, but may be severe at the local and - if mining activities become geographically concentrated - even at the sub-regional level. Systematic scrutiny of major coaling proposals by EIA will therefore become essential. (115 refs.)

  2. Coal and Open-pit surface mining impacts on American Lands (COAL)

    Science.gov (United States)

    Brown, T. A.; McGibbney, L. J.

    2017-12-01

    Mining is known to cause environmental degradation, but software tools to identify its impacts are lacking. However, remote sensing, spectral reflectance, and geographic data are readily available, and high-performance cloud computing resources exist for scientific research. Coal and Open-pit surface mining impacts on American Lands (COAL) provides a suite of algorithms and documentation to leverage these data and resources to identify evidence of mining and correlate it with environmental impacts over time.COAL was originally developed as a 2016 - 2017 senior capstone collaboration between scientists at the NASA Jet Propulsion Laboratory (JPL) and computer science students at Oregon State University (OSU). The COAL team implemented a free and open-source software library called "pycoal" in the Python programming language which facilitated a case study of the effects of coal mining on water resources. Evidence of acid mine drainage associated with an open-pit coal mine in New Mexico was derived by correlating imaging spectrometer data from the JPL Airborne Visible/InfraRed Imaging Spectrometer - Next Generation (AVIRIS-NG), spectral reflectance data published by the USGS Spectroscopy Laboratory in the USGS Digital Spectral Library 06, and GIS hydrography data published by the USGS National Geospatial Program in The National Map. This case study indicated that the spectral and geospatial algorithms developed by COAL can be used successfully to analyze the environmental impacts of mining activities.Continued development of COAL has been promoted by a Startup allocation award of high-performance computing resources from the Extreme Science and Engineering Discovery Environment (XSEDE). These resources allow the team to undertake further benchmarking, evaluation, and experimentation using multiple XSEDE resources. The opportunity to use computational infrastructure of this caliber will further enable the development of a science gateway to continue foundational COAL

  3. Occurrence and partitioning of cadmium, arsenic and lead in mine impacted paddy rice: Hunan, China.

    Science.gov (United States)

    Williams, Paul N; Lei, Ming; Sun, Guoxin; Huang, Qing; Lu, Ying; Deacon, Claire; Meharg, Andrew A; Zhu, Yong-Guan

    2009-02-01

    Paddy rice has been likened to nictiana sp in its ability to scavenge cadmium (Cd) from soil, whereas arsenic (As) accumulation is commonly an order of magnitude higher than in other cereal crops. In areas such as those found in parts of Hunan province in south central China, base-metal mining activities and rice farming coexist. Therefore there is a considerable likelihood that lead (Pb), in addition to Cd and As, will accumulate in rice grown in parts of this region above levels suitable for human consumption. To test this hypothesis, a widespread provincial survey of rice from mine spoilt paddies (n = 100), in addition to a follow-up market grain survey (n = 122) conducted in mine impacted areas was undertaken to determine the safety of local rice supply networks. Furthermore, a specific Cd, As, and Pb biogeochemical survey of paddy soil and rice was conducted within southern China, targeting sites impacted by mining of varying intensities to calibrate rice metal(loid) transfer models and transfer factors that can be used to predict tissue loading. Results revealed a number of highly significant correlations between shoot, husk, bran, and endosperm rice tissue fractions and that rice from mining areas was enriched in Cd, As, and Pb. Sixty-five, 50, and 34% of all the mine-impacted field rice was predicted to fail national food standards for Cd, As, and Pb, respectively. Although, not as elevated as the grains from the mine-impacted field survey, it was demonstrated that metal(loid) tainted rice was entering food supply chains intended for direct human consumption.

  4. Impacts of new environmental and safety regulations on uranium mining, milling and waste management in China

    International Nuclear Information System (INIS)

    Wang Yongping; Zheng Yuhui; Shi Xiangjun

    2001-01-01

    Nuclear power progress has triggered the development and innovation of nuclear fuel industries in China. At present the Chinese government has put more emphasis on industrial readjustment and technical innovation in uranium mining and milling in order to fuel the nuclear power development, satisfy environmental protection and improve economic efficiency of the industry. The current organizations and approval procedure for establishing regulations and the implementation and consequences of the regulations, technical polices and development strategies concerning uranium mining, milling, treatment of waste ores and mill tailings, and reduction of the workers' suffered exposure dose etc. in China are discussed and the economic, health and environmental impacts of the uranium mining and metallurgy with reformation achievement and the introduction of advanced technologies such as the in-situ leaching and heap leaching mining technologies are assessed in this paper. (author)

  5. Impacts of manganese mining activity on the environment: interactions among soil, plants, and arbuscular mycorrhiza.

    Science.gov (United States)

    Rivera-Becerril, Facundo; Juárez-Vázquez, Lucía V; Hernández-Cervantes, Saúl C; Acevedo-Sandoval, Otilio A; Vela-Correa, Gilberto; Cruz-Chávez, Enrique; Moreno-Espíndola, Iván P; Esquivel-Herrera, Alfonso; de León-González, Fernando

    2013-02-01

    The mining district of Molango in the Hidalgo State, Mexico, possesses one of the largest deposits of manganese (Mn) ore in the world. This research assessed the impacts of Mn mining activity on the environment, particularly the interactions among soil, plants, and arbuscular mycorrhiza (AM) at a location under the influence of an open Mn mine. Soils and plants from three sites (soil under maize, soil under native vegetation, and mine wastes with some vegetation) were analyzed. Available Mn in both soil types and mine wastes did not reach toxic levels. Samples of the two soil types were similar regarding physical, chemical, and biological properties; mine wastes were characterized by poor physical structure, nutrient deficiencies, and a decreased number of arbuscular mycorrhizal fungi (AMF) spores. Tissues of six plant species accumulated Mn at normal levels. AM was absent in the five plant species (Ambrosia psilostachya, Chenopodium ambrosoides, Cynodon dactylon, Polygonum hydropiperoides, and Wigandia urens) established in mine wastes, which was consistent with the significantly lower number of AMF spores compared with both soil types. A. psilostachya (native vegetation) and Zea mays showed mycorrhizal colonization in their root systems; in the former, AM significantly decreased Mn uptake. The following was concluded: (1) soils, mine wastes, and plant tissues did not accumulate Mn at toxic levels; (2) despite its poor physical structure and nutrient deficiencies, the mine waste site was colonized by at least five plant species; (3) plants growing in both soil types interacted with AMF; and (4) mycorrhizal colonization of A. psilostachya influenced low uptake of Mn by plant tissues.

  6. Hydrological functions of a mine-impacted and natural peatland-dominated watershed, James Bay Lowland

    Directory of Open Access Journals (Sweden)

    Melissa Leclair

    2015-09-01

    New hydrological insights: Deep seepage (groundwater recharge varied with marine sediment thickness and represented a significant loss to the local system. Large downward fluxes were also measured in fen systems that are typically local discharge zones. Evaporation rates were also found to be lower in the bogs and fens and where impacted by lower water tables. When evaluating the water balance, with only 14.5% of the watershed impacted by the mine, the hydrological function of the entire watershed is more driven by seasonal climate variations than mine dewatering.

  7. Hydrogeological assessment of Acid mine Drainage impacts in the West Rand Basin, Gauteng Province

    CSIR Research Space (South Africa)

    Hobbs, PJ

    2007-08-01

    Full Text Available HYDROGEOLOGICAL ASSESSMENT OF ACID MINE DRAINAGE IMPACTS IN THE WEST RAND BASIN, GAUTENG PROVINCE Principal Author PJ Hobbs (Pr.Sci.Nat.) Co-author JE Cobbing (Pr.Sci.Nat.) August 2007 Report prepared for CSIR / THRIP Document... it is published. A Hydrogeological Assessment of Acid Mine Drainage Report No. Impacts in the West Rand Basin, Gauteng Province CSIR/NRE/WR/ER/2007/0097/C CSIR Natural Resources and the Environment (i) The “Lodge” spring rising...

  8. The Cogemagazine reviews. The rehabilitation of mining sites in France; Les cahiers de Cogemagazine. Le reamenagement des sites miniers en France

    Energy Technology Data Exchange (ETDEWEB)

    Loriot, O.; Bof, M.; Villeneuve, A

    1998-02-01

    The French uranium mines are progressively closing down. After a mining division has closed down, the main objectives of the Cogema group are: ensuring the long-term safety and healthiness of the site, reducing the residual impacts, preventing any abusive intrusion, reducing the surface of land submitted to right-of-way, encouraging the reconversion of the site, and succeeding in the integration of the site in the landscape in agreement with the local authorities. This brochure presents the strategy followed by Cogema for the rehabilitation of his sites: the French mining concessions and the uranium extraction and processing techniques, the storage of tailings and processing residues, the environment protection and the respect of regulation (environmental surveillance, working groups, administrative procedures and regulatory texts, impact studies...), the backfilling and safety of underground mines, the cost studies for the rehabilitation of open cast mines, the dismantling of factories, the confinement of residues and the revegetation, the continuous monitoring of the rehabilitated sites (water, atmosphere, food..). (J.S.)

  9. Impact des politiques fiscales visant à améliorer la nutrition en ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    améliorer la nutrition en Afrique du Sud. Prévention des maladies non transmissibles. (PMNT). PROFIL DE PROJET. Le programme Prévention des maladies non transmis- sibles (PMNT) soutient la production de nouvelles connaissances en vue d'inspirer des politiques et des pro- grammes peu coûteux mais susceptibles ...

  10. Environmental impact of the gold mining industry in Ghana

    International Nuclear Information System (INIS)

    Bamford, S.A.; Osae, E.; Aboh, I.; Biney, C.A.; Antwi, L.A.

    1990-01-01

    X-ray Fluorescence (XRF) Analysis and Atomic Absorption Spectrophotometry (AAS) have been used in assessing heavy metal pollution from some gold mines in Ghana. The presence and levels of heavy metals in gold ore, gold tailing, inland waters, and river sediments have been determined. Using these techniques, the heavy metals: Cr, Mn, Fe, Cu, Zn, As, Pb, Rb, Sr, Y, Zr, and Nb were identified in some of the solid samples within a concentration range of 0.08 ppm-4.9%. However, the inland waters showed the presence of only Fe and Zn at levels of 0.08-2.4 μg/mL

  11. Impact des glucocorticoïdes plasmatiques sur la maturation et le fonctionnement de l'inhibition spinale GABAergique

    OpenAIRE

    Zell, Vivien

    2013-01-01

    Glucocorticoids (GC) such as corticosterone (CORT) in rats are synthetized following stress and HPA axis activation and are part of organisms response to homeostasis perturbations. Furthermore, GC can also alter pain perception. Les glucocorticoides (GC) sont des hormones stéroïdes synthétisées par les glandes surrénales suite à l’activation de l’axe hypothalamo-hypophysaire- surrénalien (ou axe HPA pour hypothalamic-pituitary-adrenal). Leur sécrétion pulsatile est sous le contrôle de l’ho...

  12. Public feelings and environmental impacts from uranium mining inside Kakadu National Park and around Grand Canyon National Park

    International Nuclear Information System (INIS)

    McKlveen, J.W.; Kvasnicka, J.

    1989-01-01

    There are two uranium mines in the Northern Territory of Australia, Ranger and Nabarlek. The Ranger mine, the only producing operation, is located in the Kakadu National Park, which has been listed on the United Nations' World Heritage list. The park is dedicated to preserving the Australian aboriginal culture: It contains several aboriginal villages and historic sites. Uranium mining in the park has been accepted quite well by the public and the aborigines. Employees of the Ranger mine and their relatives have established a public information program that includes tours of the mining and milling operations. There is no environmental impact to the area from the mining and milling of uranium at the Ranger site. The region around the Grand Canyon contains many highgrade uranium deposits. The ore is contained in unique breccia pipe formations. The pipes, which resemble a cylinder with a diemter of ∼ 100 m and a height of ∼ 300 m, originated as limestone solution cavities located ∼ 400 m below the plateau. There are several exposed deposits along the canyon walls, but no mining operations are allowed within the park boundaries. While the real environmental impact is insignificant, the perceived impact is tremendous. Many special-interest groups have attempted to halt the mining operations. No valid environmental impacts have been predicted or observed as a result of the current mining operations. However, one mine has been delayed for religious reasons by a local tribe or native Americans

  13. Nuclear safety, environmental and community impacts of uranium mining - Canada

    International Nuclear Information System (INIS)

    Scissons, Kevin H.

    2009-01-01

    The Canadian Nuclear Safety Commission (CNSC) is mandated under the Nuclear Safety and Control Act (NSCA, the CNSC's mandate is set out in Section 9 of the Nuclear Safety and Control Act.) for regulating all nuclear facilities and nuclear-related activities in Canada. Before any person or company can prepare a site, construct, operate, decommission or abandon a nuclear facility, or possess, use, transport or store nuclear substances, they must obtain a licence issued by the CNSC. This paper provides an overview of the licensing of uranium mines and mills in Canada, taking into consideration the requirements of the NSCA and associated regulations concerning the environment, the people and the communities we protect. Describing the role of the CNSC and our regulatory framework will form a key foundation to this paper. This paper will also explain the different licensing phases and their focus for uranium mines and mills. It will conclude with an overview of our community involvement (social, public aspects) and our joint regulatory approach for defence in depth. (orig.)

  14. Economic statistics for the mining and metallurgical industries: 1990. Statistique economique des industries extractives et metallurgiques annee 1990

    Energy Technology Data Exchange (ETDEWEB)

    Rzonzef, L.

    1991-01-01

    Provides economic statistics for the Belgian mining and metallurgical industries in 1990. The review is divided into 4 parts: the extractive industries (including an analysis of the coal market and mines, quarries and associated industries); coke and briquette making; metallurgy (i.e. blast furnaces, steel making, rolling mills and manpower and materials consumption in the steel industry); and the extraction of sand from the Belgian continental shelf. 17 tabs.

  15. 78 FR 48713 - Notice of Availability of the Draft Environmental Impact Statement for the Ochoa Mine Project in...

    Science.gov (United States)

    2013-08-09

    ...] Notice of Availability of the Draft Environmental Impact Statement for the Ochoa Mine Project in Lea County, New Mexico AGENCY: Bureau of Land Management, Interior. ACTION: Notice of availability. SUMMARY... Draft Environmental Impact Statement (EIS) for the Ochoa Mine Project (Project) and by this notice is...

  16. Assessment on ecological environment impact caused by the exploitation of a uranium mine

    International Nuclear Information System (INIS)

    Zhang Xueli; Xu Lechang; Li Xianjie; Wang Erqi; Wei Guangzhi; Hu Penghua

    2008-01-01

    On the basis of investigation, the assessment index of ecological environment impact is determined from the aspects of natural eco-environment and social eco-environment. Both qualitative analysis and quantitative assessment are adopted for assessing the ecological environment impact during the exploitation of a uranium mine in Jiangxi province. The results show that some values of the assessment index in natural eco-subsystem decline slightly, while those of the assessment index in social eco-subsystem ascend so that the ecological environment quality around the uranium mine ascend slightly. Moreover, some reasonable advices on eco-environment protection measures are put forward in order to build a ecotype uranium mine. (authors)

  17. Control of radiological impacts in deactivated uranium mine - the portuguese experience

    International Nuclear Information System (INIS)

    Pereira, Alcides; Neves, Luis

    2011-01-01

    The exploration of radioactive ores occurred in Portugal during around 100 years, and on that period 4370 tons were produced of uranium concentrate, and an estimated total of 13 millions of tons of residues, of various type and variable dangerous grade. From the year 2000 that the government has been performed studies on environmental characterization at the mining areas and remediation project as well. The precise evaluation of the environmental impacts implies the the knowledge of prior work situation, nonexistent for the case of Portuguese mines. This work proposes a methodology for exceeding that limitation focused on selection of area sited at the same metallogenetic province, and considered representative of background. The radiological impacts are checked by the effective dose calculated for reference groups of the exposed population, at this region and in the principal mining area at Portugal (Urgeirica), at the end of exploration and after the finalization of some remediation works

  18. Uranium mining and indigenous social impact issues - Kakadu Region, Australia

    International Nuclear Information System (INIS)

    Wellings, P.

    2002-01-01

    This paper reports on indigenous social impact issues in the Kakadu/Alligators Rivers region of Australia. It briefly outlines the social history of the region, reflects on local, national and international attention being given to the impact of regional development on local indigenous (bininj) people, notes how social impact issues are being addressed and suggests some lessons learnt. (author)

  19. The impact of liberalisation of the electricity market on the hard coal mining sector in Poland

    Energy Technology Data Exchange (ETDEWEB)

    Kaminski, Jacek [Mineral and Energy Economy Research Institute of Polish Academy of Sciences, Energy and Environmental Policy Division, Wybickiego 7, 31-261 Krakow (Poland)

    2009-03-15

    The liberalisation of the electricity market changed the conditions of operation not only for the power industry, but also for related sectors. One of the particularly sensitive industries in Poland is coal mining, which is the result of coal-based structure of electricity generation. As it is more difficult, in the liberalised market, to burden consumers with all the costs, electricity producers are eager to transfer the risk of operation to the suppliers. That increases uncertainty about the future of the hard coal industry. The aim of this paper was to quantitatively estimate the impact that liberalisation of the electricity markets may have on the coal mining sector in Poland. First of all, the possible areas of that impact were identified. Then the model, which involved detailed relations in the impact areas identified, was developed and employed to evaluate the performance of the mining sector. The comparison of scenarios of a monopolistic electricity sector with a liberalised one enabled an estimation of the scale of the impact on the mining sector to be made. The results showed that liberalisation causes decreased coal consumption and decreased operating profits in coal companies. However, some savings in electricity costs are possible for coal producers. (author)

  20. The impact of liberalisation of the electricity market on the hard coal mining sector in Poland

    Energy Technology Data Exchange (ETDEWEB)

    Jacek Kaminski [Mineral and Energy Economy Research Institute of Polish Academy of Sciences, Krakow (Poland). Energy and Environmental Policy Division

    2009-03-15

    The liberalisation of the electricity market changed the conditions of operation not only for the power industry but also for related sectors. One of the particularly sensitive industries in Poland is coal mining, which is the result of coal-based structure of electricity generation. As it is more difficult, in the liberalised market, to burden consumers with all the costs, electricity producers are eager to transfer the risk of operation to the suppliers. That increases uncertainty about the future of the hard coal industry. The aim of this paper was to quantitatively estimate the impact that liberalisation of the electricity markets may have on the coal mining sector in Poland. First of all, the possible areas of that impact were identified. Then the model, which involved detailed relations in the impact areas identified, was developed and employed to evaluate the performance of the mining sector. The comparison of scenarios of a monopolistic electricity sector with a liberalised one enabled an estimation of the scale of the impact on the mining sector to be made. The results showed that liberalisation causes decreased coal consumption and decreased operating profits in coal companies. However, some savings in electricity costs are possible for coal producers. 42 refs., 20 figs., 9 tabs., 1 app.

  1. Where artisanal mines and forest meet: Socio-economic and environmental impacts in the Congo Basin

    NARCIS (Netherlands)

    Ingram, V.J.; Tieguhong, J.C.; Schure, J.M.; Nkamgnia, E.; Tadjuidje, M.H.

    2011-01-01

    While mineral exploitation can provide significant income and employment, it may negatively impact the environment, being ultimately detrimental to livelihoods in the long term. The consequences of mining are of concern in high value forest ecosystems such as the Sangha Tri-National (TNS) landscape

  2. The impact of liberalisation of the electricity market on the hard coal mining sector in Poland

    International Nuclear Information System (INIS)

    Kaminski, Jacek

    2009-01-01

    The liberalisation of the electricity market changed the conditions of operation not only for the power industry, but also for related sectors. One of the particularly sensitive industries in Poland is coal mining, which is the result of coal-based structure of electricity generation. As it is more difficult, in the liberalised market, to burden consumers with all the costs, electricity producers are eager to transfer the risk of operation to the suppliers. That increases uncertainty about the future of the hard coal industry. The aim of this paper was to quantitatively estimate the impact that liberalisation of the electricity markets may have on the coal mining sector in Poland. First of all, the possible areas of that impact were identified. Then the model, which involved detailed relations in the impact areas identified, was developed and employed to evaluate the performance of the mining sector. The comparison of scenarios of a monopolistic electricity sector with a liberalised one enabled an estimation of the scale of the impact on the mining sector to be made. The results showed that liberalisation causes decreased coal consumption and decreased operating profits in coal companies. However, some savings in electricity costs are possible for coal producers. (author)

  3. THE IMPACT OF THE MINING EXPLOITATIONS FROM BUDOI ON THE NATURAL ENVIRONMENT

    Directory of Open Access Journals (Sweden)

    Cătălin CREłU

    2013-06-01

    Full Text Available The work is an attempt to respond to what extent the environment affected by serious anthropogenic interventions (the mining exploitation from the Budoi tunnel and the Budoi Village is close to its original state or a similar one, as a result of cessation of anthropic impact and the conduct of a program of restoration and preservation of the environment.

  4. Uranium mining and milling by Cogema environmental impact compared to 1 mSv limit

    International Nuclear Information System (INIS)

    Bernhard, S.; Daroussin, J.L.; Pfiffelmann, J.P.

    1996-01-01

    CEA then COGEMA have been operating mines and mills in France since 1948. Total production nears 70000 t of U in the concentrate which were contained in some 85 millions tons of ores (pulp and heap leaching). Many sites are now undergoing remediation and impact on the environment has always been a great concern. (author)

  5. La formation continue des enseignants aux TICE. Impact sur les contextes locaux

    OpenAIRE

    Villemonteix , Francois

    2004-01-01

    La formation continue des enseignants du premier degré dans le domaine des TICE a pour ambition de participer à l'émergence de nouvelles postures professionnelles intégrant l'ordinateur en présence des élèves. Comment les dispositifs actuels de formation participent-t-ils à l'accomplissement de cette tâche, compte tenu de la variété des contextes personnels et professionnels des publics enseignants ? Cette contribution apporte des éléments de réflexion sur le rôle joué par l'action de formati...

  6. Hydrological functions of a mine-impacted and natural peatland-dominated watershed, James Bay Lowland

    OpenAIRE

    Leclair, Melissa; Whittington, Pete; Price, Jonathan

    2015-01-01

    Study region: This study was conducted in Northern Ontario, Canada, in the middle of the Hudson-James Bay. Lowland: one of the world’s largest wetland complexes. Study focus: Northern latitudes are expected to be the most impacted by climate change in the next century and adding to this stressor are increased mineral exploration activities, such as the De Beers Victor Mine, a large open-pit diamond mine. Because of the extremely low relief and presence of marine sediments, horizontal runof...

  7. Efficient system modules to meet the communication requirements in the mining industry; Leistungsfaehige Systembausteine zur Erfuellung der Kommunikationsanforderungen des Bergbaus

    Energy Technology Data Exchange (ETDEWEB)

    Becker, F. [Becker Mining Systems GmbH, Friedrichsthal (Germany)

    2006-11-07

    Communication technology has become an important module of efficient operation of a mine. The exchange of information with technical aids takes place between man and machines as participants in communication. The diversity of the requirements associated with the need for communication in a mine can be mastered only by a wide portfolio of suitable technical components. In addition to the technical serviceability of the individual components the ergonomic handling and economic efficiency of the entire production operation must also be ensured. For this purpose it is necessary to design the individual technical modules in such a way that despite their different appearance they interact as a system and thus make available an integrated and transparent communication network to the mine. (orig.)

  8. Radiological impact of surface water and sediment near uranium mining sites.

    Science.gov (United States)

    Ivanova, K; Stojanovska, Z; Badulin, V; Kunovska, B; Yovcheva, M

    2015-12-01

    The aim of this study is to assess the radiological impact of surface water and sediment around uranium mining sites 20 years after their closing. The areas under observations are 31 former classical underground uranium mining and exploratory sites in Bulgaria, named as objects. The extraction and processing of uranium ores in the Republic of Bulgaria were ended in 1992. To assess the radiological impact of radionuclides field expeditions were performed to sample water and bottom sediment. The migration of uranium through surface water was examined as one of the major pathways for contamination spread. The range of uranium concentration in water flowing from the mining sites was from 0.012 to 6.8 mgU l(-1) with a geometric mean of 0.192 mgU l(-1). The uranium concentrations in water downstream the mining sites were approximately 3 times higher than the background value (upstream). The concentrations of Unat, (226)Ra, (210)Pb, and (232)Th in the sediment of downstream river were higher than those upstream by 3.4, 2.6, 2, and 1.7 times, respectively. The distribution coefficient of uranium reflects its high mobility in most of the sites. In order to evaluate the impact on people as well as site prioritization for more detailed assessment and water management, screening dose assessments were done.

  9. Redundancy in electronic health record corpora: analysis, impact on text mining performance and mitigation strategies.

    Science.gov (United States)

    Cohen, Raphael; Elhadad, Michael; Elhadad, Noémie

    2013-01-16

    The increasing availability of Electronic Health Record (EHR) data and specifically free-text patient notes presents opportunities for phenotype extraction. Text-mining methods in particular can help disease modeling by mapping named-entities mentions to terminologies and clustering semantically related terms. EHR corpora, however, exhibit specific statistical and linguistic characteristics when compared with corpora in the biomedical literature domain. We focus on copy-and-paste redundancy: clinicians typically copy and paste information from previous notes when documenting a current patient encounter. Thus, within a longitudinal patient record, one expects to observe heavy redundancy. In this paper, we ask three research questions: (i) How can redundancy be quantified in large-scale text corpora? (ii) Conventional wisdom is that larger corpora yield better results in text mining. But how does the observed EHR redundancy affect text mining? Does such redundancy introduce a bias that distorts learned models? Or does the redundancy introduce benefits by highlighting stable and important subsets of the corpus? (iii) How can one mitigate the impact of redundancy on text mining? We analyze a large-scale EHR corpus and quantify redundancy both in terms of word and semantic concept repetition. We observe redundancy levels of about 30% and non-standard distribution of both words and concepts. We measure the impact of redundancy on two standard text-mining applications: collocation identification and topic modeling. We compare the results of these methods on synthetic data with controlled levels of redundancy and observe significant performance variation. Finally, we compare two mitigation strategies to avoid redundancy-induced bias: (i) a baseline strategy, keeping only the last note for each patient in the corpus; (ii) removing redundant notes with an efficient fingerprinting-based algorithm. (a)For text mining, preprocessing the EHR corpus with fingerprinting yields

  10. Environmental Impacts and Health Aspects in the Mining Industry. A Comparative Study of the Mining and Extraction of Uranium, Copper and Gold

    Energy Technology Data Exchange (ETDEWEB)

    Nilsson, Jenny-Ann; Randhem, Johan

    2008-07-01

    This thesis work has analysed environmental impacts and health aspects in the mining industry of copper, uranium and gold with the aim of determining the relative performance, in a given set of parameters, of the uranium mining industry. A selection of fifteen active mining operations in Australia, Canada, Namibia, South Africa, and the United States of America constitute the subject of this study. The project includes detailed background information about mineral extraction methods, the investigated minerals and the mining operations together with descriptions of the general main health hazards and environmental impacts connected to mining. The mineral operations are investigated in a cradle to gate analysis for the year of activity of 2007 using the economic value of the product at the gate as functional unit. Primary data has been collected from environmental reports, company web pages, national databases and through personal contact with company representatives. The subsequent analysis examines the collected data from a resource consumption, human health and ecological consequences point of view. Using the Life Cycle Impact Assessment methodology of characterisation, primary data of environmental loads have been converted to a synoptic set of environmental impacts. For radiation and tailings issues, a more general approach is used to address the problem. Based on the collected data and the investigated parameters, the results indicate a presumptive relative disadvantageous result for the uranium mining industry in terms of health aspects but an apparent favourable relative result in terms of environmental impacts. Given the prerequisites of this study, it is not feasible to draw any unambiguous conclusions. Inabilities to do this are mainly related to inadequate data availability from mine sites (especially in areas concerning tailings management), and difficulties concerned with the relative valuation of specific performance parameters, in particular radiation

  11. Environmental Impacts and Health Aspects in the Mining Industry. A Comparative Study of the Mining and Extraction of Uranium, Copper and Gold

    International Nuclear Information System (INIS)

    Nilsson, Jenny-Ann; Randhem, Johan

    2008-01-01

    This thesis work has analysed environmental impacts and health aspects in the mining industry of copper, uranium and gold with the aim of determining the relative performance, in a given set of parameters, of the uranium mining industry. A selection of fifteen active mining operations in Australia, Canada, Namibia, South Africa, and the United States of America constitute the subject of this study. The project includes detailed background information about mineral extraction methods, the investigated minerals and the mining operations together with descriptions of the general main health hazards and environmental impacts connected to mining. The mineral operations are investigated in a cradle to gate analysis for the year of activity of 2007 using the economic value of the product at the gate as functional unit. Primary data has been collected from environmental reports, company web pages, national databases and through personal contact with company representatives. The subsequent analysis examines the collected data from a resource consumption, human health and ecological consequences point of view. Using the Life Cycle Impact Assessment methodology of characterisation, primary data of environmental loads have been converted to a synoptic set of environmental impacts. For radiation and tailings issues, a more general approach is used to address the problem. Based on the collected data and the investigated parameters, the results indicate a presumptive relative disadvantageous result for the uranium mining industry in terms of health aspects but an apparent favourable relative result in terms of environmental impacts. Given the prerequisites of this study, it is not feasible to draw any unambiguous conclusions. Inabilities to do this are mainly related to inadequate data availability from mine sites (especially in areas concerning tailings management), and difficulties concerned with the relative valuation of specific performance parameters, in particular radiation

  12. Impact of oil shale mine water discharges on phytoplankton community of Purtse catchment rivers

    International Nuclear Information System (INIS)

    Raetsep, A.; Rull, E.; Liblik, V.

    2002-01-01

    The multivariate relationship between phytoplankton abundance and different factors both natural and generated by oil shale mining in the Purtse catchment rivers (Purtse, Kohtla, and Ojamaa) in Augusts 1996-2000 was studied. Impact of oil shale mine water discharges, causing the input of sulfates and chlorides into the rivers, on phytoplankton abundance in river water was characterized by significant negative linear correlation. The amount of annual precipitation influenced positively the characteristics of phytoplankton abundance in river water. The complex of linear regression formulas was derived for characterising phytoplankton abundance in the lower course of the Purtse River using meteorological, hydrological and hydrogeological as well as geochemical data of water circulation. Closing the Sompa, Tammiku and Kohtla mines in 2000-2001 decreased essentially anthropogenic stress on ecological condition of the Purtse catchment rivers. (author)

  13. CORRELATIONS ON THE MINING WORKINGS DRIVE BY BLASTING UNDER THE IMPACT OF ROCK BURSTS

    Directory of Open Access Journals (Sweden)

    Vladimir Abramović

    1989-12-01

    Full Text Available Comprehensive testing blastings on ihe development faces in the areas with bursts have been performed in the coal mine of Labin. The obtained results prove d isti ne t relations in exp!osive consumption (kg/m3 and in the dimension of faces' cross-section (m2, The impact of the work face structure (coal: stone bas been distinguished for each blasting, too. Chaoges depending on the brand of esplosive as well as those ones considering the advance of mining activitv have also been observed. It has been proved in the pro-duction process of the mine, that the results with increased work productivity are obtained in spite of the fact that miners are exposed to danger of rock bursts (the paper is published in Croatian.

  14. Fool’s Gold: Understanding Social, Economic and Environmental Impacts from Gold Mining in Quang Nam Province, Vietnam

    Directory of Open Access Journals (Sweden)

    Nhi Nguyen

    2018-04-01

    Full Text Available Extractive industries are often claimed to contribute to both poverty reduction and economic growth. Yet, there is also a body of research that suggests natural resource dependence can result in limited development, environmental degradation and social upheaval. This paper examines differences in the socioeconomic and environmental state of mining and non-mining communities in rural Vietnam in order to understand the extent to which mining contributes to livelihood development and socioeconomic well-being. In particular, we examine the role that “corporate social responsibility” (CSR plays in supporting community development in Phuoc Son and Phu Ninh districts, Quang Nam province. Content analysis of newspapers, government documents and mining company reports provided a contextual overview of mining operations and community relations in each study area. Semi-structured interviews were used to collect information from local and regional stakeholders to further understand perceived impacts of mining operations on local communities. Our study finds that in comparison to non-mining communities, communities with active mines demonstrated increased job development, decreased poverty rates, enhanced infrastructure and social development along with increased incidences of CSR initiatives. However, a number of adverse effects from mining activities were reported including environmental degradation (e.g., deforestation, water pollution, etc. increased criminal activity and drug addiction. Dependence on mine-related employment in local communities becomes acutely apparent when temporary mine closures result in widespread unemployment. Local governments may be the greatest beneficiaries of mining with increased tax revenues and enhanced management potential of leased land. Non-mining communities without direct benefits from mining activities maintained economic diversity and were therefore more resilient to economic shocks such as nearby mine closures.

  15. Evaluating the Impact of Modern Copper Mining on Ecosystem Services in Southern Arizona

    Science.gov (United States)

    Virgone, K.; Brusseau, M. L.; Ramirez-Andreotta, M.; Coeurdray, M.; Poupeau, F.

    2014-12-01

    Historic mining practices were conducted with little environmental forethought, and hence generated a legacy of environmental and human-health impacts. However, an awareness and understanding of the impacts of mining on ecosystem services has developed over the past few decades. Ecosystem services are defined as benefits that humans obtain from ecosystems, and upon which they are fundamentally dependent for their survival. Ecosystem services are divided into four categories including provisioning services (i.e., food, water, timber, and fiber); regulating services (i.e., climate, floods, disease, wastes, and water quality); supporting services (i.e., soil formation, photosynthesis, and nutrient cycling) and cultural services (i.e., recreational, aesthetic, and spiritual benefits) (Millennium Ecosystem Assessment, 2005). Sustainable mining practices have been and are being developed in an effort to protect and preserve ecosystem services. This and related efforts constitute a new generation of "modern" mines, which are defined as those that are designed and permitted under contemporary environmental legislation. The objective of this study is to develop a framework to monitor and assess the impact of modern mining practices and sustainable mineral development on ecosystem services. Using the sustainability performance indicators from the Global Reporting Initiative (GRI) as a starting point, we develop a framework that is reflective of and adaptive to specific local conditions. Impacts on surface and groundwater water quality and quantity are anticipated to be of most importance to the southern Arizona region, which is struggling to meet urban and environmental water demands due to population growth and climate change. We seek to build a more comprehensive and effective assessment framework by incorporating socio-economic aspects via community engaged research, including economic valuations, community-initiated environmental monitoring, and environmental human

  16. Offsetting the impacts of mining to achieve no net loss of native vegetation.

    Science.gov (United States)

    Sonter, L J; Barrett, D J; Soares-Filho, B S

    2014-08-01

    Offsets are a novel conservation tool, yet using them to achieve no net loss of biodiversity is challenging. This is especially true when using conservation offsets (i.e., protected areas) because achieving no net loss requires avoiding equivalent loss. Our objective was to determine if offsetting the impacts of mining achieves no net loss of native vegetation in Brazil's largest iron mining region. We used a land-use change model to simulate deforestation by mining to 2020; developed a model to allocate conservation offsets to the landscape under 3 scenarios (baseline, no new offsets; current practice, like-for-like [by vegetation type] conservation offsetting near the impact site; and threat scenario, like-for-like conservation offsetting of highly threatened vegetation); and simulated nonmining deforestation to 2020 for each scenario to quantify avoided deforestation achieved with offsets. Mines cleared 3570 ha of native vegetation by 2020. Under a 1:4 offset ratio, mining companies would be required to conserve >14,200 ha of native vegetation, doubling the current extent of protected areas in the region. Allocating offsets under current practice avoided deforestation equivalent to 3% of that caused by mining, whereas allocating under the threat scenario avoided 9%. Current practice failed to achieve no net loss because offsets did not conserve threatened vegetation. Explicit allocation of offsets to threatened vegetation also failed because the most threatened vegetation was widely dispersed across the landscape, making conservation logistically difficult. To achieve no net loss with conservation offsets requires information on regional deforestation trajectories and the distribution of threatened vegetation. However, in some regions achieving no net loss through conservation may be impossible. In these cases, other offsetting activities, such as revegetation, will be required. © 2014 Society for Conservation Biology.

  17. Concentration-Discharge Behavior of Contaminants in a Stream Impacted by Acid Mine Drainage

    Science.gov (United States)

    Shaw, M. E.; Klein, M.; Herndon, E.

    2017-12-01

    Acid mine drainage (AMD) has severely degraded streams throughout the Appalachian coal region of the United States. AMD occurs when pyrite contained in coal is exposed to water and air during mining activities and oxidized to release high concentrations of sulfate, metals, and acidity into water bodies. Little is known about the concentration-discharge (CQ) relationships of solutes in AMD-impacted streams due to the complicated nature of acid mine drainage systems. For example, streams may receive inputs from multiple sources that include runoff, constructed treatment systems, and abandoned mines that bypass these systems to continue to contaminate the streams. It is important to understand the CQ relationships of contaminants in AMD-impacted streams in order to elucidate contaminant sources and to predict effects on aquatic ecosystems. Here, we study the CQ behaviors of acid and metals in a contaminated watershed in northeastern Ohio where limestone channels have been installed to remediate water draining from a mine pool into the stream. Stream chemistry was measured in samples collected once per day or once per hour during storm events, and stream flow was measured continuously at the watershed outlet. Increases in stream velocity during storm events resulted in an increase in pH (from 3 to 6) that subsequently decreased back to 3 as flow decreased. Additionally, Fe and Mn concentrations in the stream were high during baseflow (7 and 15 mg/L, respectively) and decreased with increasing discharge during storm events. These results indicate that the treatment system is only effective at neutralizing stream acidity and removing metals when water flow through the limestone channel is continuous. We infer that the acidic and metal-rich baseflow derives from upwelling of contaminated groundwater or subsurface flow from a mine pool. Ongoing studies aim to isolate the source of this baseflow contamination and evaluate the geochemical transformations that occur as it

  18. Environmental impacts of coal mine and thermal power plant to the surroundings of Barapukuria, Dinajpur, Bangladesh.

    Science.gov (United States)

    Hossain, Md Nazir; Paul, Shitangsu Kumar; Hasan, Md Muyeed

    2015-04-01

    The study was carried out to analyse the environmental impacts of coal mine and coal-based thermal power plant to the surrounding environment of Barapukuria, Dinajpur. The analyses of coal, water, soil and fly ash were carried out using standard sample testing methods. This study found that coal mining industry and coal-based thermal power plant have brought some environmental and socio-economic challenges to the adjacent areas such as soil, water and air pollution, subsidence of agricultural land and livelihood insecurity of inhabitants. The pH values, heavy metal, organic carbon and exchangeable cations of coal water treated in the farmland soil suggest that coal mining deteriorated the surrounding water and soil quality. The SO4(2-) concentration in water samples was beyond the range of World Health Organisation standard. Some physico-chemical properties such as pH, conductivity, moisture content, bulk density, unburned carbon content, specific gravity, water holding capacity, liquid and plastic limit were investigated on coal fly ash of Barapukuria thermal power plant. Air quality data provided by the Barapukuria Coal Mining Company Limited were contradictory with the result of interview with the miners and local inhabitants. However, coal potentially contributes to the development of economy of Bangladesh but coal mining deteriorates the environment by polluting air, water and soil. In general, this study includes comprehensive baseline data for decision makers to evaluate the feasibility of coal power industry at Barapukuria and the coalmine itself.

  19. Impact of gold mining associated with mercury contamination in soil, biota sediments and tailings in Kenya.

    Science.gov (United States)

    Odumo, Benjamin Okang'; Carbonell, Gregoria; Angeyo, Hudson Kalambuka; Patel, Jayanti Purshottam; Torrijos, Manuel; Rodríguez Martín, José Antonio

    2014-11-01

    This work considered the environmental impact of artisanal mining gold activity in the Migori-Transmara area (Kenya). From artisanal gold mining, mercury is released to the environment, thus contributing to degradation of soil and water bodies. High mercury contents have been quantified in soil (140 μg kg(-1)), sediment (430 μg kg(-1)) and tailings (8,900 μg kg(-1)), as expected. The results reveal that the mechanism for transporting mercury to the terrestrial ecosystem is associated with wet and dry depositions. Lichens and mosses, used as bioindicators of pollution, are related to the proximity to mining areas. The further the distance from mining areas, the lower the mercury levels. This study also provides risk maps to evaluate potential negative repercussions. We conclude that the Migori-Transmara region can be considered a strongly polluted area with high mercury contents. The technology used to extract gold throughout amalgamation processes causes a high degree of mercury pollution around this gold mining area. Thus, alternative gold extraction methods should be considered to reduce mercury levels that can be released to the environment.

  20. Environmental impact assessment of european non-ferro mining industries through life-cycle assessment

    Science.gov (United States)

    Hisan Farjana, Shahjadi; Huda, Nazmul; Parvez Mahmud, M. A.

    2018-05-01

    European mining industries are the vast industrial sector which contributes largely on their economy which constitutes of ferro and non-ferro metals and minerals industries. The non-ferro metals extraction and processing industries require focus of attention due to sustainability concerns as their manufacturing processes are highly energy intensive and impacts globally on environment. This paper analyses major environmental effects caused by European metal industries based on the life-cycle impact analysis technologies. This research work is the first work in considering the comparative environmental impact analysis of European non-ferro metal industries which will reveal their technological similarities and dissimilarities to assess their environmental loads. The life-cycle inventory datasets are collected from the EcoInvent database while the analysis is done using the CML baseline and ReCipe endpoint method using SimaPro software version 8.4. The CML and ReCipe method are chosen because they are specialized impact assessment methods for European continent. The impact categories outlined for discussion here are human health, global warming and ecotoxicity. The analysis results reveal that the gold industry is vulnerable for the environment due to waste emission and similar result retained by silver mines a little bit. But copper, lead, manganese and zinc mining processes and industries are environment friendly in terms of metal extraction technologies and waste emissions.

  1. Raisons de l'impact majeur des inondations provoquées par les ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    30 avr. 2012 ... Les inondations de juillet 2010 dans le bassin de l'Indus sont l'une des ... comprend l'un des systèmes d'irrigation de surface les plus importants du monde. ... de revenus, différents actifs et accès à des services (logement sûr, ...

  2. Impact écotoxicologique de mélanges de pesticides sur des fonctions microbiennes des sols : apport d’une prise en compte écologique dans l’évaluation des risques

    OpenAIRE

    Devers-Lamrani, Marion; Rouard, Nadine; Cheviron, Nathalie; Grondin, Virginie; Martin-Laurent, Fabrice

    2015-01-01

    L’utilisation de pesticides permet d’assurer la qualité de la production végétale mais elle contribue à la contamination des sols et des eaux et produit des effets sur des organismes noncibles. L’évaluation des risques requièrent actuellement une meilleure prise en compte des effets des pesticides sur le fonctionnement des écosystèmes. Or, les démarches et indicateurs classiques manquent de représentativité écologique. La fonction microbienne de biodégradation des pesticides est essentielle c...

  3. Impacts of Mining and Urbanization on the Qin-Ba Mountainous Environment, China

    Directory of Open Access Journals (Sweden)

    Xinliang Xu

    2016-05-01

    Full Text Available The Qin-Ba Ecological Functional Zone is a component of China’s ecological security pattern designed to protect the regional ecosystem and maintain biodiversity. However, due to the impact of mining and urban encroachment, the plight of a sustainable ecosystem in the Qin-Ba mountainous area is deteriorating. This paper has used a remote sensing and geographic information system (GIS to examine the impacts of mining and urban encroachment on the environment in the Qin-Ba mountainous area. The results indicate that the total mined area in 2013 was 22 km2 and is predicted to escalate. Results also show that the ecosystems in Fengxian County, Shaanxi Province and Baokang County, Hubei Province were most severely affected by mining. Urbanization in the Qin-Ba mountainous area has seen an increase of 85.58 km2 in urban land use from 2010 to 2013. In addition, infrastructure development including airport construction, tourism resorts and real estate development in the Qin-Ba mountainous area has intensified environmental and biodiversity disturbances since large areas of forest have been cleared. Our results should provide insight and assistance to city planners and government officials in making informed decisions.

  4. Impact of former uranium mining activities on the floodplains of the Mulde River, Saxony, Germany.

    Science.gov (United States)

    Bister, S; Birkhan, J; Lüllau, T; Bunka, M; Solle, A; Stieghorst, C; Riebe, B; Michel, R; Walther, C

    2015-06-01

    The Mulde River drains the former uranium mining areas in Saxony (Germany), which has led to a large-scale contamination of the river and the adjacent floodplain soils with radionuclides of the uranium decay series. The objective of the investigation is to quantify the long-term effect of former uranium mining activities on a river system. All of the investigated environmental compartments (water, sediment, soil) still reveal an impact from the former uranium mining and milling activities. The contamination of water has decreased considerably during the last 20 years due to the operation of water treatment facilities. The uranium content of the sediments decreased as well (on average by a factor of 5.6), most likely caused by displacement of contaminated material during flood events. Currently, the impact of the mining activities is most obvious in soils. For some of the plots activity concentrations of >200 Bq/kg of soil were detected for uranium-238. Alluvial soils used as grassland were found to be contaminated to a higher degree than those used as cropland. Copyright © 2015 Elsevier Ltd. All rights reserved.

  5. Sand mining impacts on long-term dune erosion in southern Monterey Bay

    Science.gov (United States)

    Thornton, E.B.; Sallenger, Abby; Sesto, Juan Conforto; Egley, L.; McGee, Timothy; Parsons, Rost

    2006-01-01

    Southern Monterey Bay was the most intensively mined shoreline (with sand removed directly from the surf zone) in the U.S. during the period from 1906 until 1990, when the mines were closed following hypotheses that the mining caused coastal erosion. It is estimated that the yearly averaged amount of mined sand between 1940 and 1984 was 128,000 m3/yr, which is approximately 50% of the yearly average dune volume loss during this period. To assess the impact of sand mining, erosion rates along an 18 km range of shoreline during the times of intensive sand mining (1940–1990) are compared with the rates after sand mining ceased (1990–2004). Most of the shoreline is composed of unconsolidated sand with extensive sand dunes rising up to a height of 46 m, vulnerable to the erosive forces of storm waves. Erosion is defined here as a recession of the top edge of the dune. Recession was determined using stereo-photogrammetry, and LIDAR and GPS surveys. Long-term erosion rates vary from about 0.5 m/yr at Monterey to 1.5 m/yr in the middle of the range, and then decrease northward. Erosion events are episodic and occur when storm waves and high tides coincide, allowing swash to undercut the dune and resulting in permanent recession. Erosion appears to be correlated with the occurrence of El Niños. The calculated volume loss of the dune in southern Monterey Bay during the 1997–98 El Niño winter was 1,820,000 m3, which is almost seven times the historical annual mean dune erosion of 270,000 m3/yr. The alongshore variation in recession rates appears to be a function of the alongshore gradient in mean wave energy and depletions by sand mining. After cessation of sand mining in 1990, the erosion rates decreased at locations in the southern end of the bay but have not significantly changed at other locations.

  6. The use of vibration monitoring to record the blasting works impact on buildings surrounding open-pit mines

    Directory of Open Access Journals (Sweden)

    Sołtys Anna

    2018-01-01

    Full Text Available Environmental protection law and geological and mining law require the mineral mining plant to protect its surroundings from the effects of mining operations. This also applies to the negative impact of vibrations induced by blasting works on people and construction facilities. Effective protection is only possible if the level of this impact is known, therefore it is necessary to record it. The thesis formulated in this way has been and continues to be the guiding principle of the research works carried out in the AGH Laboratory of Blasting Work and Environmental Protection. As a result of these works are procedures for conducting preventive activities by open-pit mines in order to minimize the impact of blasting on facilities in the surrounding area. An important element of this activity is the monitoring of vibrations in constructions, which is a source of knowledge for excavation supervisors and engineers performing blasting works, thus contributing to raising the awareness of the responsible operation of the mining plant. Developed in the Laboratory of the Mine's Vibration Monitoring Station (KSMD, after several modernizations, it became a fully automated system for monitoring and recording the impact of blasting works on the surrounding environment. Currently, there are 30 measuring devices in 10 open-pit mines, and additional 8 devices are used to provide periodic measurement and recording services for the mines concerned.

  7. The use of vibration monitoring to record the blasting works impact on buildings surrounding open-pit mines

    Science.gov (United States)

    Sołtys, Anna; Pyra, Józef; Winzer, Jan

    2018-04-01

    Environmental protection law and geological and mining law require the mineral mining plant to protect its surroundings from the effects of mining operations. This also applies to the negative impact of vibrations induced by blasting works on people and construction facilities. Effective protection is only possible if the level of this impact is known, therefore it is necessary to record it. The thesis formulated in this way has been and continues to be the guiding principle of the research works carried out in the AGH Laboratory of Blasting Work and Environmental Protection. As a result of these works are procedures for conducting preventive activities by open-pit mines in order to minimize the impact of blasting on facilities in the surrounding area. An important element of this activity is the monitoring of vibrations in constructions, which is a source of knowledge for excavation supervisors and engineers performing blasting works, thus contributing to raising the awareness of the responsible operation of the mining plant. Developed in the Laboratory of the Mine's Vibration Monitoring Station (KSMD), after several modernizations, it became a fully automated system for monitoring and recording the impact of blasting works on the surrounding environment. Currently, there are 30 measuring devices in 10 open-pit mines, and additional 8 devices are used to provide periodic measurement and recording services for the mines concerned.

  8. Review : Pollution due to Coal Mining Activity and its Impact on Environment

    Directory of Open Access Journals (Sweden)

    Andi Arif Setiawan

    2018-03-01

    Full Text Available Utilization of natural resources in the form of coal mines has a positive impact on economic and energy development, in addition to coal mining activities have a negative impact on the environment that result in environmental pollution in soil, water, and air. Pollution begins when clearing land, taking exploitation, transporting, stockpile and when the coal is burned. When land clearing causes damage to forest ecosystems. At the time of exploitation impact on air pollution by coal dust particles, the erosion, siltation of the river, the pollution of heavy metals and the formation of acid mine drainage (AMD. The high acid conditions cause the faster heavy metals such as Hg, Cd, Pb, Cr, Cu, Zn and Ni present in the coal dissolved and carried to the waters. Coal stockpile activity also causes pollution in the air, soil, and water. At the time the coal is burned as an energy source causes the emission of hazardous materials into the air of Hg, As, Se and CO2 gas, NOx, SO2. This condition has an impact on the environment and ultimately on human health.

  9. Impact Of Mining Sector To Poverty And Income Inequality In Indonesia A Panel Data Analysis

    Directory of Open Access Journals (Sweden)

    Sudarlan

    2015-06-01

    Full Text Available Abstract Since the decentralization was implemented by Indonesia government in the last decade the provincial government has more powerful authority to use and manage on the own provinces. The use of natural resources is blessed by the God for community welfare. By using 30 provincial cross-section data that the mining sector has a negative affected and statistically significant to economic growth and it has unsignificantly affected for decreasing poverty and also unsignificant for income inequality in Indonesia. The purpose of this research is to understand the affect of mining sector to poverty and income inequality in Indonesia from 2002 to 2011. The research used explanatory method by using time-series and cross-section data and applied a two stage simultaneous equation method 2SLS. The important finding in this research is a mining sector had a negative impact on economic growth and economic growth was not significant statistically for poverty reduction b inflation did not have any impact on economic growth and had a positive impact poverty headcount poverty gap and poverty severity and c economic growth had positive impact on income inequality.

  10. The Impact of Groupement des Cartes Bancaires on Competition Law Enforcement

    Directory of Open Access Journals (Sweden)

    Piero Fattori

    2015-10-01

    Full Text Available The Groupement des Cartes bancaires represents a key judgment for competition enforcement, as it provides helpful clarification on the notion of “restriction by object” and on the judicial standard of review of Commission decisions. As of the first aspect, the ruling limited the restrictions by object to those which by their very nature and on the basis of the experience reveal a sufficient degree of harm to competition. On the standard required to the Court in reviewing competition decisions, the ECJ underlines the necessity of carrying out a full review, specifying that the presence of economic issues should not dispense the Court with an in-depth review of the law and the facts. The principles expressed in the judgment could have a great impact also at national level, where it could provide useful guidance both to Italian competition authority and to the Administrative Courts.

  11. Research of the Occupational Psychological Impact Factors Based on the Frequent Item Mining of the Transactional Database

    Directory of Open Access Journals (Sweden)

    Cheng Dongmei

    2015-01-01

    Full Text Available Based on the massive reading of data mining and association rules mining documents, this paper will start from compressing transactional database and propose the frequent complementary item storage structure of the transactional database. According to the previous analysis, this paper will also study the association rules mining algorithm based on the frequent complementary item storage structure of the transactional database. At last, this paper will apply this mining algorithm in the test results analysis module of team psychological health assessment system, and will extract the relationship between each psychological impact factor, so as to provide certain guidance for psychologists in their mental illness treatment.

  12. Overburden of lignite mining pits. A problem for the future?; Abraumkippen des Braunkohlenbergbaus. Ein Problem fuer die Zukunft?

    Energy Technology Data Exchange (ETDEWEB)

    Cremer, Nils [Erftverband, Bergheim (Germany); Huesener, Dirk [Landesamt fuer Natur, Umwelt und Verbraucherschutz NRW, Recklinghausen (Germany)

    2009-07-01

    Due to the brown coal mining industry, overburden dumps with a total area of approximately 300 square kilometers will develop at the Niederrhein (Federal Republic of Germany) up to the year 2045. The renewed rise of the lowered ground-water level will rise in high sulfate loadings in the next decades. The expected propagation of the registered materials already today is of great interest for long-term water-economical planning.

  13. Traceless disappeared. Villages in Thuringia - sacrifices of uranium mining. 2. ed.; Spurlos verschwunden. Doerfer in Thueringen - Opfer des Uranabbaus

    Energy Technology Data Exchange (ETDEWEB)

    Kirchner, Annerose

    2017-08-01

    The uranium mine WISMUT in the former German Democratic Republic is in the process of remediation and re-cultivation since the 1990ies. The remediation measures are supposed to last until 20145 with costs of about 8 Billion Euros. The challenges and the responsibility for the contaminated area will probably last for generations. The book includes contributions from inhabitants that lost their native country, their villages, their homes, keeping the remembrance of their childhood.

  14. Arsenic distribution in a pasture area impacted by past mining activities.

    Science.gov (United States)

    Abad-Valle, P; Álvarez-Ayuso, E; Murciego, A; Muñoz-Centeno, L M; Alonso-Rojo, P; Villar-Alonso, P

    2018-01-01

    Former mine exploitations entail a serious threat to surrounding ecosystems as after closure of mining activities their unmanaged wastes can be a continuous source of toxic trace elements. Quite often these mine sites are found within agricultural farming areas, involving serious hazards as regards product (feed/food) quality. In this work a grazing land impacted by the abandoned mine exploitation of an arsenical deposit was studied so as to evaluate the fate of arsenic (As) and other trace elements and the potential risks involved. With this aim, profile soil samples (0-50cm) and pasture plant species (Agrostis truncatula, Holcus annus and Leontodon longirostris) were collected at different distances (0-100m) from the mine waste dump and analyzed for their trace element content and distribution. Likewise, plant trace element accumulation from impacted grazing soils and plant trace element translocation were assessed. The exposure of livestock grazing animals to As was also evaluated, establishing its acceptability regarding food safety and animal health. International soil guideline values for As in grazing land soils (50mgkg -1 ) resulted greatly exceeded (up to about 20-fold) in the studied mining-affected soils. Moreover, As showed a high mobilization potential under circumstances such as phosphate application or establishment of reducing conditions. Arsenic exhibited relatively high translocation factor (TF) values (up to 0.32-0.89) in pasture plant species, reaching unsafe concentrations in their above-ground tissues (up to 32.9, 16.9 and 9.0mgkg -1 in Agrostis truncatula, Leontodon longirostris and Holcus annus, respectively). Such concentrations represent an elevated risk of As transfer to the high trophic-chain levels as established by international legislation. The limited fraction of arsenite found in plant roots should play an important role in the relatively high As root-to-shoot translocation shown by these plant species. Both soil ingestion and

  15. An innovative carbonate coprecipitation process for the removal of zinc and manganese from mining impacted waters

    Science.gov (United States)

    Sibrell, P.L.; Chambers, M.A.; Deaguero, A.L.; Wildeman, T.R.; Reisman, D.J.

    2007-01-01

    Although mine drainage is usually thought of as acidic, there are many cases where the water is of neutral pH, but still contains metal species that can be harmful to human or aquatic animal health, such as manganese (Mn) and zinc (Zn). Typical treatment of mine drainage waters involves pH adjustment, but this often results in excessive sludge formation and removal of nontoxic species such as magnesium and calcium. Theoretical consideration of the stability of metal carbonate species suggests that the target metals could be removed from solution by coprecipitation with calcium carbonate. The U.S. Geological Survey has developed a limestone-based process for remediation of acid mine drainage that increases calcium carbonate saturation. This treatment could then be coupled with carbonate coprecipitation as an innovative method for removal of toxic metals from circumneutral mine drainage waters. The new process was termed the carbonate coprecipitation (CCP) process. The CCP process was tested at the laboratory scale using a synthetic mine water containing 50 mg/L each of Mn and Zn. Best results showed over 95% removal of both Mn and Zn in less than 2 h of contact in a limestone channel. The process was then tested on a sample of water from the Palmerton zinc superfund site, near Palmerton, Pennsylvania, containing over 300 mg/L Zn and 60 mg/L Mn. Treatment of this water resulted in removal of over 95% of the Zn and 40% of the Mn in the limestone channel configuration. Because of the potential economic advantages of the CCP process, further research is recommended for refinement of the process for the Palmerton water and for application to other mining impacted waters as well. ?? Mary Ann Liebert, Inc.

  16. Environmental impact of the Ranger uranium mine, Alligator Rivers Region, Northern Territory, Australia

    International Nuclear Information System (INIS)

    Johnston, A.; Needham, S.

    2002-01-01

    Stringent environmental controls have been applied to the Ranger mine, in the Northern Territory of Australia, because of its location in an area of outstanding natural and cultural values. The adjacent Kakadu National Park contains a wild and extensive biodiversity, striking landscapes, ancient Aboriginal rock art and a living Aboriginal culture. A special regime of biological, radiological and chemical monitoring has been applied to protect the environment and detect even very low intensity impacts. The results from this regime demonstrate to the government and general public that the high conservation values of the national park around the mine are being properly protected. This paper describes the techniques used to measure environmental impact at Ranger, and summarizes the results of over 20 years of monitoring. The overwhelming conclusion is that a very high standard of environmental protection has been achieved. (author)

  17. COMPARISON OF THE ENVIRONMENTAL IMPACT OF DIFFERENT METHODS OF MINING WASTE DISPOSAL TECHNOLOGY USING AHP METHOD

    Directory of Open Access Journals (Sweden)

    Justyna Kubicz

    2016-05-01

    Full Text Available Exploitation of tailing ponds sites for storing all types of waste materials creates multiple problems concerning waste disposal and the environmental impact of the waste. Tailing ponds waste may comprise e.g. flotation tailings from ore enrichment plants. Despite the fact that companies / corporations use state-of-the-art methods of extraction and processing of copper ore, and introduce modern systems of organization and production management, the area located closest to the reservoir is exposed to its negative effects. Many types of waste material are a valuable source of secondary raw materials which are suitable for use by various industries. Examples of such materials are mining waste (flotation tailings, usually neutral to the environment, whose quantities produced in the process of exploitation of minerals is sizeable. The article compares different technological methods of mining waste disposal using AHP method and their environmental impact.

  18. L’IMPACT DE L’APPLICATION DES REFORMES BALE III SUR L’INDUSTRIE BANCAIRE ROUMAINE

    Directory of Open Access Journals (Sweden)

    Maria Halep

    2012-12-01

    Full Text Available Le début du XXIème a connu un essor remarquable des marchés financiers, de l’innovation et des processus de déréglementation. L’inflation faible, la liquidité abondante, la confiance dans les marchés efficaces et autorégulateurs ont conduit à une perception généralisée de risque faible, incitant les acteurs à une prise accrue de risque. Face aux crises qui s’enchaînent depuis maintenant cinq ans, des mesures de ré-réglementation du système ont été proposées, communément appelées Reformes de Bâle.L’article analyse l’évolution des recommandations de Bâle en lien avec l’évolution économique et des marchés financiers et évalue l’impact de ces dernières sur le secteur bancaire roumain.

  19. The impacts of the Samarco mine tailing spill on the Rio Doce estuary, Eastern Brazil.

    Science.gov (United States)

    Gomes, Luiz Eduardo de Oliveira; Correa, Lucas Barreto; Sá, Fabian; Neto, Renato Rodrigues; Bernardino, Angelo Fraga

    2017-07-15

    Over 50 million cubic meters of mining tailings were released in the Rio Doce basin after the collapse of the Fundão dam (Samarco) in November 2015. Predicting significant impacts on the Rio Doce estuary, we sampled sediments to investigate short-term impacts on the benthic assemblages and trace metal accumulation on estuarine sediments. With the arrival of the tailing plumes in the estuary, we detected a predominance of clay particles and increased trace metal concentrations of up to 5 times in some areas. The rapid sedimentation after the impact also impacted estuarine macrofaunal assemblages through loss surface-dwelling taxa. As expected, the impacts on benthic assemblages observed up to 3days after the arrival of tailings were not clearly associated with trace metal concentrations, but long-term effects need to be studied. We recommend that the high spatial variability within the estuary be considered in future impact assessment studies. Copyright © 2017 Elsevier Ltd. All rights reserved.

  20. Impact of oil shale mining and mine closures on hydrological conditions of North-East Estonian rivers

    International Nuclear Information System (INIS)

    Raetsep, A.; Liblik, V.

    2004-01-01

    The attention is focused on the formation of hydrological and hydrogeological interconnections between the catchment areas of Purtse, Rannapungerja, Puhajoe and Vasavere rivers after closing (in 1997-2002) and flooding the Ahtme, Tammiku, Sompa and Kohtla oil shale underground mines. The multivariate relationship between the changes in mine water amounts directed into the rivers, annual runoff due to mine water inlets, groundwater underground flow, outflow module and other factors (as variables) were studied. A complex of linear regression formulas was derived to calculate the amounts of mine water outputs into the rivers and water distribution in order to regulate the hydrological regime of investigated rivers. (author)

  1. Integrating human health into environmental impact assessment: case studies of Canada's Northern mining resource sector

    International Nuclear Information System (INIS)

    Noble, B.F.; Bronson, J.E.

    2005-01-01

    This paper examines the integration of human health considerations into environmental impact assessment (EIA) in the Canadian North. Emphasis is placed on the northern mining sector, where more land has been staked in the past decade than in the previous 50 years combined. Using information from interviews with northern EIA and health practitioners and reviews of selected project documents, we examined three principal mining case studies, northern Saskatchewan uranium mining operations, the Ekati diamond project, and the Voisey's Bay mine/mill project, to determine whether and how health considerations in EIA have evolved and the current nature and scope of health integration. Results suggest that despite the recognized link between environment and health and the number of high-profile megaprojects in Canada's North, human health, particularly social health, has not been given adequate treatment in northern EIA. Health considerations in EIA have typically been limited to physical health impacts triggered directly by project-induced environmental change, while social and other health determinants have been either not considered at all, or limited to those aspects of health and well-being that the project proponent directly controlled, namely employment opportunities and worker health and safety. In recent years, we have been seeing improvements in the scope of health in EIA to reflect a broader range of health determinants, including traditional land use and culture. However, there is still a need to adopt impact mitigation and enhancement measures that are sensitive to northern society, to monitor and follow up actual health impacts after project approval, and to ensure that mitigation and enhancement measures are effective. (author)

  2. Social impact assessment in mining projects in Northern Finland: Comparing practice to theory

    Energy Technology Data Exchange (ETDEWEB)

    Suopajärvi, Leena, E-mail: leena.suopajarvi@ulapland.fi

    2013-09-15

    The paper discusses social impact assessments (SIA) for mining projects in light of the international principles and guidelines for such assessments and the academic literature in the field. The data consist of environmental impact assessment (EIA) programmes and reports for six mining projects that have started up in northern Finland in the 2000s. A first observation is that the role of the SIAs in the EIA programmes and reports studied was quite minor: measured in number of pages, the assessments account for three or four percent of the total. This study analyses the data collection, research methodology and conceptual premises used in the SIAs. It concludes that the assessments do not fully meet the high standards of the international principles and guidelines set out for them: for example, elderly men are over-represented in the data and no efforts were made to identify and bring to the fore vulnerable groups. Moreover, the reliability of the assessments is difficult to gauge, because the qualitative methods are not described and where quantitative methods were used, details such as non-response rates to questionnaires are not discussed. At the end of the paper, the SIAs are discussed in terms of Jürgen Habermas' theory of knowledge interests, with the conclusion that the assessments continue the empirical analytical tradition of the social sciences and exhibit a technical knowledge interest. -- Highlights: • Paper investigates social impact assessments in Finnish mining projects. • Role of social impact assessment is minor in whole EIA-process. • Mining SIAs give the voice for elderly men, vulnerable groups are not identified. • Assessment of SIAs is difficult because of lacking transparency in reporting. • SIAs belong to empirical analytical tradition with technical knowledge interest.

  3. Social impact assessment in mining projects in Northern Finland: Comparing practice to theory

    International Nuclear Information System (INIS)

    Suopajärvi, Leena

    2013-01-01

    The paper discusses social impact assessments (SIA) for mining projects in light of the international principles and guidelines for such assessments and the academic literature in the field. The data consist of environmental impact assessment (EIA) programmes and reports for six mining projects that have started up in northern Finland in the 2000s. A first observation is that the role of the SIAs in the EIA programmes and reports studied was quite minor: measured in number of pages, the assessments account for three or four percent of the total. This study analyses the data collection, research methodology and conceptual premises used in the SIAs. It concludes that the assessments do not fully meet the high standards of the international principles and guidelines set out for them: for example, elderly men are over-represented in the data and no efforts were made to identify and bring to the fore vulnerable groups. Moreover, the reliability of the assessments is difficult to gauge, because the qualitative methods are not described and where quantitative methods were used, details such as non-response rates to questionnaires are not discussed. At the end of the paper, the SIAs are discussed in terms of Jürgen Habermas' theory of knowledge interests, with the conclusion that the assessments continue the empirical analytical tradition of the social sciences and exhibit a technical knowledge interest. -- Highlights: • Paper investigates social impact assessments in Finnish mining projects. • Role of social impact assessment is minor in whole EIA-process. • Mining SIAs give the voice for elderly men, vulnerable groups are not identified. • Assessment of SIAs is difficult because of lacking transparency in reporting. • SIAs belong to empirical analytical tradition with technical knowledge interest

  4. Flow dependent water quality impacts of historic coal and oil shale mining in the Almond River catchment, Scotland

    International Nuclear Information System (INIS)

    Haunch, Simon; MacDonald, Alan M.; Brown, Neil; McDermott, Christopher I.

    2013-01-01

    Highlights: • A GIS map of coal and oil shale mining in the Almond basin was constructed. • Water quality data confirms the continued detrimental impact of historic mining. • Oil shale mining is confirmed as a contributor to poor surface water quality. • Surface water flow affects mine contaminant chemistry, behaviour and transport. • River bed iron precipitate is re-suspended and transported downstream at high flow. - Abstract: The Almond River catchment in Central Scotland has experienced extensive coal mining during the last 300 years and also provides an example of enduring pollution associated with historic unconventional hydrocarbon exploitation from oil shale. Detailed spatial analysis of the catchment has identified over 300 abandoned mine and mine waste sites, comprising a significant potential source of mine related contamination. River water quality data, collected over a 15 year period from 1994 to 2008, indicates that both the coal and oil shale mining areas detrimentally impact surface water quality long after mine abandonment, due to the continued release of Fe and SO 4 2- associated with pyrite oxidation at abandoned mine sites. Once in the surface water environment Fe and SO 4 2- display significant concentration-flow dependence: Fe increases at high flows due to the re-suspension of river bed Fe precipitates (Fe(OH) 3 ); SO 4 2- concentrations decrease with higher flow as a result of dilution. Further examination of Fe and SO 4 loading at low flows indicates a close correlation of Fe and SO 4 2- with mined areas; cumulative low flow load calculations indicate that coal and oil shale mining regions contribute 0.21 and 0.31 g/s of Fe, respectively, to the main Almond tributary. Decreases in Fe loading along some river sections demonstrate the deposition and storage of Fe within the river channel. This river bed Fe is re-suspended with increased flow resulting in significant transport of Fe downstream with load values of up to 50 g/s Fe

  5. Environmental impact of coal mining on the natural environment in Poland

    International Nuclear Information System (INIS)

    Wysocka, M.; Chalupnik, S.; Michalik, B.; Skowronek, J.; Skubacz, K.

    2002-01-01

    Saline waters occurring in underground coal mines in Poland often contain natural radioactive isotopes, mainly 226 Ra from uranium series and 228 Ra from thorium series. Approximately 40% of total amount of radium remains underground in a form of radioactive deposits, but 225 MBq of 226 Ra and 400 MBq of 228 Ra are released daily to the rivers with mine effluents. Technical measures as spontaneous precipitation of radium in gobs, decreasing of amounts of water inflows into underground working etc. have been undertaken in several coal mines and as the result total amount of radium released to the surface waters diminished of about 60% during last 5-6 years. Mine waters can cause a severe impact on the natural environment, mainly due to its salinity. But also the enhancement of radium concentration in river waters, bottom sediments and vegetation is observed. Sometimes radium concentration in rivers exceeds 0.7 kBq/m 3 , which is due to Polish law a permissible level for waste waters. The extended investigations were performed in all coal mines and on this basis the radium balance in effluents has been calculated. Measurements done in the vicinity of mine water's settling ponds and in rivers gave us an opportunity to survey radium behaviour in river waters and the range of contamination. Solid waste materials with enhanced natural radioactivity have been produced in huge amounts in power and coal industries in Poland. There are two main sources of these waste products. As a result of combustion of coal in power plants low radioactive waste materials are produced, with 226 Ra concentration seldom exceeding few hundreds of Bq/kg. Different situation is observed in coal mines, where as a result of precipitation of radium from radium-bearing waters radioactive deposits are formed. Sometimes natural radioactivity of such materials is very high, in case of scaling from coal mines radium concentration may reach 400 000 Bq/kg - similar activity as for 3% uranium ore

  6. Environmental impact assessment for uranium mine, mill and in situ leach projects

    International Nuclear Information System (INIS)

    1997-11-01

    Environmental impact assessments and/or statements are an inherent part of any uranium mining project and are a prerequisite for the future opening of an exploitation and its final closure and decommissioning. Since they contain all information related to the physical, biological, chemical and economic condition of the areas where industrial projects are proposed or planned, they present invaluable guidance for the planning and implementation of environmental mitigation as well as environmental restoration after the mine is closed. They further yield relevant data on the socio-economic impacts of a project. The present report provides guidance on the environmental impact assessment of uranium mining and milling projects, including in situ leach projects which will be useful for companies in the process of planning uranium developments as well as for the regional or national authorities who will assess such developments. Additional information and advice is given through environmental case histories from five different countries. Those case histories are not meant to be prescriptions for conducting assessments nor even firm recommendations, but should serve as examples for the type and extent of work involved in assessments. A model assessment and licensing process is recommended based on the experience of the five countries

  7. The Finnis River. A natural laboratory of mining impact- past, present and future

    Energy Technology Data Exchange (ETDEWEB)

    Markich, S J; Jeffree, R A [eds.

    2002-03-01

    The Rum Jungle uranium-copper mine in tropical northern Australia has been a source of acid rock drainage contaminants since the 1950s, which have had adverse impacts on the receiving waters of the Finniss River. Mine site remediation began in 1982 followed by long-term monitoring of water quality and flow, based on daily measurements within the Finniss River system. A decade or more after the initiation of these remedial activities, a set of investigations have been completed that have measured the post-remedial ecological status of the Finniss River system, relative to this environmental benchmark. These studies have also been complemented by studies on various other ecological endpoints. Moreover, the Finniss River system has provided unique opportunities for broader scientific goals to be pursued. Because it has been so well-monitored, it can be viewed as a natural laboratory to investigate the impacts of acid rock drainage on tropical freshwater biodiversity. The scientific papers presented at this symposium address a broad spectrum of issues that are directly related to environmental sustainability and mining. The topics range across future contaminant scenarios and their predicted ecological impacts, the various metrics used to assess ecological detriment to biodiversity, the abilities of laminated biological structures to act as archives of pollution history, and also spin-off applications in environmental and wildlife management. Furthermore, the participation of many stakeholders in open discussion during the symposium provided an important set of views and opinions on the needs for future studies in the Finniss River system.

  8. Environmental impact assessment for uranium mine, mill and in situ leach projects

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    Environmental impact assessments and/or statements are an inherent part of any uranium mining project and are a prerequisite for the future opening of an exploitation and its final closure and decommissioning. Since they contain all information related to the physical, biological, chemical and economic condition of the areas where industrial projects are proposed or planned, they present invaluable guidance for the planning and implementation of environmental mitigation as well as environmental restoration after the mine is closed. They further yield relevant data on the socio-economic impacts of a project. The present report provides guidance on the environmental impact assessment of uranium mining and milling projects, including in situ leach projects which will be useful for companies in the process of planning uranium developments as well as for the regional or national authorities who will assess such developments. Additional information and advice is given through environmental case histories from five different countries. Those case histories are not meant to be prescriptions for conducting assessments nor even firm recommendations, but should serve as examples for the type and extent of work involved in assessments. A model assessment and licensing process is recommended based on the experience of the five countries. 1 fig., 5 tabs.

  9. The Finnis River. A natural laboratory of mining impact- past, present and future

    International Nuclear Information System (INIS)

    Markich, S.J.; Jeffree, R.A.

    2002-03-01

    The Rum Jungle uranium-copper mine in tropical northern Australia has been a source of acid rock drainage contaminants since the 1950s, which have had adverse impacts on the receiving waters of the Finniss River. Mine site remediation began in 1982 followed by long-term monitoring of water quality and flow, based on daily measurements within the Finniss River system. A decade or more after the initiation of these remedial activities, a set of investigations have been completed that have measured the post-remedial ecological status of the Finniss River system, relative to this environmental benchmark. These studies have also been complemented by studies on various other ecological endpoints. Moreover, the Finniss River system has provided unique opportunities for broader scientific goals to be pursued. Because it has been so well-monitored, it can be viewed as a natural laboratory to investigate the impacts of acid rock drainage on tropical freshwater biodiversity. The scientific papers presented at this symposium address a broad spectrum of issues that are directly related to environmental sustainability and mining. The topics range across future contaminant scenarios and their predicted ecological impacts, the various metrics used to assess ecological detriment to biodiversity, the abilities of laminated biological structures to act as archives of pollution history, and also spin-off applications in environmental and wildlife management. Furthermore, the participation of many stakeholders in open discussion during the symposium provided an important set of views and opinions on the needs for future studies in the Finniss River system

  10. Impact of peat mining, and restoration on methane turnover potentials and methane-cycling microorganisms in a northern bog

    NARCIS (Netherlands)

    Reumer, Max; Harnisz, M.; Lee, H.J.; Reim, A.; Grunert, O.; Putkinen, A.; Fritze, H.; Bodelier, P.L.E.; Ho, A.

    2018-01-01

    Ombrotrophic peatlands are a recognized global carbon reservoir. Without restoration and peat regrowth, harvested peatlands are dramatically altered, impairing its carbon sink function, with consequences for methane turnover. Previous studies determined the impact of commercial mining on the peat

  11. Due Diligence Processes for Public Acquisition of Mining-Impacted Landscapes

    Science.gov (United States)

    Martin, E.; Monohan, C.; Keeble-Toll, A. K.

    2016-12-01

    The acquisition of public land is critical for achieving conservation and habitat goals in rural regions projected to experience continuously high rates of population growth. To ensure that public funds are utilized responsibly in the purchase of conservation easements appropriate due diligence processes must be established that limit landowner liability post-acquisition. Traditional methods of characterizing contamination in regions where legacy mining activities were prevalent may not utilize current scientific knowledge and understanding of contaminant fate, transport and bioavailability, and therefore are likely to have type two error. Agency prescribed assessment methods utilized under CERLA in many cases fail to detect contamination that presents liability issues by failing to require water quality sampling that would reveal offsite transport potential of contaminants posing human health risks, including mercury. Historical analysis can be used to inform judgmental sampling to identify hotspots and contaminants of concern. Land acquisition projects at two historic mine sites in Nevada County, California, the Champion Mine Complex and the Black Swan Preserve have established the necessity of re-thinking due diligence processes for mining-impacted landscapes. These pilot projects demonstrate that pre-acquisition assessment in the Gold Country must include judgmental sampling and evaluation of contaminant transport. Best practices using the current scientific knowledge must be codified by agencies, consultants, and NGOs in order to ensure responsible use of public funds and to safeguard public health.

  12. Analysis of the planned post-mining landscape of MIBRAG's open-cast mines with regard to a possible environmental impact of alteration processes in mixed dumps

    Energy Technology Data Exchange (ETDEWEB)

    Jolas, P.; Hofmann, B. [Mitteldeutsche Braunkohlengesellschaft, Theissen (Germany)

    2010-07-01

    There has been an increasing body of knowledge with regard to hydro- and geochemical alteration processes in overburden dumps and their impact on groundwater quality in lignite mining and reclamation operations associated with post-mining landscapes in Germany. The operators of the MIBRAG mines have examined issues regarding alteration processes and how they affect the environment and which opportunities exist to actively influence the dumping process. The objectives were to counteract any possible negative impact of the alteration processes. Special emphasis was on the impact caused by oxidation of sulfur containing minerals. This paper presented an analysis of the situation at United Schleenhain Mine and how it reflects on the work to date for MIBRAG's mines. A future outlook was also presented. Specifically, the paper discussed the development of the United Schleenhain mine and the post-mining landscape. The potential for discharge of substances was also evaluated along with acidification. 1 tab., 5 figs.

  13. Construction of a new plant in Gabon by the Compagnie des Mines d'Uranium de Franceville: Three years' experience of operation

    International Nuclear Information System (INIS)

    Jug, V.

    1987-01-01

    As part of a programme to modernize and extend its means of production which had already commenced with the setting up of a solvent extraction unit in 1977, and a sulphuric acid production facility of increased capacity (60 t/d) in 1980, the Compagnie des Mines d'Uranium de Franceville (COMUF) started a new uranium ore treatment plant in 1982. The aim was to replace the older installation built in 1959-60, which had reached the limit of its capacity and whose largest equipment was in need of renewal. The new installations are capable of an annual uranium production of 1500 t of magnesium uranate. The techniques adopted were the most modern, those likely to simplify the process and improve operating costs, namely semi-autogenous grinding and solid-liquid separation using band filters. Three years of operating experience confirm the sound choice of the main options made when designing the installations. The treatment performances, especially those which are independent of the nature of the ore, and the reliability of operation are indeed excellent. Thanks to a training programme started in the late 1980s the staff adapted rapidly to the new technical environment and it has been possible to run the entire plant with almost exclusively Gabonese staff. (author). 1 tab

  14. determinants de l'adoption et impact des varietes ameliorees sur la ...

    African Journals Online (AJOL)

    ACSS

    C'est ainsi que la recherche a créé des nouvelles variétés ... La recherche en économie de la production agricole a montré que les taux d'adoption et les facteurs influençant la décision des agriculteurs d'adopter une technologie agricole varient fortement entre ..... des agriculteurs sur l'innovation sont fortement liées aux ...

  15. Impacts de l'utilisation des Engrais chimiques sur les cultures ...

    African Journals Online (AJOL)

    L'analyse des résultats a montrée que Solanum macrocarpum et amarantus hybridus sont les légumes les plus cultivés respectivement 69% et 21% à cause de leurs préférences dans l'alimentation des consommateurs.Les proportions des maraîchers utilisant les engrais chimiques ou non ou encore les deux couplés sont ...

  16. Impact of the Heat Transfer on the Performance Calculations of Automotive Turbocharger Compressor Influence des transferts thermiques sur le calcul des performances des compresseurs de suralimentation

    Directory of Open Access Journals (Sweden)

    Chesse P.

    2011-09-01

    Full Text Available Usually, turbochargers used within internal combustion engine simulation software are modelled in an adiabatic manner. However, during our experimental tests we found that this is not necessarily the case. The direct use of the manufacturer’s map is not possible anymore. A simple method which considers the heat transfers is proposed. It is based on experimental tests made on hot air supplied turbocharger test bench. The difference with the adiabatic model is considerable mainly for low compressor power. This corresponds to internal combustion engine low loads. En général, les turbocompresseurs pris en compte dans les logiciels de simulation moteur sont modélisés de façon adiabatique. Cependant, les tests expérimentaux effectués au laboratoire montrent que ce n’est pas toujours le cas. L’utilisation directe des champs de fonctionnement fournis par les constructeurs de turbomachines n’est alors plus possible. Une évaluation quantitative de ces transferts, basée sur des tests réalisés sur un banc d’essais turbo à air chaud, est présentée. Puis ils sont pris en compte afin de calculer les caractéristiques réelles de fonctionnement d’un compresseur. La différence avec le modèle adiabatique apparaît très importante pour les faibles puissances compresseur. Ceci correspond aux faibles charges moteur.

  17. Rubbish tips rehabilitation. Degradation mechanisms and impacts; Rehabilitation des decharges. Mecanismes de degradation et impacts

    Energy Technology Data Exchange (ETDEWEB)

    Chassagnac, Th. [CSZ AZUR, 69 - Lyon (France)

    2005-06-01

    Waste storage activity really started in the beginning of the industrial era when the consumption of goods has led to a production of wastes higher than the environment assimilation capacity. The waste storage and disposal activity has led to environmental impacts and risks which need to be evaluated and, if needed, processed. Waste storage remains the most common way of wastes elimination because of its simpleness and low cost. However, the closing down of sites is today strictly controlled by the law and the rehabilitation problems concerns mainly the ancient sites. The waste storage domain is at the crossroads of multiple scientific domains like: hydrogeology, rudology, biology, hydraulics and hydrology, water and gases processing, ecology, health sciences and risk assessments, and thus requires a multi-disciplinary approach. This article deals with the rehabilitation of rubbish tips and presents: 1 - the typology and regulatory evolution of waste storage centers; 2 - the main pollutants, their mechanisms and way of impact on the environment: typology of pollutants (origin and nature; mobility influencing factors; risk, hazard, exposure and impact notions); impacts on air (origin and mechanism of biogas generation, biogas composition, mass status of biogas production, risks linked with biogas); impact on waters (leachates; hydric status; impact on groundwaters; impact on surface waters; impact on soils and natural ecosystems; other harmful effects: aesthetics, noise, vermin; stability). (J.S.)

  18. Evaluation of naturally occurring pigments of the North Bohemian lignite mining area; Bewertung von mineralischen Pigmentvorkommen des nordboehmischen Braunkohlenbeckens

    Energy Technology Data Exchange (ETDEWEB)

    Buntenbach, Stephan [TriMin Consulting - Mineral Processing, Ammerthal (Germany); Botula, Jiri [VSB-Technical Univ. of Ostrava (Czech Republic). Mineral Processing Dept.; Leonhardt, Hana

    2010-11-15

    The research project ''Mineral Processing Methods for the Preparation of Naturally Occurring Pigments from Overburden of the Lignite Mines and from Shallow Clay Deposits of the North Bohemian Lignite Basin'', funded by the Deutsche Bundesstiftung Umwelt DBU, was conducted as a collaboration between the AKW Apparate+Verfahren GmbH, Hirschau with the Technical University of Ostrava. Geological, mineralogical and mineral processing studies for the development of a suitable beneficiation method were carried out to investigate the possibilities of the industrial usage of beneficiated pigments of these deposits. It should be demonstrated, that the significant reserves of mineral pigments in the shallow deposits and also in the overburden of the lignite mines can be utilized ecologically and economically. Based on the results of geological prospecting work already carried out, the deposit Horenec was selected as the most important pigment deposits for the production of bolus and ochre earth. The newly carried out geological, mineralogical and chemical studies formed the basis for the following mineral processing test work and the test work for the usage of beneficiated products as colouring paint for plastic, fabric and other materials. (orig.)

  19. Recovery and reuse of sludge from active and passive treatment of mine drainage-impacted waters: a review.

    Science.gov (United States)

    Rakotonimaro, Tsiverihasina V; Neculita, Carmen Mihaela; Bussière, Bruno; Benzaazoua, Mostafa; Zagury, Gérald J

    2017-01-01

    The treatment of mine drainage-impacted waters generates considerable amounts of sludge, which raises several concerns, such as storage and disposal, stability, and potential social and environmental impacts. To alleviate the storage and management costs, as well as to give the mine sludge a second life, recovery and reuse have recently become interesting options. In this review, different recovery and reuse options of sludge originating from active and passive treatment of mine drainage are identified and thoroughly discussed, based on available laboratory and field studies. The most valuable products presently recovered from the mine sludge are the iron oxy-hydroxides (ochre). Other by-products include metals, elemental sulfur, and calcium carbonate. Mine sludge reuse includes the removal of contaminants, such as As, P, dye, and rare earth elements. Mine sludge can also be reused as stabilizer for contaminated soil, as fertilizer in agriculture/horticulture, as substitute material in construction, as cover over tailings for acid mine drainage prevention and control, as material to sequester carbon dioxide, and in cement and pigment industries. The review also stresses out some of the current challenges and research needs. Finally, in order to move forward, studies are needed to better estimate the contribution of sludge recovery/reuse to the overall costs of mine water treatment.

  20. Dams: impacts on the species diversity; Impacts des reservoirs sur la biodiversite

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Domingos de [Quebec Univ., Montreal, PQ (Canada). Dept. de Sciences Biologiques, Inst. de Sciences de l`Environnement

    1996-12-31

    Always you change one ecosystem, you have impacts on the species diversity. The work try to show some impacts of dams for hydroelectric power generation. First of all the author analyses the impacts on the habitats and ecosystems. He considers the problems on a variety of species, since plants and animals that living on the border of the river until the fishes, birds, invertebrates and the mammals. The example of 3 dams, La Grande, Opinaca and Caniapiseau, on Quebec, Canada, are used to give support to the work 14 refs., 1 tab.

  1. Uranium mining in Australia

    International Nuclear Information System (INIS)

    Anon.

    1984-01-01

    The mining of uranium in Australia is criticised in relation to it's environmental impact, economics and effects on mine workers and Aborigines. A brief report is given on each of the operating and proposed uranium mines in Australia

  2. Mine Ventilation System Variable Resistance Regulate Air Quantity Economy and Its Impacts on Artisanal Mine in Ivory Coast

    Directory of Open Access Journals (Sweden)

    Kouame Kouame Arthur Joseph

    2016-01-01

    Full Text Available The artisanal gold mining is one of the major illegal activities in Ivory Coast. Thousands of indigents and foreigners including men, women and children are involved in this dangerous activity. Contracting contagious diseases such as HIV/AIDS and multiple lung diseases are commonplace on the artisanal mining sites due to air pollution. For this reason, the differential analysis, research mine ventilation system by changing the working windage adjustment for air flow of the economy, identifies factors, obtained discriminant variable resistance air volume control economic quantitative criteria for underground actual situation of joint variable resistance method and economic variable resistance than the concept of the development of effective mine ventilation system to improve air quantity adjusting rheostat economical way. The findings of this study can help lead to better safety practices in mining in order to improve the health and safety of the miners who are involved in artisanal mining activities in Ivory Coast and other mining sites over the world.

  3. Technical and Sociological Investigation of Impacts in Using Lignite Mine Drainage for Irrigation - A Case Study

    Science.gov (United States)

    Murugappan, A.; Manoharan, A.; Senthilkumar, G.; Krishnamurthy, J.

    2017-07-01

    Irrigated farming depends on an ample supply of water compatible quality. Presently, a lot of irrigation projects have to depend on inferior quality and not so enviable sources of water supply. In order to prevent troubles during usage of such water supplies of poor quality, there must be meticulous preparation to ensure that the water available with such quality characteristics is put to best use. The effect of water quality upon soil and crops must be better understood in choosing fitting options to manage with impending water quality associated troubles that might decrease soil and crop productivity under existing circumstances of water use. Two tanks (small sized reservoirs) namely, Walajah Tank and Perumal Tank in Cuddalore District, used for irrigation, receive mine drainage water pumped out continuously from the open cast lignite mines of the NLC India Limited, Neyveli, Tamilnadu State. This water has been used by the farmers in the irrigated commands of both Walajah Tank and Perumal Tank for more than three decades. Recently, the beneficiaries had raised fears on the quality of mine drainage waters they had been using for raising crops in the commands of both the tanks. They opined that the coal dust laden mine water used for irrigation had affected the crop yields. This incited us to take up a study to (i) assess the status of quality of surface waters released from the two tanks for irrigation in the respective command areas and (ii) assess the likely impacts of quality of water on soil and on growth and productivity of crops cultivated in the command areas. Further to the technical evaluation of the impacts, a structured questionnaire survey was also conducted among the farmers and the common public in the study area. The findings of the survey confirmed with the outcome of the technical assessment in that the mine drainage had a poor impact in the cultivable command area of Walajah tank system while such impacts were less significant in most parts of

  4. Impact of mine waste dumps on growth and biomass of economically important crops.

    Science.gov (United States)

    Mathiyazhagan, Narayanan; Natarajan, Devarajan

    2012-11-01

    The present study aimed to investigate the effect of magnesite and bauxite waste dumps on growth and biochemical parameters of some edible and economically important plants such as Vigna radiata, V. mungo, V. unguiculata, Eleusine coracana, Cajanus cajan, Pennisetum glaucum, Macrotyloma uniflorum, Oryza sativa, Sorghum bicolour, Sesamum indicum, Ricinus communis, Brassica juncea, Gossypium hirsutum and Jatropha curcas. The growth rate of all the crops was observed in the range of 75 to 100% in magnesite and 15 to 100% in bauxite mine soil. The moisture content of roots and shoots of all the crops were in the range of 24 to 77, 20 to 88% and 42 to 87, 59 to 88% respectively. The height of the crops was in the range of 2.6 to 48 cm in magnesite soil and 3 to 33 cm in bauxite soil. Thus the study shows that both mine soils reflects some physical and biomolecule impact on selected crops.

  5. Possibility of applying mechanized coal mining in the mine 'Soko', with the comparative advantages of production results and impact

    Directory of Open Access Journals (Sweden)

    Denić Miodrag

    2014-01-01

    Full Text Available Mining method applied in the RMU 'Soko', is repeatedly technologically modified and reached the maximum limit in terms of productivity, level of job performance and safety at work. And all the other methods, which are in the technological process of obtaining coal rely on the technology of drilling-blasting works, in terms of the mine 'Soko', can not allow mass production of coal, regarding natural and technical-technological conditions prevailing in Sokobanja coal basin. Therefore, this paper proposes a possible solution which would enable a significant increase in annual production by appling mechanized coal mining system.

  6. The Impact of Mining Activity upon the Aquatic Environment in the Southern Apuseni Mountains

    Directory of Open Access Journals (Sweden)

    SIGISMUND DUMA

    2009-01-01

    Full Text Available In the Southern Apuseni Mountains, mining activities have taken place since Antiquity, leaving their marks upon the natural environment, the aquatic one inclusively. If the traditional technologies had a low impact upon the aquatic environment, the ones in the modern period have affected it up to the “dead water” level. It is about the disorganization of the hydrographical basins and especially about aggressive pollution of surface waters with some of the most toxic chemical substances such as cyanides, as well as by an increase in the contents of metallic ions, chlorides, sulphides, sulphates, suspensions and fixed residuum. The decrease in pH, and implicitly the acidification of waters, is also remarkable. It must be mentioned that no systematic studies of the impact of mining activities upon the aquatic environment have been conducted in the area in the last years. In these conditions, the data about water quality have been taken over from the studies conducted by author between 1996 and 1998. The cause of the lack of concern in the field is no other but the cease in ore valorization activities in the majority of the mining objectives in the area. As none of the tailings settling ponds has guard canals, the direct pluvial waters and the ones drained from the slopes transport tailings with noxes which they subsequently discharge in the local pluvial network. In these conditions, both the quality of the mine waters which run freely into the emissary and of the ones that flow from the waste dumps remain mainly in the qualitative parameters analyzed and presented in the study.

  7. Development of a diatom-based multimetric index for acid mine drainage impacted depressional wetlands.

    Science.gov (United States)

    Riato, Luisa; Leira, Manel; Della Bella, Valentina; Oberholster, Paul J

    2018-01-15

    Acid mine drainage (AMD) from coal mining in the Mpumalanga Highveld region of South Africa has caused severe chemical and biological degradation of aquatic habitats, specifically depressional wetlands, as mines use these wetlands for storage of AMD. Diatom-based multimetric indices (MMIs) to assess wetland condition have mostly been developed to assess agricultural and urban land use impacts. No diatom MMI of wetland condition has been developed to assess AMD impacts related to mining activities. Previous approaches to diatom-based MMI development in wetlands have not accounted for natural variability. Natural variability among depressional wetlands may influence the accuracy of MMIs. Epiphytic diatom MMIs sensitive to AMD were developed for a range of depressional wetland types to account for natural variation in biological metrics. For this, we classified wetland types based on diatom typologies. A range of 4-15 final metrics were selected from a pool of ~140 candidate metrics to develop the MMIs based on their: (1) broad range, (2) high separation power and (3) low correlation among metrics. Final metrics were selected from three categories: similarity to reference sites, functional groups, and taxonomic composition, which represent different aspects of diatom assemblage structure and function. MMI performances were evaluated according to their precision in distinguishing reference sites, responsiveness to discriminate reference and disturbed sites, sensitivity to human disturbances and relevancy to AMD-related stressors. Each MMI showed excellent discriminatory power, whether or not it accounted for natural variation. However, accounting for variation by grouping sites based on diatom typologies improved overall performance of MMIs. Our study highlights the usefulness of diatom-based metrics and provides a model for the biological assessment of depressional wetland condition in South Africa and elsewhere. Copyright © 2017 Elsevier B.V. All rights reserved.

  8. The impact of unconfined mine tailings in residential areas from a mining town in a semi-arid environment: Nacozari, Sonora, Mexico.

    Science.gov (United States)

    Meza-Figueroa, Diana; Maier, Raina M; de la O-Villanueva, Margarita; Gómez-Alvarez, Agustín; Moreno-Zazueta, Alan; Rivera, Jacinto; Campillo, Alberto; Grandlic, Christopher J; Anaya, Ricardo; Palafox-Reyes, Juan

    2009-09-01

    Past mining activities in northern Mexico left a legacy of delerict landscapes devoid of vegetation and seasonal formation of salt efflorescence. Metal content was measured in mine tailings, efflorescent salts, soils, road dust, and residential soils to investigate contamination. Climatic effects such as heavy wind and rainfall events can have great impact on the dispersion of metals in semi-arid areas, since soils are typically sparsely vegetated. Geochemical analysis of this site revealed that even though total metal content in mine tailings was relatively low (e.g. Cu= 1000 mg kg(-1)), metals including Mn, Ba, Zn, and Cu were all found at significantly higher levels in efflorescence salts formed by evaporation on the tailings impoundment surface following the rainy season (e.g. Cu= 68,000 mg kg(-1)). Such efflorescent fine-grained salts are susceptible to wind erosion resulting in increased metal spread to nearby residential soils. Our results highlight the importance of seasonally dependent salt-formation and wind erosion in determining risk levels associated with potential inhalation or ingestion of airborne particulates originating from contaminated sites such as tailings impoundments. In low metal-content mine tailings located in arid and semi-arid environments, efflorescence salts could represent a human health risk and a challenge for plant establishment in mine tailings.

  9. OGM : vers une évaluation des impacts agri-environnementaux

    Directory of Open Access Journals (Sweden)

    Icart Jean-Claude

    2000-07-01

    Full Text Available En 1998, les pouvoirs publics français prononçaient un moratoire de deux ans concernant les autorisations de mise sur le marché des variétés de colza génétiquement modifiées. Cette décision donnait suite aux conclusions de la conférence des citoyens des 20 et 21 juin 1998 à l’Assemblée nationale et aux recommandations de l’Office parlementaire des choix scientifiques et technologiques, fondées sur « les incertitudes liées à la diffusion de transgène dans l’environnement à partir de plantes comme le colza, présentant des risques de croisements avec d’autres espèces ».

  10. Development of a diatom-based multimetric index for acid mine drainage impacted depressional wetlands

    CSIR Research Space (South Africa)

    Riato, L

    2018-01-01

    Full Text Available Acid mine drainage (AMD) from coal mining in the Mpumalanga Highveld region of South Africa has caused severe chemical and biological degradation of aquatic habitats, specifically depressional wetlands, as mines use these wetlands for storage of AMD...

  11. Hydrologic analyses in support of the Navajo Generating Station–Kayenta Mine Complex environmental impact statement

    Science.gov (United States)

    Leake, Stanley A.; Macy, Jamie P.; Truini, Margot

    2016-06-01

    IntroductionThe U.S. Department of Interior’s Bureau of Reclamation, Lower Colorado Region (Reclamation) is preparing an environmental impact statement (EIS) for the Navajo Generating Station-Kayenta Mine Complex Project (NGS-KMC Project). The proposed project involves various Federal approvals that would facilitate continued operation of the Navajo Generating Station (NGS) from December 23, 2019 through 2044, and continued operation of the Kayenta Mine and support facilities (collectively called the Kayenta Mine Complex, or KMC) to supply coal to the NGS for this operational period. The EIS will consider several project alternatives that are likely to produce different effects on the Navajo (N) aquifer; the N aquifer is the principal water resource in the Black Mesa area used by the Navajo Nation, Hopi Tribe, and Peabody Western Coal Company (PWCC).The N aquifer is composed of three hydraulically connected formations—the Navajo Sandstone, the Kayenta Formation, and the Lukachukai Member of the Wingate Sandstone—that function as a single aquifer. The N aquifer is confined under most of Black Mesa, and the overlying stratigraphy limits recharge to this part of the aquifer. The N aquifer is unconfined in areas surrounding Black Mesa, and most recharge occurs where the Navajo Sandstone is exposed in the area near Shonto, Arizona. Overlying the N aquifer is the D aquifer, which includes the Dakota Sandstone, Morrison Formation, Entrada Sandstone, and Carmel Formation. The aquifer is named for the Dakota Sandstone, which is the primary water-bearing unit.The NGS is located near Page, Arizona on the Navajo Nation. The KMC, which delivers coal to NGS by way of a dedicated electric railroad, is located approximately 83 miles southeast of NGS (about 125 miles northeast of Flagstaff, Arizona). The Kayenta Mine permit area is located on about 44,073 acres of land leased within the boundaries of the Hopi and Navajo Indian Reservations. KMC has been conducting mining and

  12. Impact de la qualité de l'audit externe sur la liquidité des titres des entreprises tunisiennes cotées

    OpenAIRE

    Faten Hakim Ghorbel

    2008-01-01

    Cette recherche a pour objectif d'étudier l'impact de la qualité d'audit externe sur la liquidité. Nous appréhendons la qualité d'audit dans le cadre de notre étude par "la qualité de l'auditeur", et notamment de son indépendance et de ses compétences. Après avoir contrôlé l'effet d'autres variables censées, d'après la théorie, influencer la liquidité, les tests effectués ont permis de dégager une relation positive entre l'appartenance des auditeurs à un réseau international (Big 4), la spéci...

  13. Anticipated radiological impacts from the mining and milling of thorium for the nonproliferative fuels

    International Nuclear Information System (INIS)

    Meyer, H.R.; Till, J.E.

    1978-01-01

    Recent emphasis on proliferation-resistant fuel cycles utilizing thorium--uranium-233 fuels has necessitated evaluation of the potential radiological impact of mining and milling thorium ore. Therefore, an analysis has been completed of hypothetical mine-mill complexes using population and meteorological data representative of a thorium resource site in the Lemhi Pass area of Idaho/Montana, United States of America. Source terms for the site include thorium-232 decay chain radionuclides suspended as dusts and radon-220 and daughters initially released as gas. Fifty-year dose commitments to maximally exposed individuals of 2.4 mrem to total body, 9.5 mrem to bone, and 35 mrem to lungs are calculated to result from facility operation. Radium-228, thorium-228, thorium-232 and lead-212 (daughter of radon-220) are found to be the principal contributors to dose. General population doses for a 50-mile radius surrounding the facility are estimated to be 0.05 man-rem to total body, 0.1 man-rem to bone, and 0.7 man-rem to lungs. Generally speaking, the results of this study indicate that the radiological aspects of thorium mining and milling should pose no significant problems with regard to implementation of thorium fuel cycles

  14. Environmental impact of noise levels in and around opencast bauxite mine.

    Science.gov (United States)

    Kisku, G C; Barman, S C; Kidwai, M M; Bhargava, S K

    2002-01-01

    Until recently, noise pollution has not been paid adequate attention as air, water and land pollution. In order to assess (predict) the impact of bauxite mine noise on employees health and in and around bauxite mine environment, general noise sources and equipment noise were monitored. All these noise sources were compared with prescribed standard noise levels laid down by Central Pollution Control Board (CPCB). Data has also been compared with reference site, north block hill top which is barren and virgin plateau/top covered with grass only and free from human interference. Equipment noise levels were much higher than the other zone of the mine which does not have the corresponding standards. Rock breaker recorded the highest noise level with 73.1 +/- 14.2 to 89.5 +/- 10.1 dB (A) while from ripper dozer it was least with 61.0 +/- 17.3 to 76.2 +/- 6.2 dB (A). Meteorological parameters did not have much influence upon equipment noise up to 100 feet from the source.

  15. Feasibility of a continuous surface mining machine using impact breakers. First quarterly report, October 1-December 31, 1979

    Energy Technology Data Exchange (ETDEWEB)

    Fisk, A. T.

    1980-01-01

    This is the first quarterly report on the efforts to evaluate the feasibility of excavating coal and overburden from surface mines using impact breakers. The initial stages of the project are devoted to a literature search, equipment selection, test site selection, and conceptual test system design. Hence, this report details the progress made in these areas; the next quarter will see the finalization of Phase I. Included as appendices to this report are FMA internal reports on the individual mines visited. These reports are the basis of the test site selection, and have been censored here to remove data the mine operators deemed as confidential.

  16. Impact of herbaceous vegetation on the enzymatic activity of coal mining wastes

    Energy Technology Data Exchange (ETDEWEB)

    Osmanczyk, D

    1980-01-01

    Differences in the enzymatic activity of reclaimed and crude dump wastes after coal mining were investigated. Due to the increased activity of six investigated enzymes (dehydrogenase, catalase, saccharase, BETA-glucosidase, urease and asparaginase), a favourable impact of herbaceous vegetation on the biological activation of the breeding-ground was noticed. Particularly in the case of sacharase and BETA-glucosidase, an increase of the enzymatic activity at a rate of several times or even more than ten times speaks not only for an adequate increase of the metabolic rate of carbohydrates but also for specific properties of the habitat which favours an adsorption of these enzymes. (6 refs.) (In Polish)

  17. Spatial unmixing for environmental impact monitoring of mining using UAS and WV-2

    Science.gov (United States)

    Delalieux, S.; Livens, S.; Goossens, M.; Reusen, I.; Tote, C.

    2012-04-01

    The three principal activities of the mineral resources mining industry - mining, mineral processing and metallurgical extraction - all produce waste. The environmental impact of these activities depends on many factors, in particular, the type of mining and the size of the operation. The effects of the mining (extraction) stage tend to be mainly local, associated with surface disturbance, the production of large amounts of solid waste material, and the spread of chemically reactive particulate matter to the atmosphere and hydrosphere. Many studies have shown the potential of remote sensing for environmental impact monitoring, e.g., [1]. However, its applicability has been limited due to the inherent spatial-spectral and temporal trade-off of most sensors. More recently, miniaturization of sensors makes it possible to capture color images from unmanned aerial systems (UAS) with a very high spatial resolution. In addition, the UAS can be deployed in a very flexible manner, allowing high temporal resolution imaging. More detailed spectral information is available from multispectral images, albeit at lower spatial resolution. Combining both types of images using image fusion can help to overcome the spatial-spectral trade-off and provide a new tool for more detailed monitoring of environmental impacts. Within the framework of the ImpactMin project, funded by the Framework Programme 7 of the European Commission, the objective of this study is to implement and apply the spatial unmixing algorithm, as proposed by [2], on images of the 'Vihovici Coal Mine' area, located in the Mostar Valley, Bosnia and Herzegovina. A WorldView2 (WV2) satellite image will be employed, which provides 8-band multispectral data at a spatial resolution of 2m. High spatial resolution images, obtained by a SmartPlanes UAS, will provide RGB data with 0.05m spatial resolution. The spatial unmixing technique is based on the idea that a linear mixing model can be used to perform the downscaling of

  18. Assessment of Groundwater Supply Impacts for a Mine Site in Western Turkey

    Science.gov (United States)

    Agartan, E.; Yazicigil, H.

    2010-12-01

    A nickel mine located in Turgutlu town in Western Turkey requires 135 L/s of water for the mining processes. The initial studies pointed out that part of the supply will be met by pumping water from the Turgutlu-Salihli aquifer system. The purpose of this study is to assess the impacts associated with meeting groundwater supply requirements for the mine. Scope of the study involved development of the groundwater flow model of the Turgutlu-Salihli aquifer system, determination of the alternative groundwater pumping scenarios, assessment of the impacts associated with each scenario and selection of the most feasible scenario in the aspect of environmental and technical factors. Turgutlu town is located in one of the most tectonically active areas in Turkey which is characterized by an E-W trending Gediz Graben formed as a result of N-S directed extension. Gediz River as a major surface water resource in the study area flows from east to west, passes through Gediz Graben and is connected to the Turgutlu-Salihli aquifer system. Quaternary deposits and Neogene rocks, showing better aquifer properties than the other formations of the Gediz Graben, form the Turgutlu-Salihli aquifer system. Quaternary deposits form the principal aquifer, and Neogene rocks form the secondary aquifer in the study area. Therefore, a two layered groundwater flow model of the Turgutlu-Salihli aquifer system was established using MODFLOW. The model was calibrated under steady state conditions assuming that the conditions in 1991 prior to the significant development represented a pseudo-steady state in the aquifer system. Calibration was carried out for hydraulic conductivity, recharge and boundary conditions. To get today’s groundwater levels, wells being drilled after 1991 were added to the model. In the scope of this study, two potential scenarios were considered, and their effects on the aquifer systems were evaluated. The locations of the scenario wells were determined so that they will

  19. Psycho-Social Issues in Mine Emergencies: The Impact on the Individual, the Organization and the Community

    Directory of Open Access Journals (Sweden)

    Kathleen M. Kowalski-Trakofler

    2012-06-01

    Full Text Available This paper draws on research conducted in the past two decades examining issues related to the human element in mine disasters. While much of the emergency response community employs a systems approach that takes into account psychosocial issues as they impact all aspects of an emergency, the mining industry has lagged behind in integrating this critical element. It is only within the past few years that behavioral interventions have begun to be seen as a part of disaster readiness and resiliency in the industry. The authors discuss the potential applications of psychosocial studies and suggest ways to improve mine emergency planning, psychological support, and decision-making during a response, as well as actions in the aftermath of incidents. Topics covered, among others, include an economic rationale for including such studies in planning a mine emergency response, sociological issues as they impact such things as leadership and rescue team dynamics, and psychological issues that have an effect on individual capacity to function under stress such as during escape, in refuge alternatives, and in body recovery. This information is intended to influence the mine emergency escape curriculum and impact actions and decision-making during and after a mine emergency. The ultimate goal is to mitigate the trauma experienced by individuals, the organization, and the community.

  20. A numerical calculation method of environmental impacts for the deep sea mining industry - a review.

    Science.gov (United States)

    Ma, Wenbin; van Rhee, Cees; Schott, Dingena

    2018-03-01

    Since the gradual decrease of mineral resources on-land, deep sea mining (DSM) is becoming an urgent and important emerging activity in the world. However, until now there has been no commercial scale DSM project in progress. Together with the reasons of technological feasibility and economic profitability, the environmental impact is one of the major parameters hindering its industrialization. Most of the DSM environmental impact research focuses on only one particular aspect ignoring that all the DSM environmental impacts are related to each other. The objective of this work is to propose a framework for the numerical calculation methods of the integrated DSM environmental impacts through a literature review. This paper covers three parts: (i) definition and importance description of different DSM environmental impacts; (ii) description of the existing numerical calculation methods for different environmental impacts; (iii) selection of a numerical calculation method based on the selected criteria. The research conducted in this paper provides a clear numerical calculation framework for DSM environmental impact and could be helpful to speed up the industrialization process of the DSM industry.

  1. 77 FR 1080 - Notice of Intent To Prepare an Environmental Impact Statement for the Proposed Copper Flat Mine...

    Science.gov (United States)

    2012-01-09

    ... District Office, Las Cruces, New Mexico, intends to prepare an Environmental Impact Statement (EIS) and by...] Notice of Intent To Prepare an Environmental Impact Statement for the Proposed Copper Flat Mine Plan of...: In compliance with the National Environmental Policy Act (NEPA) of 1969, as amended, and the Federal...

  2. Formation of neogenic ores on the dump-heaps of old uranium mines and on the mine-head of mines under exploitation; Formation de mineraux neogenes sur les haldes d'anciennes mines d'uranium et sur le carreau des mines en exploitation

    Energy Technology Data Exchange (ETDEWEB)

    Chervet, J [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1960-07-01

    The aim of this preliminary study is to assess straight away the major degradations suffered by primary and secondary uranium ores under the weathering action of air and water. The uranium ores concerned in this case are those stored in the open air. The pyritic ores are the most vulnerable: the interactions between the pyrite, or rather its oxidation products, and the uraniferous compounds are liable to lead to the formation of neogenic ores, which are of considerable importance in the natural lixiviation of uranium ore stocks. (author) [French] Cette etude preliminaire a pour but de fixer des a present les degradations majeures que subissent les mineraux d'uranium primaires et secondaires, sous l'action de l'air et des eaux meteoriques. Il s'agit en l'occurence des mineraux d'uranium constituant les minerais entreposes a l'air libre. Les minerais pyriteux sont les plus vulnerables: les interactions entre la pyrite ou plutot de ses produits d'oxydation avec les composes uraniferes sont susceptibles de former des mineraux neogenes dont l'importance est considerable dans la lixiviation naturelle des stocks de minerais d'uranium. (auteur)

  3. The psychosocial impacts of fly-in fly-out and drive-in drive-out mining on mining employees: a qualitative study.

    Science.gov (United States)

    Torkington, Amanda May; Larkins, Sarah; Gupta, Tarun Sen

    2011-06-01

    To explore how fly-in fly-out (FIFO) and drive-in drive-out (DIDO) mining affects the psychosocial well-being of miners resident in a rural north Queensland town as well as the sources of support miners identify and use in managing these effects. A descriptive qualitative study, using semistructured interviews. Charters Towers, a rural town in north Queensland, and a remote north-western Queensland mine. Eleven people, resident in or near Charters Towers, currently or formerly employed in FIFO or DIDO mining. Self-reported effects on psychosocial well-being and sources of support. Participants reported positive and negative psychosocial impacts across domains including family life, relationships, social life, work satisfaction, mood, sleep and financial situation. Concerns about the impact on participants' partners were described. Awareness of onsite support, such as Employee Assistance Programs, varied. Other supports included administration staff and nurses or medics. Trusted friends or colleagues at the mine site were considered a preferred means of support. Some, but not most, had experienced coworkers discussing problems with them. A reluctance to seek support was described, with a number of barriers identified. Those having problems might not recognise their own stress and thus not seek support. This study identifies numerous psychosocial impacts on FIFO/DIDO miners and their partners, and provides insights into preferences regarding support. Employee Assistance Programs cannot be relied upon as the sole means of support. Further studies exploring the impact upon and supports for FIFO/DIDO workers and their partners will assist in better understanding these issues. © 2011 The Authors. Australian Journal of Rural Health © National Rural Health Alliance Inc.

  4. Bioaccumulation of trace elements in fish as an early detection of impact from uranium mining

    International Nuclear Information System (INIS)

    Sauerland, C.; Buckle, D.; Humphrey, C.; Jones, D.R.

    2006-01-01

    The open-cut Ranger uranium mine is located in the Alligator Rivers Region about 250 km east of Darwin, northern Australia. In this paper we evaluate a two-decade time series of monitoring data to assess bioaccumulation of contaminants in fish collected from the first permanent water body downstream of the mine (Mudginberri Billabong) and from a control site (Sandy Billabong). Due to the potential for enrichment of some contaminants in fish tissues, the bioaccumulation monitoring can provide early warning of levels of metals that could impact on human health. A review of long-term monitoring data, ranging from 1980 (pre-mining) to 2003, of selected metals (cadmium, copper, lead, manganese, uranium and zinc) revealed that none of these contaminants have significantly increased over time, and that fish tissue concentrations are similar for Mudginberri Billabong and Sandy Billabong. Most copper and zinc tissue concentrations are above the generally expected levels for fish flesh at both the 'impact' and control site (i.e. the 90th percentile of the Australian National Residue Survey Results, 2003) reflecting the naturally higher metal and radionuclide concentrations in the Alligator Rivers Region. Lead concentrations in all fish flesh studied are below the maximum level of 0.5 mg/kg wet weight (Australian and New Zealand food standards). Concentrations of the selected metals are higher in viscera than in flesh. This indicates their potential to bioaccumulate in fish, which is also consistent with the published literature. In all fish analysed in this study, concentrations of uranium and manganese are lower than for copper, lead and zinc. In recent years (2000, 2002 and 2003) fish tissues were analysed more comprehensively for a suite of over 20 contaminants in flesh, liver, gill and bone tissues. Interestingly, the metals appeared to accumulate in specific fish organs: aluminium was highest in gill; barium, lead, manganese and uranium were highest in bones; and

  5. Degré d'impact des aménagements hydrauliques sur le ...

    African Journals Online (AJOL)

    La variation se fait en fonction des conditions écologiques et des mauvaises conditions de gestion de la terre par l'homme. C'est pourquoi la lutte ... De nombreux chercheurs se sont penchés pour traiter ce problème ; que ce soit dans l'aspect de quantification que dans celui de la lutte anti-érosive. Nous avons tenté ...

  6. Selenium transformation in coal mine spoils: Its environmental impact assessment. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Harness, J.; Atalay, A.; Koll, K.J.; Zhang, H.; Maggon, D.

    1991-12-31

    The objective of this program was to conduct an environmental impact assessment study for selenium from coal mine spoils. The use of in-situ lysimetry to predict selenium speciation, transformation, and mobility under natural conditions was evaluated. The scope of the study was to construct and test field-scale lysimeter and laboratory mini-column to assess mobility and speciation of selenium in coal mine overburden and soil systems; to conduct soil and groundwater sampling throughout the state of Oklahoma for an overall environmental impact assessment of selenium; and to conduct an in-depth literature review on the solubility, speciation, mobility, and toxicity of selenium from various sources. Groundwater and surface soil samples were also collected from each county in Oklahoma. Data collected from the lysimeter study indicated that selenium in the overburden of the abandoned mine site was mainly found in the selenite form. The amount of selenite found was too low and immobile to be of concern to the environment. The spoil had equilibrated long enough (over 50 years) that most of the soluble forms of selenium have already been lost. Examination of the overburden indicated the presence of pyrite crystals that precipitated over time. The laboratory mini-column study indicated that selenite is quite immobile and remained on the overburden material even after leaching with dilute acid. Data from groundwater samples indicated that based on the current permissible level for selenium in groundwater (0.01 mg Se/L), Oklahoma groundwater is widely contaminated with the element. However, according to the new regulation (0.05 mg Se/L), which is to be promulgated in 1992, only 9 of the 77 counties in the state exceed the limit.

  7. Impacts of historical mining in the Coeur d'Alene River Basin

    Science.gov (United States)

    Balistrieri, Laurie S.; Box, Stephen E.; Bookstrom, Arthur A.; Hooper, Robert L.; Mahoney, J. Brian

    2010-01-01

    Mining began in the late 1880s in the Coeur d'Alene mining district in northern Idaho (fig. 1). Although only two mines, the Galena and Lucky Friday, currently are operating, more than 90 historical mines exist in this region (Bennett and others, 1989).

  8. Environmental Impact Assessment of Sand Mining from the Small Catchment Rivers in the Southwestern Coast of India: A Case Study

    Science.gov (United States)

    Sreebha, Sreedharan; Padmalal, Damodaran

    2011-01-01

    In the past few decades, the demand for construction grade sand is increasing in many parts of the world due to rapid economic development and subsequent growth of building activities. This, in many of the occasions, has resulted in indiscriminate mining of sand from instream and floodplain areas leading to severe damages to the river basin environment. The case is rather alarming in the small catchment rivers like those draining the southwestern coast of India due to limited sand resources in their alluvial reaches. Moreover, lack of adequate information on the environmental impact of river sand mining is a major lacuna challenging regulatory efforts in many developing countries. Therefore, a scientific assessment is a pre-requisite in formulating management strategies in the sand mining-hit areas. In this context, a study has been made as a case to address the environmental impact of sand mining from the instream and floodplain areas of three important rivers in the southwestern coast of India namely the Chalakudy, Periyar and Muvattupuzha rivers, whose lowlands host one of the fast developing urban-cum-industrial centre, the Kochi city. The study reveals that an amount of 11.527 million ty-1 of sand (8.764 million ty-1 of instream sand and 2.763 million ty-1 of floodplain sand) is being mined from the midland and lowland reaches of these rivers for construction of buildings and other infrastructural facilities in Kochi city and its satellite townships. Environmental Impact Assessment (EIA) carried out as a part of this investigation shows that the activities associated with mining and processing of sands have not only affected the health of the river ecosystems but also degraded its overbank areas to a large extent. Considering the degree of degradation caused by sand mining from these rivers, no mining scenario may be opted in the deeper zones of the river channels. Also, a set of suggestions are made for the overall improvement of the rivers and its

  9. Impact de la mise en places des comités d'audit dans les banques tunisiennes

    OpenAIRE

    Sonda Marrakchi Chtourou; Sana Ben Hassine

    2006-01-01

    International audience; Dans le cadre de la présente étude, nous proposons d'investiguer l'impact de la création du comité d'audit sur certains éléments du système de gouvernance des banques tunisiennes. Plus particulièrement, ces éléments concernent le fonctionnement du conseil d'administration, la qualité de l'information financière produite, l'indépendance de l'auditeur interne, la qualité du contrôle interne ainsi que l'étendue des travaux d'audit externe planifiés. A cet effet, l'étude d...

  10. Impact of mining projects on the socio-economics of the region

    International Nuclear Information System (INIS)

    Rao, K.R.; Yerpude, R.R.

    1994-01-01

    Mining of mineral deposits, if exploited economically, would generate prospects of significant employment of non-inflationary nature, in developing countries. Exploitation of remotely located mineral deposits contributes in developing inaccessible regions thereby improving socio-economics of the region benefiting the local inhabitants and supplementing the efforts towards national integration. However, an indifferent attitude of the project management towards environment and welfare of local population will result in clash of interests and perpetual litigations which not only impede progress of the project but also lead to law and order problems. A precondition for successful implementation of any project is to understand the possible impact it has, on the socio-economics of the region and educate the local inhabitants to derive optimum advantage from the project. In this paper, two cases of mining projects, one located remotely and the other close to a well developed city are studied and their impact on the socio-economics of the respective regions is presented. 5 refs., 2 figs., 1 tab

  11. Review of the environmental impact of mining and milling of uranium ores

    International Nuclear Information System (INIS)

    Costello, J.M.; Davy, D.R.; Cattell, F.C.R.; Cook, J.E.

    1980-01-01

    This review examines some of the environmental impacts of uranium mining and milling including use of natural resources, resulting effluents and the health of uranium workers and the general public. Impacts are expressed in terms of a gigawatt year of electricity (GWe y) generated in a light water reactor (LWR) using the uranium in a once-through fuel cycle. Conclusions of this study are: the actual environmental effects from uranium mining and milling will be site specific; the number of premature deaths from occupational causes is estimated to be between 0.3 and 0.7 per GWe y of energy produced in an LWR with a once through fuel cycle, and of this number between 0.03 and 0.12 per GWe y may arise from cancer associated with radiation exposure and between 0.25 and 0.48 from accidents, and the remainder may result from exposure to siliceous dusts; the number of premature deaths among the general public per GWe y is estimated to be between 0.02 and 0.12 from cancer associated with radiation exposure; and by way of comparison, exposure to a natural background radiation level of 1 mSv y -1 (100 mrem y -1 ) for one year may ultimately lead to an inferred 7 to 30 premature deaths from cancer per million of population, using the same limits of proportionality. In the US, at present rates of consumption, 1 million people use about 1.2 GWe y annually

  12. Impact of earthworms on trace element solubility in contaminated mine soils amended with green waste compost

    Energy Technology Data Exchange (ETDEWEB)

    Sizmur, Tom, E-mail: t.p.sizmur@reading.ac.uk [Soil Research Centre, Dept. Geography and Environmental Science, School of Human and Environmental Sciences, University of Reading, Whiteknights, Reading, RG6 6DW (United Kingdom); Palumbo-Roe, Barbara [British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham, NG12 5GG (United Kingdom); Hodson, Mark E. [Soil Research Centre, Dept. Geography and Environmental Science, School of Human and Environmental Sciences, University of Reading, Whiteknights, Reading, RG6 6DW (United Kingdom)

    2011-07-15

    The common practice of remediating metal contaminated mine soils with compost can reduce metal mobility and promote revegetation, but the effect of introduced or colonising earthworms on metal solubility is largely unknown. We amended soils from an As/Cu (1150 mgAs kg{sup -1} and 362 mgCu kg{sup -1}) and Pb/Zn mine (4550 mgPb kg{sup -1} and 908 mgZn kg{sup -1}) with 0, 5, 10, 15 and 20% compost and then introduced Lumbricus terrestris. Porewater was sampled and soil extracted with water to determine trace element solubility, pH and soluble organic carbon. Compost reduced Cu, Pb and Zn, but increased As solubility. Earthworms decreased water soluble Cu and As but increased Pb and Zn in porewater. The effect of the earthworms decreased with increasing compost amendment. The impact of the compost and the earthworms on metal solubility is explained by their effect on pH and soluble organic carbon and the environmental chemistry of each element. - Graphical abstract: Display Omitted Highlights: > Compost reduced the mobility of Cu, Pb and Zn. > Compost increased the mobility of As. > Earthworms decreased water soluble As and Cu but increased Pb and Zn in porewater. > These effects are explained by the impact of the earthworms and compost on pH and DOC. - The effect of earthworms on metal solubility was due to changes in dissolved organic carbon and pH but was reduced with increasing compost amendments.

  13. Impact of earthworms on trace element solubility in contaminated mine soils amended with green waste compost

    International Nuclear Information System (INIS)

    Sizmur, Tom; Palumbo-Roe, Barbara; Hodson, Mark E.

    2011-01-01

    The common practice of remediating metal contaminated mine soils with compost can reduce metal mobility and promote revegetation, but the effect of introduced or colonising earthworms on metal solubility is largely unknown. We amended soils from an As/Cu (1150 mgAs kg -1 and 362 mgCu kg -1 ) and Pb/Zn mine (4550 mgPb kg -1 and 908 mgZn kg -1 ) with 0, 5, 10, 15 and 20% compost and then introduced Lumbricus terrestris. Porewater was sampled and soil extracted with water to determine trace element solubility, pH and soluble organic carbon. Compost reduced Cu, Pb and Zn, but increased As solubility. Earthworms decreased water soluble Cu and As but increased Pb and Zn in porewater. The effect of the earthworms decreased with increasing compost amendment. The impact of the compost and the earthworms on metal solubility is explained by their effect on pH and soluble organic carbon and the environmental chemistry of each element. - Graphical abstract: Display Omitted Highlights: → Compost reduced the mobility of Cu, Pb and Zn. → Compost increased the mobility of As. → Earthworms decreased water soluble As and Cu but increased Pb and Zn in porewater. → These effects are explained by the impact of the earthworms and compost on pH and DOC. - The effect of earthworms on metal solubility was due to changes in dissolved organic carbon and pH but was reduced with increasing compost amendments.

  14. Restoration as mitigation: analysis of stream mitigation for coal mining impacts in southern Appalachia.

    Science.gov (United States)

    Palmer, Margaret A; Hondula, Kelly L

    2014-09-16

    Compensatory mitigation is commonly used to replace aquatic natural resources being lost or degraded but little is known about the success of stream mitigation. This article presents a synthesis of information about 434 stream mitigation projects from 117 permits for surface mining in Appalachia. Data from annual monitoring reports indicate that the ratio of lengths of stream impacted to lengths of stream mitigation projects were <1 for many projects, and most mitigation was implemented on perennial streams while most impacts were to ephemeral and intermittent streams. Regulatory requirements for assessing project outcome were minimal; visual assessments were the most common and 97% of the projects reported suboptimal or marginal habitat even after 5 years of monitoring. Less than a third of the projects provided biotic or chemical data; most of these were impaired with biotic indices below state standards and stream conductivity exceeding federal water quality criteria. Levels of selenium known to impair aquatic life were reported in 7 of the 11 projects that provided Se data. Overall, the data show that mitigation efforts being implemented in southern Appalachia for coal mining are not meeting the objectives of the Clean Water Act to replace lost or degraded streams ecosystems and their functions.

  15. Is Europe Falling Behind in Data Mining? Copyright’s Impact on Data Mining in Academic Research

    NARCIS (Netherlands)

    Handke, C.; Guibault, L.; Vallbé, J.J.; Schmidt, B.; Dobreva, M.

    2015-01-01

    With the diffusion of digital information technology, data mining (DM) is widely expected to increase the productivity of all kinds of research activities. Based on bibliometric data, we demonstrate that the share of DM-related research articles in all published academic papers has increased

  16. THE IMPACT ASSESSMENT OF THE ABANDONED URANIUM MINING EXPLOITATIONS ON ROCKS AND SOILS - ZIMBRU PERIMETER, ARAD COUNTY

    Directory of Open Access Journals (Sweden)

    DIANA M. BANU

    2016-10-01

    Full Text Available The mining exploration and exploitation, especially the activity of uranium mineralization exploration and exploitation has a negative impact on the environment by the alterations of the landscape and the degradation of the environmental factors' quality. The principal environmental factors that could be affected by mining operations resulting from uranium exploitation are: water, air, soil, population, fauna, and flora. The aim of this study is, first, to identify the sources of pollution (natural radionuclides - natural radioactive series of uranium, radium, thorium, potassium and heavy metals that are accompanying the mineralizations for two of the most important environmental factors: rocks and soils: and, second, to assess the pollution impact on those two environmental factors. In order to identify this pollutants and their impact assessment it was selected as a study case an abandoned uranium mining perimeter named the Zimbru perimeter located in Arad County, Romania.

  17. La demande de bois-énergie à Ouagadougou : esquisse d’évaluation de l’impact physique et des échecs des politiques de prix

    Directory of Open Access Journals (Sweden)

    Boukary Ouedraogo

    2006-03-01

    Full Text Available Cet article vise à évaluer non seulement la demande de bois-énergie de la ville de Ouagadougou, l’impact de cette demande sur le patrimoine forestier de l’aire d’approvisionnement de cette ville, mais aussi l’esquisse d’une évaluation des échecs des politiques de prix du bois-énergie. Les méthodes d’évaluation de la consommation de cette source d’énergie sont passées en revue au regard des conditions d’offre de la ressource et des données existantes sur la demande de cette ressource. Les données sur les inventaires forestiers de l’aire d’approvisionnement de Ouagadougou en bois-énergie, ainsi que des enquêtes sur les ménages et les artisans ont permis d’estimer la consommation de Ouagadougou en bois-énergie et son impact sur l’épuisement des ressources forestières du pays.This paper aims at evaluating not only the wood-energy demand of Ouagadougou, the physic impact of this city wood energy consumption on the forest of its provisioning area, together with the causes of wood-energy price policy failures. The evaluation’s methods of wood energy consumption are reviewed in comparison with the resource supply conditions and the availability on data of wood resource demand. The data on the forest inventories of the wood-energy provisioning surface of Ouagadougou, as well as investigations into the households and the craftsmen allows estimating the consumption of Ouagadougou in wood-energy and its impact on the forest resources’ depletion. some complementary analysis have been done on the main causes of wood energy price policy failures.

  18. Les impacts humains des changements organisationnels autour des TIC Human impacts of organizational changes based on ITC Impactos humanos de los cambios organizacionales en torno a los TIC

    Directory of Open Access Journals (Sweden)

    Robert Picard

    2007-10-01

    Full Text Available La taille des systèmes mis en place dans les grandes organisations, leur caractère exogène par rapport aux pratiques de l’entreprise (progiciels de gestion intégrés, posent des défis relativement nouveaux, difficiles à relever pour les acteurs. En effet, les métiers des informaticiens comme ceux des utilisateurs en sont le plus souvent profondément affectés.Les informaticiens doivent réviser leur mode d’action, révision qui s’accompagne d’une moindre autonomie, d’exigences de coopération plus élevées, et d’une multidisciplinarité à laquelle ils n’ont pas nécessairement été préparés.Les professionnels utilisateurs peuvent perdre des repères professionnels historiques, changement accompagné d’une révision des pratiques, de la modification des structures et de l’environnement de travail. Ils doivent parfois acquérir de nouvelles qualifications, de façon coûteuse, et certains peuvent perdre leur travail.Ces problématiques seront illustrées par deux situations concrètes très récentes, observées dans un grand groupe de service, pour chacune des populations.Many organizational changes are related to (or initiated by the introduction of information and communication technology (ICT tools.The size of the systems implemented in large organizations, their external nature vis-à-vis the company’s practices (Enterprise Resource Planning are rather new challenges, which are difficult for the actors to tackle. In fact, the jobs of data processing people as well as of professional users are often the most affected.Data processing people must revise their way of doing things, a change that is accompanied by a loss of autonomy and greater demands for cooperation and multidisciplinarity that they are not necessarily prepared for.Professional users may lose some historical guidelines, a change that is accompanied by a review of their practices, organizational changes, and changes in the work environment. They

  19. Coal mining situation in the Federal Republic of Germany. The 1st quarter 2016; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. 1. Vierteljahr 2016

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-06-06

    The paper reports on the coal mining in the Federal Republic of Germany in the 1st quarter of 2016. Statistical data are presented for mining, exports and imports of hard coal and lignite and for employees.

  20. Coal mining situation in the Federal Republic of Germany. The 1st quarter 2015; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. 1. Vierteljahr 2015

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-07-07

    The paper reports on the coal mining in the Federal Republic of Germany in the 1st quarter of 2015. Statistical data are presented for mining, exports and imports of hard coal and lignite and for employees.

  1. Coal mining situation in the Federal Republic of Germany. The 1st quarter 2017; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. 1. Vierteljahr 2017

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2017-06-14

    The paper reports on the coal mining in the Federal Republic of Germany in the 1st quarter of 2017. Statistical data are presented for mining, exports and imports of hard coal and lignite and for employees.

  2. Risques et impacts environnementaux des retenues d’altitude pour la production de neige de culture dans un contexte de changement climatique

    Directory of Open Access Journals (Sweden)

    Stéphanie Gaucherand

    2011-10-01

    Full Text Available Les retenues d’altitude sont des ouvrages hydrauliques implantés dans les stations de loisirs de montagne et destinés à créer une réserve d’eau, dédiée principalement à la production de neige de culture. Leur implantation en altitude en fait indubitablement des retenues spécifiques, subissant et induisant des risques et des impacts sur leur environnement anthropique et écologique. Le Cemagref a engagé un projet de recherche sur la sûreté des retenues d’altitude. Le présent article est issu de ces travaux et vise à établir un état des lieux des risques liés aux retenues d’altitude et de leurs impacts sur l’environnement. Il replace le développement des retenues d’altitude dans leurs contextes sociétal, social et environnemental. Il développe ensuite les risques et impacts des retenues d’altitude, en focalisant son analyse sur les différents risques et aléas spécifiques auxquels sont exposés les ouvrages, et sur les différents impacts environnementaux liés à la réalisation et la gestion des retenues.Mountain reservoirs are hydraulic structures implanted in recreational mountain resorts designed to provide a water reserve mainly used for the production of artificial snow. Their implantation in high-altitude zones makes them highly specific reservoirs subjected to and inducing risks and impacts on their human and ecological environment. Based on in-depth bibliographic and field research, Cemagref has launched a study on mountain reservoirs. The present article aims to establish the current state of the risks related to mountain reservoirs and their impacts on the environment, placing the development of mountain reservoirs in their societal, social, and environmental contexts. It will then develop mountain reservoir risks and impacts, focusing on the specific risks and uncertainties to which these structures are exposed, and the different environmental impacts related to the construction and management of

  3. Coal mining situation in the Federal Republic of Germany. Year 2016; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Jahr 2016

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2017-03-03

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2016. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  4. Situation of coal mining in the Federal Republic of Germany. Year 2014; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Jahr 2014

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-03-10

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2014. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  5. Coal mining situation in the Federal Republic of Germany. Year 2015; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Jahr 2015

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-03-08

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2015. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  6. Coal mining situation in the Federal Republic of Germany. Year 2017; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Jahr 2017

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2018-03-12

    The paper reports on the coal mining in the Federal Republic of Germany in the year 2017. Statistical data are presented for coal market, brown coal mining as well as the hard coal mining. These data consider the supply and demand of coal in Germany, and employees of the German coal industry.

  7. Long-term integrated river basin planning and management of water quantity and water quality in mining impacted catchments

    Science.gov (United States)

    Pohle, Ina; Zimmermann, Kai; Claus, Thomas; Koch, Hagen; Gädeke, Anne; Uhlmann, Wilfried; Kaltofen, Michael; Müller, Fabian; Redetzky, Michael; Schramm, Martina; Schoenheinz, Dagmar; Grünewald, Uwe

    2015-04-01

    During the last decades, socioeconomic change in the catchment of the Spree River, a tributary of the Elbe, has been to a large extent associated with lignite mining activities and the rapid decrease of these activities in the 1990s. There are multiple interconnections between lignite mining and water management both in terms of water quantity and quality. During the active mining period a large-scale groundwater depression cone has been formed while river discharges have been artificially increased. Now, the decommissioned opencast mines are being transformed into Europe's largest man-made lake district. However, acid mine drainage causes low pH in post mining lakes and high concentrations of iron and sulphate in post mining lakes and the river system. Next to potential changes in mining activities, also the potential impacts of climate change (increasing temperature and decreasing precipitation) on water resources of the region are of major interest. The fundamental question is to what extent problems in terms of water quantity and water quality are exacerbated and whether they can be mitigated by adaptation measures. In consequence, long term water resource planning in the region has to formulate adaptation measures to climate change and socioeconomic change in terms of mining activities which consider both, water quantity and water quality aspects. To assess potential impacts of climate and socioeconomic change on water quantity and water quality of the Spree River catchment up to the Spremberg reservoir in the scenario period up to 2052, we used a model chain which consists of (i) the regional climate model STAR (scenarios with a further increase in temperature of 0 and 2 K), (ii) mining scenarios (mining discharges, cooling water consumption of thermal power plants), (iii) the ecohydrological model SWIM (natural water balance), (iv) the long term water management model WBalMo (managed discharges, withdrawal of water users, reservoir operation) and (v) the

  8. Guidebook on environmental impact assessment for in situ leach mining projects

    International Nuclear Information System (INIS)

    2005-05-01

    Assessment of the potential environmental impact of an in situ leach (ISL) project is the first step in the permission and licensing process. An Environmental Impact Assessment (EIA) serves as the basis for preparing an Environmental Impact Statement (EIS), which in turn identifies the potential environmental and socioeconomic impact of a proposed project and outlines measures to mitigate the impact. The EIS review process serves to inform the public about a proposed project as well as provide regulatory agencies with assurance that ISL technology will comply with environmental standards, and that project sites can be rehabilitated to pre-mining use. This publication provides a step-by-step description of project parameters that must be addressed in conducting an EIA and preparing an EIS. It also includes EIA/EIS case histories for current operations in Australia, the Czech Republic, Kazakhstan and the United States of America. The publication will be useful to companies considering development of ISL projects and to regulatory personnel who are responsible for writing environmental regulations and licensing ISL projects

  9. Stream-sediment geochemistry in mining-impacted streams: Prichard, Eagle, and Beaver creeks, northern Coeur d'Alene Mining District, northern Idaho

    Science.gov (United States)

    Box, Stephen E.; Wallis, John C.; Briggs, Paul H.; Brown, Zoe Ann

    2005-01-01

    This report presents the results of one aspect of an integrated watershed-characterization study that was undertaken to assess the impacts of historical mining and milling of silver-lead-zinc ores on water and sediment composition and on aquatic biota in streams draining the northern part of the Coeur d?Alene Mining District in northern Idaho. We present the results of chemical analyses of 62 samples of streambed sediment, 19 samples of suspended sediment, 23 samples of streambank soil, and 29 samples of mine- and mill-related artificial- fill material collected from the drainages of Prichard, Eagle, and Beaver Creeks, all tributaries to the North Fork of the Coeur d?Alene River. All samples were sieved into three grain-size fractions (Beaver Creek drainages has resulted in enrichments of lead, zinc, mercury, arsenic, cadmium, silver, copper, cobalt, and, to a lesser extent, iron and manganese in streambed sediment. Using samples collected from the relatively unimpacted West Fork of Eagle Creek as representative of background compositions, streambed sediment in the vicinity of the mines and millsites has Pb and Zn contents of 20 to 100 times background values, decreasing to 2 to 5 times background values at the mouth of the each stream, 15 to 20 km downstream. Lesser enrichments (<10 times background values) of mercury and arsenic also are generally associated with, and decrease downstream from, historical silver-lead-zinc mining in the drainages. However, enrichments of arsenic and, to a lesser extent, mercury also are areally associated with the lode gold deposits along Prichard Creek near Murray, which were not studied here. Metal contents in samples of unfractionated suspended sediment collected during a high-flow event in April 2000 are generally similar to, but slightly higher than, those in the fine (<0.063- mm grain size) fraction of streambed sediment from the same sampling site. Although metal enrichment in streambed sediment typically begins adjacent to

  10. Spatial variations in water composition at a northern Canadian lake impacted by mine drainage

    International Nuclear Information System (INIS)

    Moncur, M.C.; Ptacek, C.J.; Blowes, D.W.; Jambor, J.L.

    2006-01-01

    Release of acid drainage from mine-waste disposal areas is a problem of international scale. Contaminated surface water, derived from mine wastes, originates both as direct surface runoff and, indirectly, as subsurface groundwater flow. At Camp Lake, a small Canadian Shield lake that is in northern Manitoba and is ice-covered 6 months of the year, direct and indirect release of drainage from an adjacent sulfide-rich tailings impoundment has severely affected the quality of the lake water. Concentrations of the products from sulfide oxidation are extremely high in the pore waters of the tailings impoundment. Groundwater and surface water derived from the impoundment discharge into a semi-isolated shallow bay in Camp Lake. The incorporation of this aqueous effluent has altered the composition of the lake water, which in turn has modified the physical limnology of the lake. Geochemical profiles of the water column indicate that, despite its shallow depth (6 m), the bay is stratified throughout the year. The greatest accumulation of dissolved metals and SO 4 is in the lower portion of the water column, with concentrations up to 8500 mg L -1 Fe, 20,000 mg L -1 SO 4 , 30 mg L -1 Zn, 100 mg L -1 Al, and elevated concentrations of Cu, Cd, Pb and Ni. Meromictic conditions and very high solute concentrations are limited to the bay. Outside the bay, solute concentrations are lower and some stratification of the water column exists. Identification of locations and composition of groundwater discharge relative to lake bathymetry is a fundamental aspect of understanding chemical evolution and physical stability of mine-impacted lakes

  11. Xe CONGRES INTERNATIONAL SUR LE COLZA Développement et impacts des OGM

    Directory of Open Access Journals (Sweden)

    Chevre Anne-Marie

    2000-01-01

    Full Text Available Le dernier congrès du Groupe consultatif international de recherches sur le colza s’est déroulé à Canberra (Australie du 26 septembre au 1er octobre 1999. Pour sa dixième édition, cette manifestation, quadriennale, a réuni plus de 600 participants originaires de 28 pays. La délégation australienne mise en part (35 % des participants, le Canada (15 % et l’Allemagne (14 % étaient les pays producteurs les mieux representés suivis de la Grande-Bretagne (6 %, de la France (6 % et de la Chine (5 %. Résumé en chiffre, le contenu scientifique de ces journées a été apporté par 550 présentations de résultats sous forme d’exposés (166 et de posters (384. Parmi les différents thèmes développés, le thème « amélioration des plantes et biotechnologies » a occupé en nombre d’interventions, à peu près la moitié du congrès (44 %. Les notes suivantes reviennent sur les aspects significatifs de ces présentations. Elles seront suivies dans une prochaine livraison des comptes rendus des thèmes « agronomie », « protection des cultures » et « nutrition ». (Les références au sein des articles renvoient aux textes du CDrom du colloque disponible auprès du Dr Rodney Mailer  : mailerr@agric.nsw.gov.au

  12. The impact of Canada's environmental review process on new uranium mine developments

    International Nuclear Information System (INIS)

    Whillans, R.T.

    1997-01-01

    Canada introduced and environmental assessment process in the mid 1970s. It was designed to ensure that the environmental consequences of all project proposals with federal government involvement were assessed for potential adverse effects early in the planning stage. In 1984, a Guidelines Order was approved to clarify the rules, responsibilities and procedures of the environmental Assessment and Review Process (EARP) that had evolved informally under earlier Cabinet directives. In 1989/1990, the Federal Court of Appeal effectively converted the Guidelines Order into a legal requirement for rigorous application. The Supreme Court of Canada upheld the constitutionally of the EARP Guidelines Order in 1992. Canada became the world's leading producer and exporter of uranium during the late 1980s. Since then, the Canadian public has become sensitized to numerous issues concerning environmental degradation, from the Chernobyl accident to ozone depletion. In 1991, during this period of increasing awareness, the Atomic Energy Control Board, the federal nuclear regulator, referred six new Saskatchewan uranium mining projects for environmental review, pursuant to the EARP Guidelines Order. The public review process provided an extremely valuable focus on aspects of these developments that needed to be addressed by proponents and regulators. It has helped to demonstrate that new uranium mining projects are being developed in a responsible manner, after full consideration has been given to the potential impacts and public concerns associated with these facilities. 4 figs, 1 tab

  13. Mines as lower reservoir of an UPSH (Underground Pumping Storage Hydroelectricity): groundwater impacts and feasibility

    Science.gov (United States)

    Bodeux, Sarah; Pujades, Estanislao; Orban, Philippe; Dassargues, Alain

    2016-04-01

    The energy framework is currently characterized by an expanding use of renewable sources. However, their intermittence could not afford a stable production according to the energy demand. Pumped Storage Hydroelectricity (PSH) is an efficient possibility to store and release electricity according to the demand needs. Because of the topographic and environmental constraints of classical PSH, new potential suitable sites are rare in countries whose topography is weak or with a high population density. Nevertheless, an innovative alternative is to construct Underground Pumped Storage Hydroelectricity (UPSH) plants by using old underground mine works as lower reservoir. In that configuration, large amount of pumped or injected water in the underground cavities would impact the groundwater system. A representative UPSH facility is used to numerically determine the interactions with surrounding aquifers Different scenarios with varying parameters (hydrogeological and lower reservoir characteristics, boundaries conditions and pumping/injection time-sequence) are computed. Analysis of the computed piezometric heads around the reservoir allows assessing the magnitude of aquifer response and the required time to achieve a mean pseudo-steady state under cyclic solicitations. The efficiency of the plant is also evaluated taking the leakage into the cavity into account. Combining these two outcomes, some criterions are identified to assess the feasibility of this type of projects within potential old mine sites from a hydrogeological point of view.

  14. The impact of roster changes on absenteeism and incident frequency in an Australian coal mine

    Energy Technology Data Exchange (ETDEWEB)

    Baker, A.; Heiler, K.; Ferguson, S.A. [Queen Elizabeth Hospital, Woodville, SA (Australia). Center for Sleep Research

    2003-01-01

    This paper examines the impact on employee health and safety of changes to the roster system in an Australian coal mine. Absenteeism and incident frequency rate data were collected over a 33 month period that covered three different roster schedules. Period 1 covered the original 8-hour/7-day roster. Period 2 covered a 12-month period under a 12-hour/7-day schedule, and period 3 covered a 12-month period during which a roster that scheduled shifts only on weekdays, with uncapped overtime on weekends and days off (12-hour/5-day) was in place. Data were collected and analysed from the maintenance, mining, and coal preparation plant (CPP) sectors. The study did not find significant negative effects of a 12-hour pattern, when compared to an 8-hour system. However, when unregulated and excessive overtime was introduced as part of the 12-hour/5-day roster, absenteeism rates were increased in the maintenance sector. The combination of excessive work hours and lack of consultation with employees regarding the second change may have contributed to the overall negative effects.

  15. Environmental radiological impact of a Brazilian deactivated Uranium Mine along the period 1999-2009

    International Nuclear Information System (INIS)

    Pereira, W.S.; Kelecom, A.; Silva, A.X.

    2015-01-01

    This study aims to assess the environmental radiological impact (ERI) from the release of wastewaters used by the Mining Industrial Complex at Poços de Caldas (CIPC), today called Ore Treatment Unit (UTM) in Caldas, MG, Brazil, during the period 1999-2009. The effluent waters were analyzed once a week at point 014 (associated with the mine and waste pile 8). Critical radionuclides are 238 U, 226 Ra, 210 Pb, 232 Th and 228 Ra. The 238 U and 232 Th were analyzed by spectrophotometry. The 226 Ra, 210 Pb and 228 Ra, in turn, were analyzed by radiochemical separation methods and subsequent radiometry. The dose estimates were based on the model proposed by the National Nuclear Energy Commission (CNEN) for a hypothetical critical group associated with the point of effluents release into the river Ribeirao das Antas (point 014). The maximum dose rate allowed by CNEN for release is equal to 0.3 mSv·y -1 for individuals of the critical group. Our calculations were performed using the average concentration along the ten years period study. The estimated dose value for the individual of the critical group was 0.12 mSv·y -1 . It may be concluded that the reference levels established by CNEN were not reached. This indicates that the treatment of effluents generated by the CIPC/UTM was conducted efficiently, ensuring the safety of the population living in the surroundings of the Ore Processing Unit (UTM) at Caldas. (author)

  16. Acidophilic algae isolated from mine-impacted environments and their roles in sustaining heterotrophic acidophiles

    Directory of Open Access Journals (Sweden)

    David Barrie Johnson

    2012-09-01

    Full Text Available Two acidophilic algae, identified as strains of Chlorella protothecoides var. acidicola and Euglena mutabilis, were isolated in pure culture from abandoned copper mines in Spain and Wales and grown in pH- and temperature-controlled bioreactors. The Chlorella isolate grew optimally at pH 2.5 and 30 ˚C, with a corresponding culture doubling time of 9 hours. The isolates displayed similar tolerance (10-50 mM to four transition metals tested. Growth of the algae in liquid media was paralleled with increasing concentrations of dissolved organic carbon (DOC. Glycolic acid was identified as a significant component (12- 14% of total DOC. Protracted incubation resulted in concentrations of glycolic acid declining in both cases, and glycolic acid added to a culture of Chlorella incubated in the dark was taken up by the alga (~100% within three days. Two monosaccharides were identified in cell-free liquors of each algal isolate: fructose and glucose (Chlorella, and mannitol and glucose (Euglena. These were rapidly metabolised by acidophilic heterotrophic bacteria (Acidiphilium and Acidobacterium spp. though only fructose was utilised by the more fastidious heterotroph Acidocella aromatica. The significance of algae in promoting the growth of iron- (and sulfate- reducing heterotrophic acidophiles that are important in remediating mine-impacted waters is discussed.

  17. L’impact des facteurs économiques sur l’intention entrepreneuriale

    Directory of Open Access Journals (Sweden)

    Amari Farouk

    2014-03-01

    Nous avons cherché à apporter des éléments de réponse à la question de savoir comment ces facteurs peuvent-ils influencer l’intention de l’entrepreneur de créer son propre projet. Nous avons ciblé le milieu universitaire à travers une enquête auprès d’un échantillon d’étudiants de l’Institut Supérieur d’Administration des Affaires de Sfax (Tunisie.

  18. Environmental Impact of the Helen, Research, and Chicago Mercury Mines on Water, Sediment, and Biota in the Upper Dry Creek Watershed, Lake County, California

    Science.gov (United States)

    Rytuba, James J.; Hothem, Roger L.; May, Jason T.; Kim, Christopher S.; Lawler, David; Goldstein, Daniel; Brussee, Brianne E.

    2009-01-01

    The Helen, Research, and Chicago mercury (Hg) deposits are among the youngest Hg deposits in the Coast Range Hg mineral belt and are located in the southwestern part of the Clear Lake volcanic field in Lake County, California. The mine workings and tailings are located in the headwaters of Dry Creek. The Helen Hg mine is the largest mine in the watershed having produced about 7,600 flasks of Hg. The Chicago and Research Hg mines produced only a small amount of Hg, less than 30 flasks. Waste rock and tailings have eroded from the mines, and mine drainage from the Helen and Research mines contributes Hg-enriched mine wastes to the headwaters of Dry Creek and contaminate the creek further downstream. The mines are located on federal land managed by the U.S. Bureau of Land Management (USBLM). The USBLM requested that the U.S. Geological Survey (USGS) measure and characterize Hg and geochemical constituents in tailings, sediment, water, and biota at the Helen, Research, and Chicago mines and in Dry Creek. This report is made in response to the USBLM request to conduct a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA - Removal Site Investigation (RSI). The RSI applies to removal of Hg-contaminated mine waste from the Helen, Research, and Chicago mines as a means of reducing Hg transport to Dry Creek. This report summarizes data obtained from field sampling of mine tailings, waste rock, sediment, and water at the Helen, Research, and Chicago mines on April 19, 2001, during a storm event. Further sampling of water, sediment, and biota at the Helen mine area and the upper part of Dry Creek was completed on July 15, 2003, during low-flow conditions. Our results permit a preliminary assessment of the mining sources of Hg and associated chemical constituents that could elevate levels of monomethyl Hg (MMeHg) in the water, sediment, and biota that are impacted by historic mining.

  19. Impact of historical mining assessed in soils by kinetic extraction and lead isotopic ratios

    International Nuclear Information System (INIS)

    Camizuli, E.; Monna, F.; Bermond, A.; Manouchehri, N.; Besançon, S.; Losno, R.; Oort, F. van; Labanowski, J.; Perreira, A.; Chateau, C.; Alibert, P.

    2014-01-01

    The aim of this study is to estimate the long-term behaviour of trace metals, in two soils differently impacted by past mining. Topsoils from two 1 km 2 zones in the forested Morvan massif (France) were sampled to assess the spatial distribution of Cd, Cu, Pb and Zn. The first zone had been contaminated by historical mining. As expected, it exhibits higher trace-metal levels and greater spatial heterogeneity than the second non-contaminated zone, supposed to represent the local background. One soil profile from each zone was investigated in detail to estimate metal behaviour, and hence, bioavailability. Kinetic extractions were performed using EDTA on three samples: the A horizon from both soil profiles and the B horizon from the contaminated soil. For all three samples, kinetic extractions can be modelled by two first-order reactions. Similar kinetic behaviour was observed for all metals, but more metal was extracted from the contaminated A horizon than from the B horizon. More surprising is the general predominance of the residual fraction over the “labile” and “less labile” pools. Past anthropogenic inputs may have percolated over time through the soil profiles because of acidic pH conditions. Stable organo-metallic complexes may also have been formed over time, reducing metal availability. These processes are not mutually exclusive. After kinetic extraction, the lead isotopic compositions of the samples exhibited different signatures, related to contamination history and intrinsic soil parameters. However, no variation in lead signature was observed during the extraction experiment, demonstrating that the “labile” and “less labile” lead pools do not differ in terms of origin. Even if trace metals resulting from past mining and metallurgy persist in soils long after these activities have ceased, kinetic extractions suggest that metals, at least for these particular forest soils, do not represent a threat for biota. - Highlights: • Trace

  20. Impact of historical mining assessed in soils by kinetic extraction and lead isotopic ratios

    Energy Technology Data Exchange (ETDEWEB)

    Camizuli, E., E-mail: estelle.camizuli@u-bourgogne.fr [UMR 6298, ArTeHiS, Université de Bourgogne — CNRS — Culture, 6 bd Gabriel, Bat. Gabriel, 21000 Dijon (France); Monna, F. [UMR 6298, ArTeHiS, Université de Bourgogne — CNRS — Culture, 6 bd Gabriel, Bat. Gabriel, 21000 Dijon (France); Bermond, A.; Manouchehri, N.; Besançon, S. [Institut des sciences et industries du vivant et de l' environnement (AgroParisTech), Laboratoire de Chimie Analytique, 16, rue Claude Bernard, 75231 Paris Cedex 05 (France); Losno, R. [UMR 7583, LISA, Universités Paris 7-Paris 12 — CNRS, 61 av. du Gal de Gaulle, 94010 Créteil Cedex (France); Oort, F. van [UR 251, Pessac, Institut National de la Recherche Agronomique, Centre de Versailles-Grignon, RD 10, 78026 Versailles Cedex (France); Labanowski, J. [UMR 7285, IC2MP, Université de Poitiers — CNRS, 4, rue Michel Brunet, 86022 Poitiers (France); Perreira, A. [UMR 6298, ArTeHiS, Université de Bourgogne — CNRS — Culture, 6 bd Gabriel, Bat. Gabriel, 21000 Dijon (France); Chateau, C. [UFR SVTE, Université de Bourgogne, 6 bd Gabriel, Bat. Gabriel, 21000 Dijon (France); Alibert, P. [UMR 6282, Biogeosciences, Université de Bourgogne — CNRS, 6 bd Gabriel, Bat. Gabriel, 21000 Dijon (France)

    2014-02-01

    The aim of this study is to estimate the long-term behaviour of trace metals, in two soils differently impacted by past mining. Topsoils from two 1 km{sup 2} zones in the forested Morvan massif (France) were sampled to assess the spatial distribution of Cd, Cu, Pb and Zn. The first zone had been contaminated by historical mining. As expected, it exhibits higher trace-metal levels and greater spatial heterogeneity than the second non-contaminated zone, supposed to represent the local background. One soil profile from each zone was investigated in detail to estimate metal behaviour, and hence, bioavailability. Kinetic extractions were performed using EDTA on three samples: the A horizon from both soil profiles and the B horizon from the contaminated soil. For all three samples, kinetic extractions can be modelled by two first-order reactions. Similar kinetic behaviour was observed for all metals, but more metal was extracted from the contaminated A horizon than from the B horizon. More surprising is the general predominance of the residual fraction over the “labile” and “less labile” pools. Past anthropogenic inputs may have percolated over time through the soil profiles because of acidic pH conditions. Stable organo-metallic complexes may also have been formed over time, reducing metal availability. These processes are not mutually exclusive. After kinetic extraction, the lead isotopic compositions of the samples exhibited different signatures, related to contamination history and intrinsic soil parameters. However, no variation in lead signature was observed during the extraction experiment, demonstrating that the “labile” and “less labile” lead pools do not differ in terms of origin. Even if trace metals resulting from past mining and metallurgy persist in soils long after these activities have ceased, kinetic extractions suggest that metals, at least for these particular forest soils, do not represent a threat for biota. - Highlights: • Trace

  1. Geomorphic research to determine the offsite impacts of the Jabiluka Mine on Swift (Ngarradj) Creek, Northern Territory. Supervising Scientist report 158

    International Nuclear Information System (INIS)

    Erskine, W.D.; Saynor, M.J.; The University of Western Australia, WA; Evans, K.G.; Boggs, G.S.; Northern Territory University, Darwin, NT

    2001-01-01

    A summary of 13 sub-projects results are outlined in this report. They were are designed to determine the hydrologic, sedimentologic and geomorphic baseline characteristics of catchments in the Jabiluka Mineral Lease, as well as the physical impacts of uranium mining on Swift Creek, and complement and extend the previous research undertaken by ERISS and other agencies at Ranger uranium mine and in the Alligator Rivers Region. Sites impacted by uranium mining were compared with similar natural sites upstream of the influence of mining. A digital evaluation model (DEM) has been generated for the Swift Creek catchment from stereo photogrammetric interpretation of 1:25000 pre-mining aerial photography. It will be used to develop a GIS-based catchment management modelling technology using existing erosion, hydrology and landform models. It is recommended that additional site-specific work will be required to monitor and measure the environmental impacts of the mine and to derive appropriate data for the calibration of landscape evolution models and for mine management. These models are not only required for environmental impact assessment but also for a meaningful assessment of the long-term stability of rehabilitated landforms at the conclusion of mining. The Extreme Events Project recommended by Erskine and Saynor (2000) for the Ranger mine should be undertaken in addition to the above mentioned sub-projects because such information is also required for the design of a stable rehabilitated mine site at Jabiluka. Copyright (2001) Commonwealth of Australia

  2. L’impact des biocarburants sur l’effet de serre

    Directory of Open Access Journals (Sweden)

    Poitrat Etienne

    2002-09-01

    Full Text Available Selon les statistiques de l’Observatoire de l’Énergie [1], la France a consommé 267 Mtep (tonnes équivalent pétrole d’énergie primaire en 2001, ou 269 Mtep avec correction climatique. Cette consommation comprend 145,6 Mtep sous forme d’énergie fossile (tableau 1. Les émissions corrigées du seul CO2 correspondant à l’énergie primaire consommée ont été entre août 2001 et juillet 2002, de 109 Mt de carbone par an [2]. Les énergies renouvelables (EnR totales utilisées en France sont d’environ 28 Mtep/an, dont 16,1 tep sont produits par les grands barrages hydro-électriques. Les autres EnR sont les bioénergies (11,9 Mtep/an et les énergies restantes, sont la géothermie, le solaire, l’éolien et la petite hydraulique [3]. En Europe, la France occupe la 5e place avec 11,5 % d’énergie renouvelable consommée après la Suède (26,7 %, l’Autriche (23,3 %, la Finlande (20,9 % et le Portugal (16,9 % [4]. D’autre part, la réserve mondiale prouvée des énergies fossiles représente au rythme actuel de consommation, qui est de 77 % de l’énergie totale consommée (tableau 2, environ 45 ans pour le pétrole, 60 ans pour le gaz et 220 à 250 ans pour le charbon. Afin de réduire les émissions de carbone fossile issues de la combustion des 77 % des énergies fossiles utilisées, il est nécessaire de réduire les consommations d’énergie par des économies et l’amélioration des rendements, de développer les énergies renouvelables et les technologies de séquestration du carbone. En France, les transports dépendent à plus de 95 % des hydrocarbures, non renouvelables, dont l’utilisation a une part déterminante (24 % dans l’émission des gaz à effet de serre. Le transport routier représente 81 % de la consommation énergétique du secteur. L’effet de serre se manifeste par un réchauffement de la température de l’air (+ 0,5 °C/100 ans et des océans (+ 0,3 °C/30 ans, avec une augmentation de la

  3. Evaluation of environmental impacts of uranium mining and milling operations in Spain

    International Nuclear Information System (INIS)

    Morales, M.; Lopez Romero, A.

    1996-01-01

    Uranium mining and production activities have been carried out by ENUSA since 1973. This report describes the evaluation of environmental aspects connected with uranium mining and milling. (author). 7 figs, 3 tabs

  4. Distributions and concentrations of thallium in surface waters of a region impacted by historical metal mining (Cornwall, UK).

    Science.gov (United States)

    Tatsi, Kristi; Turner, Andrew

    2014-03-01

    Thallium is a highly toxic heavy metal whose concentrations and distributions in the aquatic environment are poorly defined. In this study, concentrations of aqueous and total Tl have been measured in water samples from a variety of rivers and effluents (the latter related to historical metal mining) in the county of Cornwall, SW England. Aqueous concentrations ranged from about 13 ng L(-1) in a river whose catchment contained no metal mines to 2,640 ng L(-1) in water abstracted directly from an abandoned mine shaft. Concentrations of Tl in rivers were greatest in the vicinity of mine-related effluents, with a maximum value measured of about 770 ng L(-1). Thallium was not efficiently removed by the conventional, active treatment of mine water, and displayed little interaction with suspended particles. Its mobility in surface waters, coupled with concentrations that are close to a quality guideline of 800 ng L(-1), is cause for concern. Accordingly, we recommend that the metal is more closely monitored in this and other regions impacted by mining activities. Copyright © 2013 Elsevier B.V. All rights reserved.

  5. Le Phénomène Wolf-Rayet au Sein des Etoiles chaudes de Populations I et II: Histoire des Vents stellaires et Impact sur la Structure nébulaire circumstellaire

    Science.gov (United States)

    Grosdidier, Yves

    2000-12-01

    Les spectres des étoiles Wolf-Rayet pop. I (WR) présentent de larges raies en émission dues à des vents stellaires chauds en expansion rapide (vitesse terminale de l'ordre de 1000 km/s). Le modèle standard des étoiles WR reproduit qualitativement le profil général et l'intensité des raies observées. Mais la spectroscopie intensive à moyenne résolution de ces étoiles révèle l'existence de variations stochastiques dans les raies (sous-pics mobiles en accélération échelles de temps: environ 10-100 min.). Ces variations ne sont pas comprises dans le cadre du modèle standard et suggèrent une fragmentation intrinsèque des vents. Cette thèse de doctorat présente une étude de la variabilité des raies spectrales en émission des étoiles WR pop. II; la question de l'impact d'un vent WR fragmenté sur le milieu circumstellaire est aussi étudiée: 1) à partir du suivi spectroscopique intensif des raies CIIIl5696 et CIVl5801/12, nous analysons quantitativement (via le calcul des Spectres de Variance Temporelle) les vents issus de 5 étoiles centrales de nébuleuses planétaires (NP) galactiques présentant le phénomène WR; 2) nous étudions l'impact de la fragmentation des vents issus de deux étoiles WR pop. I sur le milieu circumstellaire via: i) l'imagerie IR (NICMOS2/HST) de WR 137, et ii) l'imagerie H-alpha (WFPC2/HST) et l'interférométrie Fabry-Perot H-alpha (SIS-CFHT) de la nébuleuse M 1-67 (étoile centrale: WR 124). Les principaux résultats sont les suivants: VENTS WR POP. II: (1) Nous démontrons la variabilité spectroscopique intrinsèque des vents issus des noyaux de NP HD 826 ([WC 8]), BD +30 3639 ([WC 9]) et LSS 3169 ([WC 9]), observés durant respectivement 22, 15 et 1 nuits, et rapportons des indications de variabilité pour les noyaux [WC 9] HD 167362 et He 2-142. Les variabilités de HD 826 et BD +30 3639 apparaissent parfois plus soutenues (``bursts'' qui se maintiennent durant plusieurs nuits); (2) La cinématique des sous

  6. Environmental impact of copper mining and metallurgy during the Bronze Age at Kargaly (Orenburg region, Russia

    Directory of Open Access Journals (Sweden)

    Vicent García, Juan Manuel

    2010-12-01

    Full Text Available Kargaly (Orenburg, Russia is a copper-producing region in which two main phases of mining activity have taken place: the 4th-2nd millennia BC and the 18th-20th centuries AD. This article is a comparative study on the impact of those mining episodes in the distribution of the forest resources in the region, aimed to estimate the scale of prehistoric mining and metallurgical works. For that purpose two paleopalinological sequences obtained from natural deposits located in Kargaly are analysed by inferential Statistics and Multivariate Methods. The results are compared both with a regional sampling of recent pollen rain supported by an analytical model of the present day landscape, and with the anthracological data coming from the Late Bronze Age settlement of Gorny 1. Analysis confirm the large scale of the prehistoric mining impact on the forest cover from the beginnings, as well as the strong effect of husbandry once mining works ended. These results allow us to dismiss a climatic change as main explanation for the detected diachronic variability in the palinological record. They also prove the viability of the proposed approach as a means of integrating the paleoenvironmental disciplines in Landscape Archaeology.

    Kargaly (región de Orenburgo, Rusia es una región cuprífera explotada entre los milenios IV y II cal BC y los siglos XVIII y XX d.C. El objetivo del artículo es estudiar comparativamente el impacto de estos episodios mineros en la distribución de los recursos forestales de la región, para aproximar la escala de las operaciones minero-metalúrgicas prehistóricas. Para ello se analizan con métodos estadísticos inferenciales y multivariantes dos secuencias paleopalinológicas procedentes de depósitos naturales de la región y se comparan con un muestreo regional de la lluvia polínica reciente apoyado por un modelo analítico del paisaje actual y con los datos antracol

  7. Economic, Energetic, and Environmental Impact Evaluation of the Water Discharge Networks from Mining Works

    Directory of Open Access Journals (Sweden)

    Andrei Cristian Rada

    2018-01-01

    Full Text Available Sustainable development represents an optimistic scenario for the evolution of contemporary civilization. The object of this paper is to define certain evaluation criteria regarding the performances of water discharge networks from mining works, and propose a method for aggregating the specific indicators for monetary costs, energetic costs, and environmental impact-related costs. The global pollution index (GPI represents a method for assessing environment health status or pollution levels. The GPI quantitatively expresses this status based on its index, which results from a ratio between the ideal value and the given value of certain quality indices that are considered specific for the analyzed environmental factors at certain moments. The proposed method in this paper tries to perform a synergistic aggregation of the balance sheet of harmfulness and classic balance sheets for matter and energy for an industrial process.

  8. Assessing the Impact of Removing Select Materials from Coal Mine Overburden, Central Appalachia Region, USA

    Science.gov (United States)

    The exposure of readily soluble components of overburden materials from surface coal mining to air and water results in mineral oxidation and carbonate mineral dissolution, thus increasing coal mine water conductivity. A conductivity benchmark of 300 µS/cm for mine water dischar...

  9. The Impact of Small Scale Mining on Irrigation Water Quality in ...

    African Journals Online (AJOL)

    Small scale mining is a major threat to water resources and agricultural activities in most mining communities across Ghana. This study investigated the effect of small scale mining on the quality of water for irrigation from some selected sites along a river and a reservoir which was used as a control. The physical and ...

  10. 75 FR 79016 - Notice of Availability of the Final Environmental Impact Statement for the Newmont Mining...

    Science.gov (United States)

    2010-12-17

    ... Newmont Mining Corporation Emigrant Project Plan of Operation, Nevada AGENCY: Bureau of Land Management... Mining Corporation Emigrant Project Plan of Operations and by this notice is announcing its availability...: Copies of the EIS for the Newmont Mining Corporation Emigrant Project Plan of Operation are available for...

  11. The impacts of neutralized acid mine drainage contaminated water on the expression of selected endocrine-linked genes in juvenile Mozambique tilapia Oreochromis mossambicus exposed in vivo

    CSIR Research Space (South Africa)

    Truter, JC

    2014-02-01

    Full Text Available Acid mine drainage (AMD) is a global environmental concern due to detrimental impacts on river ecosystems. Little is however known regarding the biological impacts of neutralized AMD on aquatic vertebrates despite excessive discharge...

  12. Prises de participation des grandes compagnies aériennes dans de petites compagnies en Europe: impacts sur la géographie des réseaux

    Directory of Open Access Journals (Sweden)

    Frédéric Dobruszkes

    2009-03-01

    Full Text Available La libéralisation du transport aérien européen a accru la tendance des grandes compagnies à prendre des parts dans des compagnies de taille plus modeste tout en diversifiant les motivations. Dans ce contexte, les réseaux aériens des secondes évoluent en fonction des intérêts des premières et sous la contrainte de la rentabilité financière. Les conséquences sur la géographie des réseaux aériens sont variables: tandis que les grandes compagnies concentrent leur offre sur un nombre réduit de hubs, les lignes plus secondaires ou de niche tendent à demeurer l’objet de filiales spécifiques, ou sont laissées à d’autres compagnies (en particulier de type low-cost ou sont supprimées au profit d’une concentration de l’offre ailleurs.

  13. A review of the environmental impact of mining and milling of radioactive ores, upgrading processes, and fabrication of nuclear fuels

    International Nuclear Information System (INIS)

    Costello, J.M.; Davy, D.R.; Cattell, F.C.R.; Cook, J.E.

    1980-01-01

    The subject is discussed under the headings: uranium mining; milling of uranium ores; manufacture of uranium hexafluoride; uranium enrichment; fuel manufacture and fabrication; environmental impact (use of natural resources; effluents from fuel cycle operations; occupational health; public health); alternative fuel cycles; additional waste treatment. (U.K.)

  14. Impact of Text-Mining and Imitating Strategies on Lexical Richness, Lexical Diversity and General Success in Second Language Writing

    Science.gov (United States)

    Çepni, Sevcan Bayraktar; Demirel, Elif Tokdemir

    2016-01-01

    This study aimed to find out the impact of "text mining and imitating" strategies on lexical richness, lexical diversity and general success of students in their compositions in second language writing. The participants were 98 students studying their first year in Karadeniz Technical University in English Language and Literature…

  15. Effects of remediation on the bacterial community of an acid mine drainage impacted stream.

    Science.gov (United States)

    Ghosh, Suchismita; Moitra, Moumita; Woolverton, Christopher J; Leff, Laura G

    2012-11-01

    Acid mine drainage (AMD) represents a global threat to water resources, and as such, remediation of AMD-impacted streams is a common practice. During this study, we examined bacterial community structure and environmental conditions in a low-order AMD-impacted stream before, during, and after remediation. Bacterial community structure was examined via polymerase chain reaction amplification of 16S rRNA genes followed by denaturing gradient gel electrophoresis. Also, bacterial abundance and physicochemical data (including metal concentrations) were collected and relationships to bacterial community structure were determined using BIO-ENV analysis. Remediation of the study stream altered environmental conditions, including pH and concentrations of some metals, and consequently, the bacterial community changed. However, remediation did not necessarily restore the stream to conditions found in the unimpacted reference stream; for example, bacterial abundances and concentrations of some elements, such as sulfur, magnesium, and manganese, were different in the remediated stream than in the reference stream. BIO-ENV analysis revealed that changes in pH and iron concentration, associated with remediation, primarily explained temporal alterations in bacterial community structure. Although the sites sampled in the remediated stream were in relatively close proximity to each other, spatial variation in community composition suggests that differences in local environmental conditions may have large impacts on the microbial assemblage.

  16. Modeling of information on the impact of mining exploitation on bridge objects in BIM

    Science.gov (United States)

    Bętkowski, Piotr

    2018-04-01

    The article discusses the advantages of BIM (Building Information Modeling) technology in the management of bridge infrastructure on mining areas. The article shows the problems with information flow in the case of bridge objects located on mining areas and the advantages of proper information management, e.g. the possibility of automatic monitoring of structures, improvement of safety, optimization of maintenance activities, cost reduction of damage removal and preventive actions, improvement of atmosphere for mining exploitation, improvement of the relationship between the manager of the bridge and the mine. Traditional model of managing bridge objects on mining areas has many disadvantages, which are discussed in this article. These disadvantages include among others: duplication of information about the object, lack of correlation in investments due to lack of information flow between bridge manager and mine, limited assessment possibilities of damage propagation on technical condition and construction resistance to mining influences.

  17. Control of radiological impacts in deactivated uranium mine - the portuguese experience; Controlo dos impactes radiologicos em minas de uranio desactivadas - a experiencia portuguesa

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Alcides; Neves, Luis, E-mail: apereira@dct.uc.p, E-mail: luis.neves@dct.uc.p [Universidade de Coimbra (Portugal). Dept. de Ciencias da Terra. Instituto do Mar

    2011-10-26

    The exploration of radioactive ores occurred in Portugal during around 100 years, and on that period 4370 tons were produced of uranium concentrate, and an estimated total of 13 millions of tons of residues, of various type and variable dangerous grade. From the year 2000 that the government has been performed studies on environmental characterization at the mining areas and remediation project as well. The precise evaluation of the environmental impacts implies the the knowledge of prior work situation, nonexistent for the case of Portuguese mines. This work proposes a methodology for exceeding that limitation focused on selection of area sited at the same metallogenetic province, and considered representative of background. The radiological impacts are checked by the effective dose calculated for reference groups of the exposed population, at this region and in the principal mining area at Portugal (Urgeirica), at the end of exploration and after the finalization of some remediation works

  18. Hydrogeochemical characteristics of streams with and without acid mine drainage impacts: A paired catchment study in karst geology, SW China

    Science.gov (United States)

    Sun, Jing; Tang, Changyuan; Wu, Pan; Strosnider, William H. J.; Han, Zhiwei

    2013-11-01

    A paired catchment study was used to assess karst hydrogeochemistry of two streams.Chemistry of streams with and without acid mine drainage (AMD) was very different.The observation was supported by PHREEQC modeling of equilibrium conditions.Ionic fluxes of AMD-impacted water were higher than that of non-AMD-impacted water.The higher ionic fluxes were predominantly controlled by the oxidation of pyrite.

  19. Impact assessment of mine drainage water and municipal wastewater on the surface water in the vicinity of Bor

    OpenAIRE

    Gardić Vojka R.; Petrović Jelena V.; Đurđevac-Ignjatović Lidija V.; Kolaković Srđan R.; Vujović Svetlana R.

    2015-01-01

    Mining and copper production in Bor, in the past hundred years, had a huge impact on the environment of town, but also in a wide region. In the area of Bor, in the zone of Mining and Smelting Company (RTB) activity, over 29,000 ha of land under forests and fields is degraded. The area of degraded agricultural land in the Bor municipality is over 60% of total agricultural land. Wastewater, generated in the sites of RTB Bor, pollute the Bor River and Krivelj ...

  20. Impact de la dynamique de peuplement sur la distribution des glossines et des trypanosomoses dans la boucle du Mouhoun (Burkina Faso*

    Directory of Open Access Journals (Sweden)

    Rouamba J.

    2009-03-01

    Full Text Available Au Burkina-Faso, la boucle du Mouhoun constitue un foyer historique des trypanosomoses humaines africaines (THA et animales africaines (TAA, transmises par les glossines. Aujourd’hui, la THA semble avoir disparu de cette région après quelques soubresauts dans les années 1970, tandis que la TAA continue de sévir. Afin de mieux comprendre ces évolutions divergentes, nous avons mené une étude géographique basée sur l’analyse de photographies aériennes entre 1952 et 2007, ainsi que d’enquêtes de terrain sur les aspects médicaux, entomologiques et vétérinaires des trypanosomoses. Il apparaît que le paysage de cette région a connu en l’espace d’un siècle des modifications intenses, notamment du fait de l’augmentation des densités de population et des surfaces cultivées, qui n’ont pas été sans conséquences sur le nombre et la distribution des mouches tsé-tsé. Associée à la lutte médicale qui avait permis la stérilisation du réservoir humain de trypanosomes dans les années 1940, cette dégradation paysagère, accompagnée du développement des aménagements hydrauliques et d’évolutions des modalités de migration des hommes et des animaux, semble pouvoir expliquer ces disparités THA/TAA. La mise en évidence de ces facteurs, et leur prise en compte lors d’études ultérieures menées dans d’autres régions, devrait permettre de délimiter des zones d’intervention prioritaires contre les trypanosomoses et leurs vecteurs dans un contexte de lutte internationale contre ces pathologies.

  1. Comparative study on the impact of coal and uranium mining, processing, and transportation in the western United States

    International Nuclear Information System (INIS)

    Sandquist, G.M.

    1979-06-01

    A comparative study and quantitative assessment of the impacts, costs and benefits associated with the mining, processing and transportation of coal and uranium within the western states, specifically Arizona, California, Colorado, Montana, New Mexico, Oregon, Utah, Washington and Wyoming are presented. The western states possess 49% of the US reserve coal base, 67% of the total identified reserves and 82% of the hypothetical reserves. Western coal production has increased at an average annual rate of about 22% since 1970 and should become the major US coal supplier in the 1980's. The Colorado Plateau (in Arizona, Colorado, New Mexico and Utah) and the Wyoming Basin areas account for 72% of the $15/lb U 3 O 8 resources, 76% of the $30/lb, and 75% of the $50/lb resources. It is apparent that the West will serve as the major supplier of domestic US coal and uranium fuels for at least the next several decades. Impacts considered are: environmental impacts, (land, water, air quality); health effects of coal and uranium mining, processing, and transportation; risks from transportation accidents; radiological impact of coal and uranium mining; social and economic impacts; and aesthetic impacts (land, air, noise, water, biota, and man-made objects). Economic benefits are discussed

  2. Comparative study on the impact of coal and uranium mining, processing, and transportation in the western United States

    Energy Technology Data Exchange (ETDEWEB)

    Sandquist, G.M.

    1979-06-01

    A comparative study and quantitative assessment of the impacts, costs and benefits associated with the mining, processing and transportation of coal and uranium within the western states, specifically Arizona, California, Colorado, Montana, New Mexico, Oregon, Utah, Washington and Wyoming are presented. The western states possess 49% of the US reserve coal base, 67% of the total identified reserves and 82% of the hypothetical reserves. Western coal production has increased at an average annual rate of about 22% since 1970 and should become the major US coal supplier in the 1980's. The Colorado Plateau (in Arizona, Colorado, New Mexico and Utah) and the Wyoming Basin areas account for 72% of the $15/lb U/sub 3/O/sub 8/ resources, 76% of the $30/lb, and 75% of the $50/lb resources. It is apparent that the West will serve as the major supplier of domestic US coal and uranium fuels for at least the next several decades. Impacts considered are: environmental impacts, (land, water, air quality); health effects of coal and uranium mining, processing, and transportation; risks from transportation accidents; radiological impact of coal and uranium mining; social and economic impacts; and aesthetic impacts (land, air, noise, water, biota, and man-made objects). Economic benefits are discussed.

  3. Soil contamination in the impact zone of mining enterprises in the Bashkir Transural region

    Science.gov (United States)

    Opekunova, M. G.; Somov, V. V.; Papyan, E. E.

    2017-06-01

    The results of long-term studies of the contents of bulk forms of metals (Cu, Zn, Fe, Ni, Pb, Mn, Co, and Cd) and their mobile compounds in soils of background and human-disturbed areas within the Krasnoural'sk-Sibai-Gai copper-zinc and Baimak-Buribai mixed copper mineralization zones in the Bashkir Transural region are discussed. It is shown that soils of the region are characterized by abnormally high natural total contents of heavy metals (HMs) typomorphic for ore mineralization: Cu, Zn, and Fe for the Sibai province and Cu, Zn, and Ni for the Baimak province. In the case of a shallow depth of the ores, the concentrations of HMs in the soils are close to or higher than the tentative permissible concentration values. The concentrations of mobile HM compounds in soils of background areas and their percentage in the total HM content strongly vary from year to year in dependence on weather conditions, position in the soil catenas, species composition of vegetation, and distance from the source of technogenic contamination. The high natural variability in the content of mobile HM compounds in soils complicates the reliable determination of the regional geochemical background and necessitates annual estimation of background parameters for the purposes of the ecological monitoring of soils. The bulk content of Cu and Zn content in soils near mining enterprises exceeds the regional geochemical background values by 2-12 times and the tentative permissible concentrations of these metals by 2-4 times. Anthropogenic contamination results in a sharp rise in the content of mobile HM compounds in soils. Their highest concentrations exceed the maximum permissible concentrations by 26 times for Cu, 18 times for Zn, and 2 times for Pb. Soil contamination in the impact zone of mining enterprises is extremely dangerous or dangerous. However, because of the high temporal variability in the migration and accumulation of HMs in the soils, the recent decline in the ore mining

  4. On the impact of the "Holbinsky" mine on the components of the natural environment of the Eastern Sayan

    Directory of Open Access Journals (Sweden)

    O. A. Ivanova

    2017-09-01

    Full Text Available Traditional approaches to the problem of rational use of natural resources have undergone radical changes in recent years, as, due to increasing pollution and resource depletion, a thorough reassessment of existing concepts and priorities became necessary. To this end, the authors conducted the research on the impact of the mining industry (the "Kholbinsky" mine on the ecosystems of the Eastern Sayan. The "Kholbinsky" mine is located at an altitude of 1965-2270m above sea level, in the basins of the small rivers Samarta, Zun-Holba and Barun-Holba, which are tributaries of the rivers Kitoya and Urik. The mine has three industrial sites: the Samarta industrial site with a shift camp, the Zun-Holba industrial site, also with a shift camp, and mining operation sites. The main site for processing ore and extracting gold is the Samarta industrial site, which includes a gold recovery factory (GRF, a hydrometallurgy workshop, a garage with an open parking lot, a concrete mixing plant, a carpentry workshop, ore and coal warehouses, a slag dump from a boiler house, a diesel power plant, an auxiliary production - smithy, welding sectors, a tailing pit for flotation tailings and a tailing pit for sorption tailings. An auxiliary production and heating boiler-houses are located on the Zun-Holba industrial site. The mining mass (ores and rocks delivery to the surface and the rock storing to dumps takes place on mining operation sites. The authors reveal long-term impact of harmful substances emissions into the atmosphere, and provide the main factors contributing to the accumulation of harmful impurities in the ground air layer. One of indicators of the state of the aquatic environment is the state of fish and chiromids larvae in water bodies, so the authors evaluated the fish production parameters for the watercourses of the Samarta River. The study also showed that the field surface in the process of geological prospecting and mining operations became

  5. Diversity and Impacts of Mining on the Non-Volant Small Mammal Communities of Two Vegetation Types in the Brazilian Amazon.

    Science.gov (United States)

    Ardente, Natália Carneiro; Ferreguetti, Átilla Colombo; Gettinger, Donald; Leal, Pricila; Mendes-Oliveira, Ana Cristina; Martins-Hatano, Fernanda; Bergallo, Helena Godoy

    2016-01-01

    The Carajás National Forest contains some of the largest iron ore deposits in the world. The majority of the minerals are found below a plant community known as Savana Metalófila, or "Canga", which represents only 3% of the landscape within the Carajás National Forest (CNF). The aim of our study was to understand the diversity of community of non-volant small mammals in the two predominant vegetation types: Ombrophilous Forest and Canga, and to examine how mining impacts these communities. Sampling was conducted from January 2010 to August 2011 in 11 sampling sites divided by the total area of Canga and 12 sampling sites in the forest, totalizing 23 sites. Of these, 12 sites (Canga and Forest) were considered impacted areas located close to the mine (mine. We recorded 28 species, 11 from the Order Didelphimorphia and 17 from the Order Rodentia. The two forest types shared 68.42% of the species found in the CNF. A gradient analysis (Non-metric multidimensional scaling) revealed that the first axis clearly separated the non-flying small mammal communities by vegetation type. Occupancy models showed that the detectability of species was affected by the distance from the mining activities. Of all the small mammals analyzed, 10 species were positively affected by the distance from mining in areas impacted (e.g. more likely to be detected farther from mining areas) and detectability was lower in impacted areas. However, three species were negatively affected by the distance from mining, with higher detectability in the impacted areas, and seven species showed no effect of their proximity to mining operations. To date, there are no studies in Brazil about the impact of mining on mammals or other vertebrates. This study reveals that the effect of mining may go beyond the forest destruction caused by the opening of the mining pits, but also may negatively affect sensitive wildlife species.

  6. The Impact of the Quality of Coal Mine Stockpile Soils on Sustainable Vegetation Growth and Productivity

    Directory of Open Access Journals (Sweden)

    Nicky M Mushia

    2016-06-01

    Full Text Available Stockpiled soils are excavated from the ground during mining activities, and piled on the surface of the soil for rehabilitation purposes. These soils are often characterized by low organic matter (SOM content, low fertility, and poor physical, chemical, and biological properties, limiting their capability for sustainable vegetation growth. The aim of the study was to evaluate the impact of stockpile soils of differing depth and quality on vegetation growth and productivity. Soils were collected at three different depths (surface, mid, and deep as well as mixed (equal proportion of surface, mid and deep from two stockpiles (named Stockpile 1: aged 10 and Stockpile 2: 20 years at the coal mine near Witbank in the Mpumalanga province of South Africa. Soils were amended with different organic and inorganic fertilizer. A 2 × 4 × 5 factorial experiment in a completely randomized blocked design with four replications was established under greenhouse conditions. A grass species (Digiteria eriantha was planted in the pots with unamended and amended soils under greenhouse conditions at 26–28 °C during the day and 16.5–18.5 °C at night. Mean values of plant height, plant cover, total fresh biomass (roots, stems and leaves, and total dry biomass were found to be higher in Stockpile 1 than in Stockpile 2 soils. Plants grown on soils with no amendments had lower mean values for major plant parameters studied. Soil amended with poultry manure and lime was found to have higher growth rate compared with soils with other soil amendments. Mixed soils had better vegetation growth than soil from other depths. Stockpiled soils in the study area cannot support vegetation growth without being amended, as evidenced by low grass growth and productivity in this study.

  7. Environmental radiological impact of a Brazilian deactivated Uranium Mine along the period 1999-2009

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, W.S., E-mail: wspereira@inb.gov.br [Industrias Nucleares do Brasil (FCN/GMR/INB), Resende, RJ (Brazil). Fabrica de Combustivel Nuclear. Grupo Multidisciplinar de Radioprotecao; Kelecom, A., E-mail: lararapls@hotmail.com [Universidade Federal Fluminense (LARARA-PLS/UFF), Niteroi, RJ (Brazil). Laboratorio de Radiobiologia e Radiometria Pedro Lopes dos Santos; Silva, A.X., E-mail: ademir@con.ufrj.br [Corrdenacao dos Programas de Pos-Graduacao em Engenharia (COPPE), Rio de Janeiro, RJ (Brazil). Programa de Engenharia Nuclear. Departamento de Engenharia Nuclear

    2015-07-01

    This study aims to assess the environmental radiological impact (ERI) from the release of wastewaters used by the Mining Industrial Complex at Poços de Caldas (CIPC), today called Ore Treatment Unit (UTM) in Caldas, MG, Brazil, during the period 1999-2009. The effluent waters were analyzed once a week at point 014 (associated with the mine and waste pile 8). Critical radionuclides are {sup 238}U, {sup 226}Ra, {sup 210}Pb, {sup 232}Th and {sup 228}Ra. The {sup 238}U and {sup 232}Th were analyzed by spectrophotometry. The {sup 226}Ra, {sup 210}Pb and {sup 228}Ra, in turn, were analyzed by radiochemical separation methods and subsequent radiometry. The dose estimates were based on the model proposed by the National Nuclear Energy Commission (CNEN) for a hypothetical critical group associated with the point of effluents release into the river Ribeirao das Antas (point 014). The maximum dose rate allowed by CNEN for release is equal to 0.3 mSv·y{sup -1}for individuals of the critical group. Our calculations were performed using the average concentration along the ten years period study. The estimated dose value for the individual of the critical group was 0.12 mSv·y{sup -1}. It may be concluded that the reference levels established by CNEN were not reached. This indicates that the treatment of effluents generated by the CIPC/UTM was conducted efficiently, ensuring the safety of the population living in the surroundings of the Ore Processing Unit (UTM) at Caldas. (author)

  8. Environmental impact of peat mining. Development of storm water treatment methods

    International Nuclear Information System (INIS)

    Kloeve, Bjoern

    1997-11-01

    The aim of this series of studies has been to develop methods to reduce the environmental impacts of peat mining, that function when the pollution load is high and that are economically viable for all peat mines. Sediment transport and nutrient leaving were studied with the purpose of establishing more efficient treatment alternatives. A controlled experiment was set up to measure the erosion of peat from the soil surface and from ditch beds during heavy rainfall and runoff events and to measure the settling characteristics of base soil peat and peat deposited in channels. The study demonstrates the importance of channel bed erosion as the main source of sediment during peak runoff. Sediment transport and nutrient leaching were further observed in the field during 1995 and 1996. The study showed that suspended solids (SS) is mainly generated during extreme events, such as flooding. These high flow events erode the material deposited on the channel bed during low flows. The leaching of nitrogen occurs after large rain events, while high phosphorous concentrations occur when the water table is low. Treatment alternatives were developed to improve removal of SS and nutrients. Different types of ponds were tested in a laboratory study. The study showed that the main factor affecting the settling of small peat particles is the depth of the settling basin. A mathematical model showed that in the case of bare soil erosion, the best treatment alternative would be to store the water in the large drainage network rather than in the sedimentation basin. Different structures suitable for peak runoff control were tested under laboratory and field conditions 54 refs, 11 figs

  9. Impacts économiques et sociaux des changements climatiques sur l ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Le projet étudiera l'attribution de l'eau dans les divers secteurs productifs des trois bassins et estimera la demande d'eau pour l'agriculture, l'industrie et la consommation domestique. La recherche identifiera les groupes vulnérables touchés par le stress hydrique engendré par les changements climatiques. On fera appel à ...

  10. Coal mining situation in the Federal Republic of Germany. 1st half of 2016; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. 1. Halbjahr 2016

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-09-01

    The report on coal mining in Germany contains statistical data on the following issues: (a) Hard coal mining: part 1: production, resources, performance, employees; part 2: marketing and foreign commerce. (b) brown coal: part 1: production, resources, performance, employees; part II: marketing in domestic and foreign commerce.

  11. Coal mining situation in the Federal Republic of Germany. 1st half of 2017; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. 1. Halbjahr 2017

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2017-09-01

    The report on coal mining in Germany contains statistical data on the following issues: (a) Hard coal mining: part 1: production, resources, performance, employees; part 2: sales and foreign trade. (b) brown coal: part 1: production, refinement, employees; part II: sales in domestic and foreign trade.

  12. Coal mining situation in the Federal Republic of Germany. 1st half of 2015; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. 1. Halbjahr 2015

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-08-28

    The report on coal mining in Germany contains statistical data on the following issues: (a) Hard coal mining: part 1: production, resources, performance, employees; part 2: marketing and foreign commerce. (b) brown coal: part 1: production, resources, performance, employees; part II: marketing in domestic and foreign commerce.

  13. Coal mining situation in the Federal Republic of Germany. January to September 2017; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Januar bis September 2017

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2017-12-04

    This publication presents statistical data on hard coal mining (production, stocks, performance per miner and shift, headcount, sales, foreign sales, imports) as well as brown coal mining (production, refining, headcount, domestic sales, imports) in Germany during the period from January through September 2017.

  14. Coal mining situation in the Federal Republic of Germany. January to September 2016; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Januar bis September 2016

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2016-11-16

    This publication presents statistical data on hard coal mining (production, stocks, performance per miner and shift, headcount, sales, foreign sales, imports) as well as brown coal mining (production, refining, headcount, domestic sales, imports) in Germany during the period from January through September 2016.

  15. Coal mining situation in the Federal Republic of Germany. January to September 2015; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Januar bis September 2015

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-11-30

    This publication presents statistical data on hard coal mining (production, stocks, performance per miner and shift, headcount, sales, foreign sales, imports) as well as brown coal mining (production, refining, headcount, domestic sales, imports) in Germany during the period from January through September 2015.

  16. Coal mining situation in the Federal Republic of Germany. January to September 2014; Zur Lage des Kohlenbergbaus in der Bundesrepublik Deutschland. Januar bis September 2014

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2014-12-12

    This publication presents statistical data on hard coal mining (production, stocks, performance per miner and shift, headcount, sales, foreign sales, imports) as well as brown coal mining (production, refining, headcount, domestic sales, imports) in Germany during the period from January through September 2014.

  17. The occurrence and potential ecological risk assessment of bauxite mine-impacted water and sediments in Kuantan, Pahang,Malaysia.

    Science.gov (United States)

    Kusin, Faradiella Mohd; Rahman, Muhammad Syazwan Abd; Madzin, Zafira; Jusop, Shamshuddin; Mohamat-Yusuff, Ferdaus; Ariffin, Mariani; Z, Mohd Syakirin Md

    2017-01-01

    Recent bauxite mining activities in the vicinity of Kuantan, Pahang, have been associated with apparent environmental quality degradation and have raised environmental concerns among the public. This study was carried out to evaluate the overall ecological impacts on water and sediment quality from the bauxite mining activities. Water and sediment samples were collected at seven sampling locations within the bauxite mining areas between June and December 2015. The water samples were analyzed for water quality index (WQI) and distribution of major and trace element geochemistry. Sediment samples were evaluated based on geochemical indices, i.e., the enrichment factor (EF) and geoaccumulation index (I geo ). Potential ecological risk index was estimated to assess the degree to which sediments of the mine-impacted areas have been contaminated with heavy metals. The results showed that WQIs of some locations were classified as slightly polluted and contained metal contents exceeding the recommended guideline values. The EFs indicated minimal to moderate enrichment of metals (Pb, Cu, Zn, Mn, As, Cd, Cr, Ni, Co, and Sr) in the sediments. I geo showed slightly to partially polluted sediments with respect to As at some locations. The potential ecological risk index (RI) showed that As posed the highest potential ecological risk with RI of 52.35-60.92 at two locations, while other locations indicated low risk. The findings from this study have demonstrated the impact of recent bauxite mining activities, which might be of importance to the local communities and relevant authorities to initiate immediate rehabilitation phase of the impacted area.

  18. Early signals of environmental and health impacts caused by uranium mining in Caetite, Bahia, Brazil

    International Nuclear Information System (INIS)

    Brito, Adelson S. de; Rego, Rita de Cassia Franco; Zucchi, Maria do Rosario; Navarro, Marcus V. Teixeira

    2011-01-01

    Uranium mining and processing at Lagoa Real (Bahia, Brazil) in the southwest of Bahia state started in the year 2000.The processing of uranium ore for obtaining U3O8 (yellowcake) is done today in the processing unit of the Brazilian Nuclear Industries INB located in the area of the same municipality above mentioned. The production capacity is 400 tons / year of U3O8, and the reserves in this region are estimated at 100.000 tons of uranium without any other associated minerals, enough to supply the demand for nuclear power plants Angra I and II for over 100 years. Since the granting of AOP (Permanent Operation Authorization) by CNEN (National Commission on Nuclear Energy) in the year 2009, there were some incidents at the facility, such as: solvents and liquid containing uranium overflow; pipes rupture, causing indiscriminate dispersion of toxic acids and other chemical agents; collapse of parts of the slope of the open pit. CNEN admitted in an official press release on April 1, 2011 that 'INB has no capacity to produce annual reports on environmental monitoring (unable to perform radiometric measurements, etc.). The last time a report was released happened in the year 2008. These reports are vital to the environmental impact assessment of the facility'. Another potential source of environmental and health negative impacts on the local population could be linked to radon emission. What are the levels of this important pollutant in the affected areas? (author)

  19. Computational fluid dynamics (CFD) investigation of impacts of an obstruction on airflow in underground mines.

    Science.gov (United States)

    Zhou, L; Goodman, G; Martikainen, A

    2013-01-01

    Continuous airflow monitoring can improve the safety of the underground work force by ensuring the uninterrupted and controlled distribution of mine ventilation to all working areas. Air velocity measurements vary significantly and can change rapidly depending on the exact measurement location and, in particular, due to the presence of obstructions in the air stream. Air velocity must be measured at locations away from obstructions to avoid the vortices and eddies that can produce inaccurate readings. Further, an uninterrupted measurement path cannot always be guaranteed when using continuous airflow monitors due to the presence of nearby equipment, personnel, roof falls and rib rolls. Effective use of these devices requires selection of a minimum distance from an obstacle, such that an air velocity measurement can be made but not affected by the presence of that obstacle. This paper investigates the impacts of an obstruction on the behavior of downstream airflow using a numerical CFD model calibrated with experimental test results from underground testing. Factors including entry size, obstruction size and the inlet or incident velocity are examined for their effects on the distributions of airflow around an obstruction. A relationship is developed between the minimum measurement distance and the hydraulic diameters of the entry and the obstruction. A final analysis considers the impacts of continuous monitor location on the accuracy of velocity measurements and on the application of minimum measurement distance guidelines.

  20. Early signals of environmental and health impacts caused by uranium mining in Caetite, Bahia, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Brito, Adelson S. de; Rego, Rita de Cassia Franco [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Medicina Preventiva. Programa de Pos-Graduacao em Saude, Ambiente e Trabalho; Zucchi, Maria do Rosario [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Fisica da Terra. Lab. de Fisica Nuclear Aplicada; Navarro, Marcus V. Teixeira, E-mail: mvtn@ifba.edu.b [Instituto Federal da Bahia (LAFIR/NTS/IFBA) Salvador, BA (Brazil). Nucleo de Tecnologia em Saude. Lab. de Fisica Radiologica

    2011-07-01

    Uranium mining and processing at Lagoa Real (Bahia, Brazil) in the southwest of Bahia state started in the year 2000.The processing of uranium ore for obtaining U3O8 (yellowcake) is done today in the processing unit of the Brazilian Nuclear Industries INB located in the area of the same municipality above mentioned. The production capacity is 400 tons / year of U3O8, and the reserves in this region are estimated at 100.000 tons of uranium without any other associated minerals, enough to supply the demand for nuclear power plants Angra I and II for over 100 years. Since the granting of AOP (Permanent Operation Authorization) by CNEN (National Commission on Nuclear Energy) in the year 2009, there were some incidents at the facility, such as: solvents and liquid containing uranium overflow; pipes rupture, causing indiscriminate dispersion of toxic acids and other chemical agents; collapse of parts of the slope of the open pit. CNEN admitted in an official press release on April 1, 2011 that 'INB has no capacity to produce annual reports on environmental monitoring (unable to perform radiometric measurements, etc.). The last time a report was released happened in the year 2008. These reports are vital to the environmental impact assessment of the facility'. Another potential source of environmental and health negative impacts on the local population could be linked to radon emission. What are the levels of this important pollutant in the affected areas? (author)

  1. The impact of human factor on labor productivity at the mining enterprises

    Directory of Open Access Journals (Sweden)

    Pinigina Galina

    2017-01-01

    Full Text Available The article describes the term “human factor” which implies a person involved in the organizational process in the diversity of his natural and socio-psychological characteristics. The necessity to identify the impact of human factor on labour productivity at the mining enterprises is proved. It is assumed that considering human factor can be one of the ways to increase labour productivity. A research technique of the complex – mechanized team in order to identify the impact of human factor on its productivity is described. Definite research results and analysis which strongly support the assumption are given. The stages at which the human factor should be considered are analyzed. Based on the fact that person's mood determines all his vital functions, the following interpretation of the human factor was propose: to consider the human factor means to take into account everything that might spoil the mood of a person starting from his coming to the place of work till the work is finished. If it is necessary to provide high productivity, take care of the human mind. This thesis does not require proof and justification, it is obvious.

  2. Identification of Significant Impact of Silicon Foundry Sands Mining on LCIA

    Directory of Open Access Journals (Sweden)

    Jozef Mitterpach

    2015-12-01

    Full Text Available This paper presents a case study based on a LCA (Life Cycle Assessment research program of the silicon foundry sand (SFS due to the large quantity of produced waste foundry sand (WFS. The foundry waste is a high priority sector within the growing European foundry industry. It is necessary to understand the full life cycle of the foundry waste in order to correctly identify magnitude and types of impacts it has on the environment. System boundary includes the processes: mining, modification, packing, storage and transport to foundry. Inventory analysis data were analyzed and finally converted to the functional unit, which has been defined as one ton of SFS. The resulting environmental impact of SFS production in endpoint is: consumption of natural resources 70.9%, ecosystem quality 18.2% and human health 10.9%. The following portions, with respective percentages, have the greatest overall effect on these results: diesel fuel consumption 32.4% and natural gas consumption 28.7%, electricity usage 17.2%, transport 12.2%, devastation caused by the SFS 5.35% and oil (engine, gear and hydraulic consumption 4.14%. The highest contributor to the diesel fuel consumption is the SFS exploitation. The overall effect of desiccation was 35.8% and was caused by high consumption of resources and electricity.

  3. Environmental impact assessment of sand mining from the small catchment rivers in the southwestern coast of India: a case study.

    Science.gov (United States)

    Sreebha, Sreedharan; Padmalal, Damodaran

    2011-01-01

    In the past few decades, the demand for construction grade sand is increasing in many parts of the world due to rapid economic development and subsequent growth of building activities. This, in many of the occasions, has resulted in indiscriminate mining of sand from in-stream and floodplain areas leading to severe damages to the river basin environment. The case is rather alarming in the small catchment rivers like those draining the southwestern coast of India due to limited sand resources in their alluvial reaches. Moreover, lack of adequate information on the environmental impact of river sand mining is a major lacuna challenging regulatory efforts in many developing countries. Therefore, a scientific assessment is a pre-requisite in formulating management strategies in the sand mining-hit areas. In this context, a study has been made as a case to address the environmental impact of sand mining from the in-stream and floodplain areas of three important rivers in the southwestern coast of India namely the Chalakudy, Periyar and Muvattupuzha rivers, whose lowlands host one of the fast developing urban-cum-industrial centre, the Kochi city. The study reveals that an amount of 11.527 million ty(-1) of sand (8.764 million ty(-1) of in-stream sand and 2.763 million ty(-1) of floodplain sand) is being mined from the midland and lowland reaches of these rivers for construction of buildings and other infrastructural facilities in Kochi city and its satellite townships. Environmental Impact Assessment (EIA) carried out as a part of this investigation shows that the activities associated with mining and processing of sands have not only affected the health of the river ecosystems but also degraded its overbank areas to a large extent. Considering the degree of degradation caused by sand mining from these rivers, no mining scenario may be opted in the deeper zones of the river channels. Also, a set of suggestions are made for the overall improvement of the rivers and its

  4. Test Methodology for Protection of Vehicle Occupants against Anti-Vehicular Landmine Effects (Methodologie d’essais pour la protection des occupants de vehicules contre les effets des mines terrestres anti-vehicules)

    Science.gov (United States)

    2007-04-01

    xvii Acknowledgements xviii Executive Summary and Synthèse ES-1 Chapter 1 – Introduction 1-1 1.1 Background and Problem Definition 1-1 1.1.1...for Protection of Vehicle Occupants against Anti-Vehicular Landmine Effects (RTO-TR-HFM-090) Executive Summary In the last decade, national and...occupants. Suite à la détonation, apparaissent des effets de choc , de déformation structurelle et de mouvement global qui peuvent causer des

  5. The impact of gypsum mine water: A case study on morphology and DNA integrity in the freshwater invertebrate, Gammarus balcanicus

    International Nuclear Information System (INIS)

    Ternjej, Ivančica; Mihaljević, Zlatko; Ivković, Marija; Previšić, Ana; Stanković, Igor; Maldini, Krešimir; Želježić, Davor; Kopjar, Nevenka

    2014-01-01

    The aim of our study was to investigate how exposure to heavy metal-rich waters from gypsum mining affects the morphology and levels of primary DNA damage in Gammarus balcanicus. Chemical analysis revealed increased concentrations of metals in water and sediment collected at a site impacted by gypsum mine wastewaters. The specimens also showed elevated total tissue metal levels when compared with the organisms collected at the reference site. The most prominent increase was observed for strontium, followed by iron, nickel, vanadium, aluminium, and manganese. The major pathway of entry for these toxic substances was through the degraded exoskeleton as a consequence of excessive strontium input (unbalanced calcium/strontium ratio) and altered permeability. Disturbed exoskeleton integrity was observed only in individuals collected downstream of the gypsum mine, which was confirmed by electron microscopy. Levels of primary DNA damage were evaluated using the alkaline comet assay in the haemolymph of the specimens. - Highlights: • Our findings suggest toxic potential of gypsum mine wastewaters. • The Gammarus specimens showed elevated total tissue metal levels. • Strontium uptake disturbed exoskeleton integrity. • Corrupted cuticle altered permeability to other toxic substances. • Combined effects of all contaminants caused genotoxicity. - Gypsum mine wastewaters have genotoxic potential and affect the gammarid exoskeleton morphology and biochemistry associated with a high strontium uptake

  6. Weaving Ecosystem Service Assessment into Environmental Impact Assessments of Thar Coal Field: Impact of Coal Mining on Socio-Ecological Systems of Rural Communities.

    Science.gov (United States)

    Hina, A.

    2016-12-01

    The Research takes into account Block II Mining and Power Plant Project of Thar Coal field in Pakistan by carrying out ecosystem service assessment of the region to identify the impact on important ecosystem service losses and the contribution of mining companies to mitigate the socio-economic problems as a part of their Corporate Social Responsibility (CSR). The study area includes 7 rural settlements, around 921 households and 7000 individuals, dependent on agriculture and livestock for their livelihoods. Currently, the project has adopted the methods of strip mining (also called open-cut mining, open-cast mining, and stripping), undergoing removing the overburden in strips to enable excavation of the coal seams. Since the consequences of mine development can easily spill across community and ecological boundaries, the rising scarcity of some ecosystem services makes the case to examine both project impact and dependence on ecosystem services. A preliminary Ecosystem Service review of Thar Coal Field identifies key ecosystems services owing to both high significance of project impact and high project dependence are highlighted as: the hydrogeological study results indicate the presence of at least three aquifer zones: one above the coal zone (the top aquifer), one within the coal and the third below the coal zone. Hence, Water is identified as a key ecosystem service to be addressed and valued due to its high dependency in the area for livestock, human wellbeing, agriculture and other purposes. Crop production related to agricultural services, in association with supply services such as soil quality, fertility, and nutrient recycling and water retention need to be valued. Cultural services affected in terms of land use change and resettlement and rehabilitation factors are recommended to be addressed.

  7. Physiological strain in the Hungarian mining industry: The impact of physical and psychological factors

    OpenAIRE

    József Varga; Imre Nagy; László Szirtes; János Pórszász

    2016-01-01

    Objectives: The objectives of these investigations completed on workplaces in the Hungarian mining industry were to characterize the physiological strain of workers by means of work pulse and to examine the effects of work-related psychological factors. Material and Methods: Continuous heart rate (HR) recording was completed on 71 miners over a total of 794 shifts between 1987 and 1992 in mining plants of the Hungarian mining industry using a 6-channel recorder – Bioport (ZAK, Germany). The w...

  8. Aborigines and uranium: consolidated report to the Minister for Aboriginal Affairs on the social impact of uranium mining on the aborigines of the Northern Territory

    International Nuclear Information System (INIS)

    1984-01-01

    This consolidated report for the period October 1978 to June 1984 examines the aboriginal social environment, the impact and consequences for aborigines of uranium mining. The report looks at the question of monitoring social impact and examines in detail the findings and recommendations of the Ranger Uranium Environmental Inquiry. The social impact of mining is discussed, including the complexity of law and administration, economic consequences, health and aboriginal civic culture

  9. Impact assessment of mine drainage water and municipal wastewater on the surface water in the vicinity of Bor

    Directory of Open Access Journals (Sweden)

    Gardić Vojka R.

    2015-01-01

    Full Text Available Mining and copper production in Bor, in the past hundred years, had a huge impact on the environment of town, but also in a wide region. In the area of Bor, in the zone of Mining and Smelting Company (RTB activity, over 29,000 ha of land under forests and fields is degraded. The area of degraded agricultural land in the Bor municipality is over 60% of total agricultural land. Wastewater, generated in the sites of RTB Bor, pollute the Bor River and Krivelj River, which still flow into the Timok River and Danube River. These pollutions are often presented by low pH value, increased content of heavy metal ions, suspended particles and fine particles of flotation tailings, which is deposited in the valleys of these rivers on the area of over 2000 hectares. During the decades of exploitation of ore from the open pit Bor at different locations ("Visoki Planir" - also called “Oštreljski planir”, "Severni planir" dump of ore body "H" (RTH gangue and tailings were delayed. The largest amount of tailings, about 150 million tons, was postponed on location Visoki planir. The effect of the mining waste and the impact of the whole process of processing copper ore to the final products on the environment, was conducted during the 4th study period of the project "Management of mining waste-tailing dump in the Bor region," supported by the Japan Society for the Promotion Science (Eng. Japan Society for the Promotion of Science and the Japan international cooperation Agency and the Ministry of environment, Mining and Spatial planning of the Republic of Serbia. Influence of season on the level of pollutants in soil and water, the impact on water quality in the river Timok and the River Danube, was conducted during first three periods of project. This paper presents the results of the third study period. The third period of research, which was conducted over a period of 17. 10. 2012 to 17. 01.2013 year, included a review of pollution sources and define their

  10. Environmental impact of coal mining and coal seam gas production on surface water quality in the Sydney basin, Australia.

    Science.gov (United States)

    Ali, A; Strezov, V; Davies, P; Wright, I

    2017-08-01

    The extraction of coal and coal seam gas (CSG) will generate produced water that, if not adequately treated, will pollute surface and groundwater systems. In Australia, the discharge of produced water from coal mining and related activities is regulated by the state environment agency through a pollution licence. This licence sets the discharge limits for a range of analytes to protect the environment into which the produced water is discharged. This study reports on the impact of produced water from coal mine activities located within or discharging into high conservation environments, such as National Parks, in the outer region of Sydney, Australia. The water samples upstream and downstream from the discharge points from six mines were taken, and 110 parameters were tested. The results were assessed against a water quality index (WQI) which accounts for pH, turbidity, dissolved oxygen, biochemical oxygen demand, total dissolved solids, total phosphorus, nitrate nitrogen and E .coli. The water quality assessment based on the trace metal contents against various national maximum admissible concentration (MAC) and their corresponding environmental impacts was also included in the study which also established a base value of water quality for further study. The study revealed that impacted water downstream of the mine discharge points contained higher metal content than the upstream reference locations. In many cases, the downstream water was above the Australia and New Zealand Environment Conservation Council and international water quality guidelines for freshwater stream. The major outliers to the guidelines were aluminium (Al), iron (Fe), manganese (Mn), nickel (Ni) and zinc (Zn). The WQI of surface water at and downstream of the discharge point was lower when compared to upstream or reference conditions in the majority of cases. Toxicology indices of metals present in industrial discharges were used as an additional tool to assess water quality, and the newly

  11. Uranium mining

    International Nuclear Information System (INIS)

    2008-01-01

    Full text: The economic and environmental sustainability of uranium mining has been analysed by Monash University researcher Dr Gavin Mudd in a paper that challenges the perception that uranium mining is an 'infinite quality source' that provides solutions to the world's demand for energy. Dr Mudd says information on the uranium industry touted by politicians and mining companies is not necessarily inaccurate, but it does not tell the whole story, being often just an average snapshot of the costs of uranium mining today without reflecting the escalating costs associated with the process in years to come. 'From a sustainability perspective, it is critical to evaluate accurately the true lifecycle costs of all forms of electricity production, especially with respect to greenhouse emissions, ' he says. 'For nuclear power, a significant proportion of greenhouse emissions are derived from the fuel supply, including uranium mining, milling, enrichment and fuel manufacture.' Dr Mudd found that financial and environmental costs escalate dramatically as the uranium ore is used. The deeper the mining process required to extract the ore, the higher the cost for mining companies, the greater the impact on the environment and the more resources needed to obtain the product. I t is clear that there is a strong sensitivity of energy and water consumption and greenhouse emissions to ore grade, and that ore grades are likely to continue to decline gradually in the medium to long term. These issues are critical to the current debate over nuclear power and greenhouse emissions, especially with respect to ascribing sustainability to such activities as uranium mining and milling. For example, mining at Roxby Downs is responsible for the emission of over one million tonnes of greenhouse gases per year and this could increase to four million tonnes if the mine is expanded.'

  12. Impact of {sup 210}PB from Osamu Utsumi mine on sediment of rivers in Caldas Region, Minas Gerais

    Energy Technology Data Exchange (ETDEWEB)

    Dutra, Pedro Henrique; Menezes, Maria Angela B.C. de; Moreira, Rubens Martins; Carvalho Filho, Carlos Alberto de, E-mail: phd@cdtn.br, E-mail: menezes@cdtn.br, E-mail: rubens@cdtn.br, E-mail: cacf@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)

    2013-07-01

    The Osamu Utsumi Mine of the Industrias Nucleares do Brasil (INB) is located in Caldas region, Minas Gerais, Brazil. It is a uranium mining and is in process of shutdown, decommissioning stage. CDTN/CNEN (Nuclear Technology Development Center, sponsored by Brazilian Commission for Nuclear Energy) is participating in this decommission step. One contribution will be the characterization of the environmental liability, determining the impact on the environment caused by mining activities. Several radionuclides are being analysed in diversified matrixes, however, this paper is about determination of {sup 210}Pb in sediment of rivers. One reason to analyse {sup 210}Pb is due to its long half-life (22.3 years) that may point out the carrier of {sup 222}Rn, {sup 226}Ra, {sup 228}Ra, even U, in the region. Besides, it may be used to date sediment. The methodology applied to determine the {sup 210}Pb activity in sediment was gamma spectrometry that was established at CDTN during the development of this study. The results confirmed the impact of the uranium mining on the environment. (author)

  13. Impact of 210PB from Osamu Utsumi mine on sediment of rivers in Caldas Region, Minas Gerais

    International Nuclear Information System (INIS)

    Dutra, Pedro Henrique; Menezes, Maria Angela B.C. de; Moreira, Rubens Martins; Carvalho Filho, Carlos Alberto de

    2013-01-01

    The Osamu Utsumi Mine of the Industrias Nucleares do Brasil (INB) is located in Caldas region, Minas Gerais, Brazil. It is a uranium mining and is in process of shutdown, decommissioning stage. CDTN/CNEN (Nuclear Technology Development Center, sponsored by Brazilian Commission for Nuclear Energy) is participating in this decommission step. One contribution will be the characterization of the environmental liability, determining the impact on the environment caused by mining activities. Several radionuclides are being analysed in diversified matrixes, however, this paper is about determination of 210 Pb in sediment of rivers. One reason to analyse 210 Pb is due to its long half-life (22.3 years) that may point out the carrier of 222 Rn, 226 Ra, 228 Ra, even U, in the region. Besides, it may be used to date sediment. The methodology applied to determine the 210 Pb activity in sediment was gamma spectrometry that was established at CDTN during the development of this study. The results confirmed the impact of the uranium mining on the environment. (author)

  14. The impact of birch seedlings on evapotranspiration from a mined peatland: an experimental study in southern Quebec, Canada

    Directory of Open Access Journals (Sweden)

    E. Fay

    2009-03-01

    Full Text Available Dense stands of birch (Betula spp. on abandoned peat workings have often been identified as potential barriers to site restoration, but little research has been conducted to evaluate their impact on water resources. The objective of this experimental study was to determine whether birch seedlings established on an abandoned mined peatland in eastern Canada had a significant impact on evapotranspiration. Transpiration rates from birch seedlings planted in containers filled with Sphagnum compost were measured gravimetrically. Unplanted containers were used to similarly measure evaporation rates from bare peat. On average, the measured rates of evaporation (per unit area from peat were 2.5 times the rates of transpiration from birch leaves. However, if the total leaf area of a dense birch population established on an abandoned mined peatland is considered, the total amount of water lost through birch transpiration could be higher than that lost by evaporation from the peat surface. This study provides a rough estimate of potential water losses due to birch seedling transpiration, and indicates that a dense population of birch on a mined peatland may influence site hydrology even at the early establishment phase (seedlings. Consequently, recently abandoned mined peatlands should be restored rapidly to prevent the establishment of birch trees.

  15. Distribution and Identification of Sources of Heavy Metals in the Voghji River Basin Impacted by Mining Activities (Armenia

    Directory of Open Access Journals (Sweden)

    A. V. Gabrielyan

    2018-01-01

    Full Text Available The objective of this research is to assess the distribution of heavy metals in the waters and sediments of the Voghji River and its tributaries impacted by mining activity and to reveal the real source of each of the heavy metals in the environment for assessing the pollution level of heavy metals. Voghji River with two main tributaries (Geghi and Norashenik drain two mining regions. To identify distribution and pollution sources of heavy metals, the water and sediment samples were collected from eight sampling sites. The results of statistical analysis based on data sets of the period 2014–2016 showed that, after the influence of drainage water and wastewater of mining regions, heavy metal contents in the Voghji River basin dramatically increased. The waters of the Voghji River were highly polluted by Mn, Co, Cu, Zn, Mo, Cd, and Pb. The relation of metals content was highly changed due to anthropogenic impact disturbing the geochemical balance of the Voghji River. The water quality based on only heavy metal contents in the source of the Voghji River belongs to “good” chemical status, and in the sources of Geghi and Norashenik Rivers it is “moderate.” The water quality of Voghji and Norashenik Rivers is sharply worsening after the influence of mining activity, becoming “bad” chemical status. The research revealed the pollution sources of each metal.

  16. Impact of Targeted Tuberculosis Vaccination Among a Mining Population in South Africa: A Model-Based Study.

    Science.gov (United States)

    Shrestha, Sourya; Chihota, Violet; White, Richard G; Grant, Alison D; Churchyard, Gavin J; Dowdy, David W

    2017-12-15

    Optimizing the use of new tools, such as vaccines, may play a crucial role in reaching global targets for tuberculosis (TB) control. Some of the most promising candidate vaccines target adults, although high-coverage mass vaccinations may be logistically more challenging among this population than among children. Vaccine-delivery strategies that target high-risk groups or settings might yield proportionally greater impact than do those that target the general population. We developed an individual-based TB transmission model representing a hypothetical population consisting of people who worked in South African gold mines or lived in associated labor-sending communities. We simulated the implementation of a postinfection adult vaccine with 60% efficacy and a mean effect duration of 10 years. We then compared the impact of a mine-targeted vaccination strategy, in which miners were vaccinated while in the mines, with that of a community-targeted strategy, in which random individuals within the labor-sending communities were vaccinated. Mine-targeted vaccination averted an estimated 0.37 TB cases per vaccine dose compared with 0.25 for community-targeted vaccination, for a relative efficacy of 1.46 (95% range, 1.13-1.91). The added benefit of mine-targeted vaccination primarily reflected the disproportionate demographic burden of TB among the population of adult males as a whole. As novel vaccines for TB are developed, venue-based vaccine delivery that targets high-risk demographic groups may improve both vaccine feasibility and the impact on transmission. © The Author(s) 2017. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  17. Assessing Resiliency in a Large Lake Receiving Mine Tailings Waste: Impacts of Major Environmental Disturbance.

    Science.gov (United States)

    Petticrew, Ellen; Owens, Philip; Albers, Sam

    2016-04-01

    On 4th August 2014, the tailings impoundment of the Mount Polley copper and gold mine in British Columbia failed. Material from the impoundment (surface area = 2.7 km2) flowed into nearby Polley Lake and Hazeltine Creek, before discharging into Quesnel Lake, a large (ca. 100 km long, >500 m deep), relatively pristine lake. Initial estimates suggest that approximately 25 Mm3 of tailings (water and solids) and eroded soils and surficial materials from Hazeltine Creek were delivered to Quesnel Lake, raising the lake by 7.7 cm. Much of this material was deposited at the bottom of Quesnel Lake but a plume of fine-grained sediment (D50 of ca. 1 μm) remained suspended in the water column. The impact of the distribution of this sediment was monitored over the next 15 months using water column profiling for temperature, conductivity, fluorescence and turbidity with depth. The plume movement was regulated by natural processes associated with the physical limnology of this large fjord lake, specifically, seiche events which transferred suspended particles both up-lake, against the flow regime, and down-lake into the Quesnel River. Samples of lake water and bottom sediment taken from the impacted area show elevated levels of total metals and other elements, which may have important ecosystem implications in this watershed. Indeed, the breach occurred at a time when a peak run of sockeye salmon were returning to their natal streams in the Quesnel basin. Zooplankton sampling for metals was initiated in fall 2014 to determine up take of metals into the food web. This poster describes the failure of the impoundment dam and presents results of sampling the aquatic environment over the first fifteen months of impact.

  18. Restoration of the water balance in the lignite mining areas of central Germany and Lusatia; Sanierung des Wasserhaushalts in den Braunkohlenbergbaugebieten Mitteldeutschlands und der Lausitz

    Energy Technology Data Exchange (ETDEWEB)

    Benthaus, Friedrich-Carl [Lausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH (LMBV), Senftenberg (Germany). Ingenieurbereich Sanierung, Strategie und Entwicklung; Scholz, Eckhard [Lausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH (LMBV), Senftenberg (Germany). Ingenieurbereich Sanierung; Uhlig, Christiane [Lausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH (LMBV), Senftenberg (Germany). Ingenieurbereich Sanierung, Geotechnik Mitteldeutschland; Heine, Rudi [Lausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH (LMBV), Senftenberg (Germany). Ingenieurbereich Sanierung, Planung Wasserbau Lausitz; Totsche, Oliver [Lausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH (LMBV), Senftenberg (Germany). Ingenieurbereich Sanierung, Geotechnik Lausitz

    2010-10-15

    The lignite mining industry in central Germany and Lusatia has interfered with the water balance in the regions by long-standing lowering of the ground water and changing of the surface waters. The restoration is aimed at re-establishment of a largely self-regulating water balance by flooding and aftercare. The planning of the linkage of the 220 lakes in the aftermath of the mining industry to the public waterway network should be based on the conditions prevailing after abandonment of the mining industry. Innovative geochemical and biological processes are being further developed to improve the water quality, which is characterised by oxidation of the iron sulphides. (orig.)

  19. Impact of Peat Mining and Restoration on Methane Turnover Potential and Methane-Cycling Microorganisms in a Northern Bog.

    Science.gov (United States)

    Reumer, Max; Harnisz, Monika; Lee, Hyo Jung; Reim, Andreas; Grunert, Oliver; Putkinen, Anuliina; Fritze, Hannu; Bodelier, Paul L E; Ho, Adrian

    2018-02-01

    Ombrotrophic peatlands are a recognized global carbon reservoir. Without restoration and peat regrowth, harvested peatlands are dramatically altered, impairing their carbon sink function, with consequences for methane turnover. Previous studies determined the impact of commercial mining on the physicochemical properties of peat and the effects on methane turnover. However, the response of the underlying microbial communities catalyzing methane production and oxidation have so far received little attention. We hypothesize that with the return of Sphagnum spp. postharvest, methane turnover potential and the corresponding microbial communities will converge in a natural and restored peatland. To address our hypothesis, we determined the potential methane production and oxidation rates in natural (as a reference), actively mined, abandoned, and restored peatlands over two consecutive years. In all sites, the methanogenic and methanotrophic population sizes were enumerated using quantitative PCR (qPCR) assays targeting the mcrA and pmoA genes, respectively. Shifts in the community composition were determined using Illumina MiSeq sequencing of the mcrA gene and a pmoA -based terminal restriction fragment length polymorphism (t-RFLP) analysis, complemented by cloning and sequence analysis of the mmoX gene. Peat mining adversely affected methane turnover potential, but the rates recovered in the restored site. The recovery in potential activity was reflected in the methanogenic and methanotrophic abundances. However, the microbial community composition was altered, being more pronounced for the methanotrophs. Overall, we observed a lag between the recovery of the methanogenic/methanotrophic activity and the return of the corresponding microbial communities, suggesting that a longer duration (>15 years) is needed to reverse mining-induced effects on the methane-cycling microbial communities. IMPORTANCE Ombrotrophic peatlands are a crucial carbon sink, but this environment

  20. The Impact Implementation Program of Corporate Social Responsibity of PT. Kuansing Inti Makmur Toward Society Development Around Mining Area

    Directory of Open Access Journals (Sweden)

    Marisa Oktavia

    2018-03-01

    Full Text Available This study aims to determine the impact implementation of corporate social responsibility (CSR program PT. Kuansing Inti Makmur (PT KIM towards the development of communities around the tambanag area and impact of the program. The company's mission is to build sustainable growth through high standards of occupational safety, development of good community programs and robust environmental management. Corporate social responsibility has become one of the most important issues facing the mining industry. Every mining activity is required to develop and empower the communities surrounding the mining area. This is stated in Permen ESDM No 41 of 2016. Techniques in determining informants are taken by purposive sampling, the community development program consists of four areas: education, health, economics and infrastructure. Data processing research using descriptive qualitative analysis. Based on the results of research can be concluded that the impact implementation of CSR programs on community development in the education is felt by the community is enough to help with the percentage of 60%, the health field is felt by the public is enough to help with the percentage of 60%, the perceived the community's economy has less impact on economic improvement with 51% percentage, infrastructure perceived the community is very helpful with 80% percentage.

  1. Hydrology and erosion impacts of mining derived coastal sand dunes, Chanaral Bay, Chile

    Science.gov (United States)

    Daniel G. Neary; Pablo Garcia-Chevesich

    2008-01-01

    Chile has an economy strongly based on the exploitation of its natural resources. Copper mining represents the main export monetary income, employing thousands of people all along the country. The Chilean Copper Corporation (CODELCO), El Salvador branch, has been the primary mining company, but it will be ending most of its activities by 2011 unless copper prices stay...

  2. Arsenic enrichment in estuarine sediments-impact of iron and manganese mining

    Digital Repository Service at National Institute of Oceanography (India)

    Nair, M.; Joseph, T.; Balachandran, K.K.; Nair, K.K.C.; Paimpillii, J.S.

    River Mandovi and Zuari, Goa (west coast of India) are flowing through iron and manganese mining areas and are heavily used for iron and manganese ore transport. This region generates 25-30 million tons of mining rejects per year. The iron ore...

  3. Impact of mine dumps on transport the invasive plant species to Upper Silesia

    Science.gov (United States)

    Sotkova, N.; Lokajickova, B.; Mec, J.; Svehlakova, H.; Stalmachova, B.

    2017-10-01

    Human activities significantly change the species composition in the area. The main factor of change was the mining industry, which changed the natural conditions on Upper Silesia. The anthropogenic relief of mine dumps are the main centre of alien plant in an industrial landscape. The poster deals with the state of the invasive plant species by the phyto-sociological surveys on Upper Silesia.

  4. Impact of seismicity on surface in mining affected areas: general description

    Czech Academy of Sciences Publication Activity Database

    Kaláb, Zdeněk

    2004-01-01

    Roč. 1, č. 1 (2004), s. 35-39 ISSN 1211-1910. [Mining and Environmental geophysics/29./. Sedmihorky, 00.06.2003] R&D Projects: GA ČR GA105/03/0078 Institutional research plan: CEZ:AV0Z3086906 Keywords : seismicity * mining affected areas Subject RIV: DC - Siesmology, Volcanology, Earth Structure

  5. An Innovative Carbonate Coprecipitation Process For The Removal Of Zinc And Manganese From Mining Impacted Waters

    Science.gov (United States)

    Although mine drainage is usually thought of as acidic, there are many cases where the water is of neutral pH, but still contains metal species that can be harmful to human or aquatic animal health, such as manganese (Mn) and zinc (Zn). Typical treatment of mine drainage waters ...

  6. Sediment radioisotope dating across a stratigraphic discontinuity in a mining-impacted lake.

    Science.gov (United States)

    McDonald, C P; Urban, N R

    2007-01-01

    Application of radioisotope sediment dating models to lakes subjected to large anthropogenic sediment inputs can be problematic. As a result of copper mining activities, Torch Lake received large volumes of sediment, the characteristics of which were dramatically different from those of the native sediment. Commonly used dating models (CIC-CSR, CRS) were applied to Torch Lake, but assumptions of these methods are violated, rendering sediment geochronologies inaccurate. A modification was made to the CRS model, utilizing a distinct horizon separating mining from post-mining sediment to differentiate between two focusing regimes. (210)Pb inventories in post-mining sediment were adjusted to correspond to those in mining-era sediment, and a sediment geochronology was established and verified using independent markers in (137)Cs accumulation profiles and core X-rays.

  7. The impact of the structural features of the rock mass on seismicity in Polish coal mines

    Science.gov (United States)

    Patyńska, Renata

    2017-11-01

    The article presents seismic activity induced in the coal mines of the Upper Silesian Coal Basin (GZW) in relation to the locations of the occurrence of rockbursts. The comparison of these measurements with the structural features of the rock mass of coal mines indicates the possibility of estimating the so-called Unitary Energy Expenditure (UEE) in a specific time. The obtained values of UEE were compared with the distribution of seismic activity in GZW mines. The level of seismic activity in the analysed period changed and depended on the intensity of mining works and diverse mining and geological conditions. Five regions, where tremors occurred (Bytom Trough, Main Saddle, Main Trough, Kazimierz Trough, and Jejkowice and Chwałowice Trough) which belong to various structural units of the Upper Silesia were analyzed. It was found out that rock bursts were recorded only in three regions: Main Saddle, Bytom Trough, and Jejkowice and Chwałowice Trough.

  8. From old lignite mining pits to new lakes. The example of rehabilitation of the former open-cast mining facilities at Berzdorf, Germany; Von alten Gruben zu neuen Seen am Beispiel des Tagebaues Berzdorf

    Energy Technology Data Exchange (ETDEWEB)

    Kolba, Manfred [LMBV mbH, Sanierungsbereich Lausitz, Senftenberg (Germany)

    2009-09-15

    The Lausitz and Central-German Mining Administration Company (LMBV) is project executor for the largest landscaping construction site in Europe. LMBV rehabilitates former open-cast mining facilities, as well as decommissioned coal-upgrading plants, to provide promising future areas for industrial complexes, and for landscapes that will attract a great number and variety of tourism developments. LMBV executes projects for the elimination of dangers as a result of the rising of groundwater to its former and natural level. In this context, the German Federal States involved in past and present lignite mining support extensive measures for enhancement of the standard of future use at the new lakes in Central Germany and in the Lausitz Region. This presentation shows the rehabilitation activities of LMBV as project executor in a great range of activities, by explaining the rehabilitation and transformation of the former lignite mining facilities in Berzdorf, Germany, in creation of the future Berzdorf Lake. (orig.)

  9. Impact of the oil price and fiscal facilities on offshore mining at the Dutch Continental Shelf

    International Nuclear Information System (INIS)

    Cate, Arie ten; Mulder, Machiel

    2007-01-01

    The surge in the oil price has raised questions about the magnitude of global reserves of oil. According to some analysts, the current high oil prices indicate a looming decline in the global production of oil. Others believe, however, that the increased level of the oil price encourages exploration and production activities, bringing the oil price to a lower equilibrium level in the near future. In this paper, we assess the impact of the unit profit (depending on the oil price) as well as fiscal facilities on the level of exploration and development drillings in the Dutch Continental Shelf. We conducted an econometric analysis of exploration and development drillings in the Dutch Continental Shelf over the period 1981-2003. Except a few fiscal changes, the regulatory framework for offshore activities in the Netherlands, the so-called 'small fields policy' was unchanged in this period. We find that the expected unit profit based on a moving average of the oil price significantly explains the level of both exploration and development drillings. In addition, the analysis suggests that fiscal facilities have only a temporary effect on exploration activities but are more important for development activities. We conclude that the oil price is a major economic incentive for activities of the mining industry

  10. La correspondance de jeunesse d’Henri Poincaré les années de formation de l'École polytechnique à l'École des mines (1873-1878)

    CERN Document Server

    2017-01-01

    Ce cinquième volume de la correspondance d’Henri Poincaré rassemble l’ensemble des lettres envoyées par le mathématicien à sa famille durant ses années de formation à l’École polytechnique puis à l’École des mines de Paris. De 1873 à 1878, Poincaré écrit plus de 300 lettres à sa mère, à sa sœur et à son père. Une part importante de cette correspondance concerne ses études pour devenir ingénieur. Poincaré évoque ainsi les différents événements – importants ou anodins – qui ponctuent son parcours de formation dans les deux écoles: les cours et les examens, les voyages d’études en France et à l’étranger, les relations avec les professeurs, les rituels étudiants, la naissance de ses ambitions mathématiques. Cependant, ces lettres de jeunesse permettent également de reconstituer les réseaux familiaux et amicaux de Poincaré ainsi que l’univers socio-culturel dans lequel il évolue dans les années 1870. Elles fourmillent donc de récits pittoresques sur ses visit...

  11. Mesures experimentales de l'impact des revetements hydrophobeset superhydrophobes sur la trainee et la portance d'un profil aerodynamique propre et glace

    Science.gov (United States)

    Villeneuve, Eric

    Ce projet, realise a la demande du Laboratoire International des Materiaux Antigivre, a pour but de mesurer et definir experimentalement l'impact de revetements hydrophobes sur les coefficients de trainee et de portance d'un profil NACA 0012. Pour ce faire, la balance aerodynamique du LIMA devait tout d'abord etre amelioree afin d'offrir une sensibilite suffisante pour realiser le projet. Plusieurs ameliorations ont ete faites, comme le changement des cellules de charge, la diminution du nombre de cellules de charge, le changement du cadre de la balance, etc. Une fois ces ameliorations terminees, la reproductibilite, l'exactitude et la sensibilite ont ete valides afin de s'assurer de la fiabilite des resultats offerts par la balance. Pour les angles d'attaque etudies avec les revetements, soient -6° et 0°, la balance a une reproductibilite de +/-2,06% a 360 000 de nombre de Reynolds. Pour valider la sensibilite, des essais a -6° et 0° d'angle d'attaque et des nombres de Reynolds de 360 000 et 500 000 ont ete faits avec des papiers sables. Les resultats de ces essais ont permis de, tracer des courbes de tendances du coefficient de trainee du NACA 0012 en fonction de la rugosite de surface et d'etablir la valeur de la sensibilite de la balance a +/-8 mu m. Cinq revetements populaires ont ete choisis pour l'experimentation, soient le Wearlon, le Staclean, le Hirec, le Phasebreak ainsi que le Nusil. Les revetements sont soumis aux memes conditions experimentales que les papiers sables, et une rugosite equivalente est trouvee par extrapolation des resultats. Cependant, les rugosites equivalentes de surfaces different entre -6° et 0°. Les essais avec le Staclean et le Hirec donnent des coefficients de trainee equivalent a ceux avec l'aluminium, alors que le Wearlon, le Nusil et le Phasebreak donnent une augmentation du coefficient de trainee de 13%, 17% et 25% respectivement par rapport a l'aluminium. Pour les coefficients de portance, la balance ne detecte pas l

  12. Local Sustainability and Gender Ratio: Evaluating the Impacts of Mining and Tourism on Sustainable Development in Yunnan, China

    Directory of Open Access Journals (Sweden)

    Ganlin Huang

    2015-01-01

    Full Text Available This study employed rapid evaluation methods to investigate how the leading industries of mining and tourism impact sustainability as manifest through social, economic and environmental dimensions in Yunnan, China. Within the social context, we also consider the differentiated impact on gender ratio—which is a salient feature of sustained development trajectories. Our results indicate that mining areas performed better than tourism areas in economic aspects but fell behind in social development, especially regarding the issue of gender balance. Conclusions on environmental status cannot be drawn due to a lack of data.  The results from the environmental indicators are mixed. Our study demonstrates that rapid evaluation using currently available data can provide a means of greater understanding regarding local sustainability and highlights areas that need attention from policy makers, agencies and academia.

  13. Local sustainability and gender ratio: evaluating the impacts of mining and tourism on sustainable development in Yunnan, China.

    Science.gov (United States)

    Huang, Ganlin; Ali, Saleem

    2015-01-19

    This study employed rapid evaluation methods to investigate how the leading industries of mining and tourism impact sustainability as manifest through social, economic and environmental dimensions in Yunnan, China. Within the social context, we also consider the differentiated impact on gender ratio-which is a salient feature of sustained development trajectories. Our results indicate that mining areas performed better than tourism areas in economic aspects but fell behind in social development, especially regarding the issue of gender balance. Conclusions on environmental status cannot be drawn due to a lack of data.  The results from the environmental indicators are mixed. Our study demonstrates that rapid evaluation using currently available data can provide a means of greater understanding regarding local sustainability and highlights areas that need attention from policy makers, agencies and academia.

  14. Local Sustainability and Gender Ratio: Evaluating the Impacts of Mining and Tourism on Sustainable Development in Yunnan, China

    Science.gov (United States)

    Huang, Ganlin; Ali, Saleem

    2015-01-01

    This study employed rapid evaluation methods to investigate how the leading industries of mining and tourism impact sustainability as manifest through social, economic and environmental dimensions in Yunnan, China. Within the social context, we also consider the differentiated impact on gender ratio—which is a salient feature of sustained development trajectories. Our results indicate that mining areas performed better than tourism areas in economic aspects but fell behind in social development, especially regarding the issue of gender balance. Conclusions on environmental status cannot be drawn due to a lack of data.  The results from the environmental indicators are mixed. Our study demonstrates that rapid evaluation using currently available data can provide a means of greater understanding regarding local sustainability and highlights areas that need attention from policy makers, agencies and academia. PMID:25607602

  15. Evaluation of the impact and the releases of operating nuclear facilities; Evaluation de l'impact et des rejets des installations nucleaires en fonctionnement normal

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    The monitoring of nuclear installations releases, the associated impacts evaluation and the radiation monitoring of the environment are of an increase interest since the last ten years. Theses two days, organized by the environment section of the SFRP (French Society of Radiation Protection), aim to discuss the following topics: the development of the methods to improve radioactive elements and toxic substances releases in the environment; the structure of the environment control and the objectives of this control; the association of the local actors to the releases monitoring and to the environment control; the perspectives of evolution in matter of nuclear facilities releases management. (A.L.B.)

  16. Impact of drilling activities in warm sea: recolonization capacities of seabed; Impact des activites de forage en mer chaude: capacites de recolonisation des fonds marins

    Energy Technology Data Exchange (ETDEWEB)

    Dalmazzone, Ch.; Blanchet, D. [Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France); Lamoureaux, S.; Dutrieux, E.; Durieu, J. [CreOcean, 34 - Montpellier (France); Camps, R. [Total, 64 - Pau (France); Galgani, F. [Ifremer, 34 - Sete (France)

    2004-07-01

    Due to large constraints in environmental regulations, discharge of drill cuttings at sea has to be controlled. It is therefore necessary to get basic information in order to select environment friendly drilling fluids. The present study was intended to assess the impact of cuttings, the capacity of regeneration of the ecosystem and the processes of recolonization of sea-beds. In a first phase, standardized (OSPAR) and experimental toxicity tests, aerobic and anaerobic degradation measurements and lixiviation tests were performed on various types of muds and cuttings (containing diesel oil, two different paraffinic oils, and glycol) in laboratory conditions. In a second phase, the most suitable measurements were taken within the framework of an in situ experiment at a discharge site in Congo (Africa). Cuttings discharge began in November 1993 and ended in April 1999. Together with this survey, a complete analysis of benthos was per formed eight years after the beginning of cuttings discharge. The preliminary results demonstrated: - the zone of extension of the toxicity inducing benthos modifications was less than a few hundred meters around the discharge site; - original fauna was replaced by a more specific fauna. In the more general context of the environmental constraints in the oil industry, our work demonstrated the containment of the impacted zones, the absence of significant risks of modification of the adjacent ecosystems and the possible application to other discharge sites. (authors)

  17. Liste des auteurs

    OpenAIRE

    2016-01-01

    Madeleine Akrich      Ecole des Mines – Centre de Sociologie de l’innovation – Paris Noël Barbe      Association comtoise des Arts et Traditions populaires – Besançon Lucien Bernot      Ecole des hautes études en sciences sociales (EHESS) – Paris Anni Borzeix      Centre national de la recherche scientifique (CNRS) –     Groupement d’intérêt public (GIP) « Mutations industrielles » – Paris François Boudarias      Laboratoire d’Anthropologie et de sociologie de Tours (LAST) Dominique Boullier ...

  18. Radium balance in discharge waters from coal mines in Poland the ecological impact of underground water treatment

    International Nuclear Information System (INIS)

    Chalupnik, S.; Wysocka, M.

    2008-01-01

    Saline waters from underground coal mines in Poland often contain natural radioactive isotopes, mainly 226 Ra from the uranium decay series and 228 Ra from the thorium series. More than 70% of the total amount of radium remains underground as radioactive deposits due to spontaneous co-precipitation or water treatment technologies, but several tens of MBq of 226 Ra and even higher activity of 228 Ra are released daily into the rivers along with the other mine effluents from all Polish coal mines. Mine waters can have a severe impact on the natural environment, mainly due to its salinity. Additionally high levels of radium concentration in river waters, bottom sediments and vegetation were also observed. Sometimes radium concentrations in rivers exceeded 0.7 kBq/m 3 , which was the permitted level for wastewaters under Polish law. The investigations described here were carried out for all coal mines and on this basis the total radium balance in effluents has been calculated. Measurements in the vicinity of mine settling ponds and in rivers have given an opportunity to study radium behaviour in river waters and to assess the degree of contamination. For removal of radium from saline waters a method of purification has been developed and implemented in full technical scale in two of Polish coal mines. The purification station in Piast Colliery was unique, the first underground installation for the removal of radium isotopes from saline waters. Very good results have been achieved - approximately 6 m 3 /min of radium-bearing waters were treated there, more than 100 MBq of 226 Ra and 228 Ra remained underground each day. Purification has been started in 1999, therefore a lot of experiences have been gathered during this period. Since year 2006, a new purification station is working in another colliery, Ziemowit, at the level -650 meters. Barium chloride is used as a cleaning , agent, and amount of water to be purified is reaching 9 m 3 /min. Technical measures such as

  19. Impact of heavy metal contamination on oxidative stress of Eisenia andrei and bacterial community structure in Tunisian mine soil.

    Science.gov (United States)

    Boughattas, Iteb; Hattab, Sabrine; Boussetta, Hamadi; Banni, Mohamed; Navarro, Elisabeth

    2017-08-01

    The aims of this work were firstly to study the effect of heavy metal-polluted soils from Tunisian mine on earthworm biochemical biomarkers and on bacterial communities and therefore to analyze the interaction between earth worms and bacterial communities in these contaminated soils. For this purpose, we had introduced earthworm Eisenia andrei in six soils: one from mine spoils and five from agricultural soils, establishing a gradient of contamination. The response of worms to the presence of heavy metal was analyzed at the biochemical and transcriptional levels. In a second time, the impact of worm on bacterial community structure was investigated using automated ribosomal intergenic spacer analysis (ARISA) fingerprinting. An impact of heavy metal-contaminated soils on the oxidative status of E. andrei was observed, but this effect was dependent of the level of heavy metal contamination. Moreover, our results demonstrate that the introduction of earthworms E. andrei has an impact on bacterial community; however, the major change was observed in the less contaminated site. Furthermore, a significant correlation between earthworm oxidative status biomarkers and bacterial community structure was observed, mainly in the mine spoils. Therefore, we contribute to a better understanding of the relationships between epigenic earthworms and bacterial communities in heavy metal-contaminated soils.

  20. Impact of marine pollution on living resources - Case studies on the effect of mining activity and organic enrichment of benthic fauna

    Digital Repository Service at National Institute of Oceanography (India)

    Ansari, Z.A.; Shirwaikar, P.

    Mine rejects, organic effluents and domestic sewage are the three main items discharged in the Mandovi Estuary, Goa, India. Their impact on the benthic life was studied. Benthic samples in this estuary were collected at monthly intervals using van...

  1. Impact of potash mining in streams: the Llobregat basin (northeast Spain as a case study

    Directory of Open Access Journals (Sweden)

    Ruben Ladrera

    2016-12-01

    Full Text Available Potash mining is significantly increasing the salt concentration of rivers and streams due to lixiviates coming from the mine tailings. In the present study, we have focused on the middle Llobregat basin (northeast Spain, where an important potash mining activity exists from the beginning of the XX century. Up to 50 million tonnes of saline waste have been disposed in the area, mainly composed of sodium chloride. We assessed the ecological status of streams adjacent to the mines by studying different physicochemical and hydromorphological variables, as well as aquatic macroinvertebrates. We found extraordinary high values of salinity in the studied streams, reaching conductivities up to 132.4 mS/cm. Salt-polluted streams were characterized by a deterioration of the riparian vegetation and the fluvial habitat. Both macroinvertebrate richness and abundance decreased with increasing salinity. In the most polluted stream only two families of macroinvertebrates were found: Ephydridae and Ceratopogonidae. According to the biotic indices IBMWP and IMMi-T, none of the sites met the requirements of the Water Framework Directive (WFD; i.e., good ecological status. Overall, we can conclude that potash-mining activities have the potential to cause severe ecological damage to their surrounding streams. This is mainly related to an inadequate management of the mine tailings, leading to highly saline runoff and percolates entering surface waters. Thus, we urge water managers and policy makers to take action to prevent, detect and remediate salt pollution of rivers and streams in potash mining areas.

  2. An Information Framework for Facilitating Cost Saving of Environmental Impacts in the Coal Mining Industry in South Africa

    Directory of Open Access Journals (Sweden)

    Mashudu D. Mbedzi

    2018-05-01

    Full Text Available Coal-mining contributes much to the economic welfare of a country. Yet it brings along a number of challenges, notably environmental impacts which include water pollution in a water scarce country such as South Africa. This research is conducted in two phases. The first phase intends to establish environmental and other challenges brought about by the coal-mining industry through a comprehensive analysis of available literature. Combatting these challenges is costly; consequently, our work investigates how established management accounting tools and techniques such as Environmental Management Accounting (EMA, Material Flow Cost Accounting (MFCA and Life Cycle Costing (LCC may facilitate cost savings for the companies involved. These techniques promote increased transparency of material usage by tracing and quantifying the flows and inventories of materials within the coal-mining industry in physical and monetary terms, hence hidden costs are elicited. The researchers postulate that an Information Framework integrating these aspects may be the way forward. To this end existing frameworks in the literature are identified. A number of research questions embodying the above aspects are defined and the objective is to define a conceptual framework to facilitate cost savings for coal-mining companies. The main contribution of this work is an information framework presented towards the end of this article. The second phase of the research will involve fieldwork in the form of a survey among stakeholders in industry to validate the conceptual framework.

  3. The Impact of Patient Education on Diabetes Empowerment Scale (DES) and Diabetes Attitude Scale (DAS-3) in Patients with Type 2 Diabetes

    OpenAIRE

    ATAK, Nazlı; KÖSE, Kenan; GÜRKAN, Tanju

    2008-01-01

    Aim: This study was conducted to assess the impact of a brief, patient-centered education program on perceived self-efficacy and attitudes towards diabetes of patients with type 2 diabetes. Materials and Methods: A randomized controlled study was designed and conducted to assess the impact of education using the DES (Diabetes Empowerment Scale) and DAS-3 (Diabetes Attitude Questionnaire-3), which were administered using a pre- and post-test design. A patient-centered education program was d...

  4. Les nouvelles formes de la communication autour des projets urbains : modalités, impacts, enjeux pour un débat participatif

    Directory of Open Access Journals (Sweden)

    Hélène Bailleul

    2008-09-01

    Full Text Available Dans cet article, nous observons les évolutions que l’usage des nouvelles technologies implique dans la communication autour des projets urbains. Notre analyse des nouvelles modalités qu’Internet a pu importer dans la participation des habitants aux projets urbains (partie 1 nous pousse à observer, plus spécifiquement, les modifications qui ont trait, dans ce contexte, à la nature et au statut de l’information sur l’espace. La démocratisation des techniques de représentation de l’espace par ordinateur (3D, simulation entraîne le recours quasi systématique à des images virtuelles du projet, d’une grande qualité (partie 2, mais dont on ne connaît que très peu les impacts sur la perception et la réception que les habitants font du projet (partie 3.In this article, we observe the evolutions involved by the use of new technology in the communication around urban projects. Our analysis of the new modalities, Internet was able to import in the participation of inhabitants in urban projects (chapter 1 urges us to examine, more specifically, the modifications concerning the nature and the status of the information about space. The democratization of computer-based spatial representation’s tools (3D, simulation entails more and more systematic recourse to virtual images of the project, with high definition (chapter 2. But, nowadays, we still know little about their impacts on the perception and the reception, the inhabitants make of the project (chapter 3.

  5. Environmental research - development of the material balance of oak tree ecosystems on quaternary spoil bank substrates of coal mines; Umweltforschung - Entwicklung des Stoffhaushaltes von Eichenoekosystemen auf quartaeren Kippsubstraten des Braunkohlenbergbaues

    Energy Technology Data Exchange (ETDEWEB)

    Katzur, J.; Knoche, D.

    2000-07-01

    Investigations have shown that even the very first forest generation on spoil banks already have high vitality. However, it is well known that pioneering terrestrial ecosystems have a high water and material turnover dynamics which will quickly influence the soil at that site but is not an indication of the development of a stable ecosystem. Long-term measurements were therefore made in oak forest ecosystems on quaternary spoil bank sands in order to achieve a quantification (Boxberg: Q. rubra L., 2 years; Kleinleipisch: Q. rubra L., 21 years; Annahuetter: Q. rubra L., 63 years). The results were compared with a virgin soil reference site (Neusorgefeld: Q. rubra L., 41 years). [German] Seit Jahrzehnten praegen Braunkohlentagebaue das Landschaftsbild und den Wasserhaushalt der Niederlausitz. Bislang wurden ca. 770 km{sup 2} ueberwiegend forstlich genutzter Flaechen devastiert und auf 2.100 km{sup 2} rund 9,5 Mrd. m{sup 3} statischer Grundwasservorraete entnommen. Im Zuge der seit 1990 drastisch verringerten Kohlefoerderung und forcierten Bergbausanierung erreicht die Rekultivierungsflaeche zwischenzeitlich rund 450 km{sup 2}, wobei die forstliche Folgenutzung mit 60% der Flaeche dominiert. Zahlreiche wachstumskundliche Untersuchungen belegen, dass sich bereits in der ersten Waldgeneration auf Kippe wuechsige und vitale Bestaende etablieren. Vegetations- und ertragskundliche Parameter wie z.B. Artenzusammensetzung, Naehrstoffversorgung, laufender Zuwachs oder Vorratshaltung sind jedoch per se noch keine hinreichenden Kriterien zur Einschaetzung der Entwicklungsdynamik und damit des angestrebten Rekultivierungserfolgs. Bekannterweise zeichnen sich im Aufbau befindliche terrestrische Oekosysteme generell durch eine ausgepraegte Wasser- und Stoffdynamik aus, welche im Zuge bodengenetischer Prozesse meist eine rasche Standortveraenderung bewirkt. Da das Standortpotential zum Rekultivierungszeitpunkt nicht prognostiziert werden kann, ist offen, ob sich bereits in der

  6. Impacts de la déficience maternelle modérée en fer sur le développement des fonctions auditives et le métabolisme des acides gras et eicosanoïdes de la progéniture

    OpenAIRE

    Jougleux, Jean-Luc

    2015-01-01

    Tableau d'honneur de la Faculté des études supérieures et postdorales, 2014-2015 Cette étude a pour objectif de déterminer les impacts de la l’anémie ferriprive (AF) modérée durant la gestation et la lactation, sur les fonctions neurophysiologiques des voies auditives, ainsi que sur les fonctions métaboliques de la progéniture du cochon d’Inde (Cavia porcellus). Elle s’articule selon 2 volets d’études distincts (protocoles 1 et 2), basés tant sur la composition en fer des diètes, que sur l...

  7. Comparison of benthic macroinvertebrate indices for the assessment of the impact of acid mine drainage on an Irish river below an abandoned Cu-S mine

    International Nuclear Information System (INIS)

    Gray, N.F.; Delaney, E.

    2008-01-01

    A range of macroinvertebrate indices were compared to assess the most appropriate metric for the assessment of acid mine drainage (AMD) in a low alkalinity, highly erosional river in south-east Ireland. Differences were found in the ability of indices to discriminate AMD impact with the Brillouin, BMWP score, Margalef and Shannon Indices the most precise. Taxon richness was also strongly correlated with AMD indicator parameters (e.g. pH alkalinity, sulphate, Zn and Fe) at impacted sites being an equally reliable metric. The response of the community structure to AMD in this river does not fulfil the optimum criteria for either diversity or biological indices, which may explain the variation in the success of different indices seen in this and other studies. The development of indices that model the expected community response to AMD more accurately or are based on the response of indicator species to AMD pollutants are required. - Several indices were suitable for AMD impact assessment, although due to AMD and receiving water variability no single index may be universally reliable

  8. Comparison of benthic macroinvertebrate indices for the assessment of the impact of acid mine drainage on an Irish river below an abandoned Cu-S mine

    Energy Technology Data Exchange (ETDEWEB)

    Gray, N.F. [Centre for the Environment, Trinity College, Dublin 2 (Ireland)], E-mail: nfgray@tcd.ie; Delaney, E. [Centre for the Environment, Trinity College, Dublin 2 (Ireland)

    2008-09-15

    A range of macroinvertebrate indices were compared to assess the most appropriate metric for the assessment of acid mine drainage (AMD) in a low alkalinity, highly erosional river in south-east Ireland. Differences were found in the ability of indices to discriminate AMD impact with the Brillouin, BMWP score, Margalef and Shannon Indices the most precise. Taxon richness was also strongly correlated with AMD indicator parameters (e.g. pH alkalinity, sulphate, Zn and Fe) at impacted sites being an equally reliable metric. The response of the community structure to AMD in this river does not fulfil the optimum criteria for either diversity or biological indices, which may explain the variation in the success of different indices seen in this and other studies. The development of indices that model the expected community response to AMD more accurately or are based on the response of indicator species to AMD pollutants are required. - Several indices were suitable for AMD impact assessment, although due to AMD and receiving water variability no single index may be universally reliable.

  9. Data Mining and Information Technology: Its Impact on Intelligence Collection and Privacy Rights

    National Research Council Canada - National Science Library

    Soderberg, Eric; Glenney, William

    2007-01-01

    .... At a time when the threat environment has shifted in emphasis to COIN, terrorism, and cyber war, IT-enhanced data mining capabilities could provide some of the critical intelligence demanded by these types of threats...

  10. Impact of offshore placer mining experiments (PLAMEX) on the sediment size and heavy minerals

    Digital Repository Service at National Institute of Oceanography (India)

    Valsangkar, A.B.; Fernandes, D.

    Two offshore placer mining experiments (PLAMEX) were conducted using submersible pumps specially designed by Central Mechanical Engineering Research Institute (CMERI), Durgapur (India) at 8 m water depth in Kalbadevi Bay (PLAMEX-I), Ratnagiri...

  11. Environmental and Health Impacts of Small-scale Gold Mining in ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    ... and the pathways of contamination between gold mining/processing plants, river pollution, ... But, action on many levels is required to put this knowledge to use. ... mobilize relevant stakeholders and influence public policy toward preventing ...

  12. Siderite formation in mining lakes. Sanitation strategy for the Spreetal Nordost lake; Sideritbildung in Tagebaurestseen. Moegliche Sanierungsstrategie des Restlochs Spreetal Nordost

    Energy Technology Data Exchange (ETDEWEB)

    Unger, Y.; Wolkersdorfer, C. [Technische Univ. Bergakademie Freiberg (Germany)

    2006-07-01

    The treatment of acid mine lakes is a worldwide problem. In this study, it will be investigated since the sludge from acid mine drainage (AMD) treatment plants combined with carbon dioxide injections may improve the water quality in such pit lakes. Simultaneously, the emissions of carbon dioxide into the atmosphere may be reduced. The CO{sub 2} will be sequestered in the lake sediments as siderite (FeCO{sub 3}). The acid mine lake Spreetal-Nordost (Lusatia/Germany) was chosen as a test site. Since 1998 iron hydroxide sludge from an AMD treatment plant was deposited into the lake. In preliminary tests the feasibility of this treatment scheme will be investigated. (orig.)

  13. L'impact des développements scientifiques sur la résolution des problèmes techniques posés par la nouvelle conjoncture dans l'exploration et la production du pétrole Impact of Scientific Developments on the Solving of Technical Problems Raised by the New Economic Situation in Oil Exploration and Production

    Directory of Open Access Journals (Sweden)

    Tissot B.

    2006-11-01

    Full Text Available Dans les circonstances difficiles que traverse l'exploration et la production du pétrole, le savoir-faire technologique, associé à la maîtrise des coûts, seront pour l'industrie pétrolière et parapétrolière des atouts essentiels. On envisage ici l'impact prévisible des développements scientifiques sur la résolution des problèmes techniques dans l'exploration et la production. Les principales disciplines scientifiques concernées (géologie, géophysique, géochimie, mécanique des roches et des sols, mécanique des fluides, physicochimie des interfaces ainsi que trois techniques de base (modélisation, systèmes experts, matériaux nouveaux sont examinées dans ce sens. En particulier,la modélisation numérique voit son importance croître de manière spectaculaire : elle couvre désormais des domaines nouveaux, comme les Sciences de la Terre, et continue à s'enrichir de développements importants, même dans les secteurs où on l'utilise depuis 20 ans comme la production. Ces évolutions s'accompagneront nécessairement d'ajustements dans la formation des hommes et le fonctionnement des organisations; en particulier un espace nouveau pourrait se dégager pour de petites entreprises de conseil et de service plus riches en matière grise qu'en investissements lourds. In the difficult circumstances now confronting oil exploration and production, technical know-how combined with cost control will be essential assets for the petroleum and petroleum equipment and service industries. This article considers the foreseeable impact of scientific developments on the solving of technical problems in exploration and production. The principal scientific disciplines involved (geology, geophysics, geochemistry, rock and soil mechanics, fluid mechanics, interface physicochemistry as well as three basic techniques (modeling, expert systems, new materials are examined within this context. In particular, numerical modeling is increasing in

  14. Reagents and fractions impact on sulphide ore heap bioleaching at Smolnik mine

    Science.gov (United States)

    Oros, L. M.; Zavada, J.

    2017-10-01

    Mine Smolnik is one of the oldest sulphide ore mines in Europe and it is also an important part of bioleaching development. This paper follows previous attempts to extract residual metals from nearby heaps via variations in bioleaching reagents with regard to recent findings and needs in the related industry. Furthermore, economic and process relations between reagents and chosen heap fractions were also investigated in this case study.

  15. Assesment of uranium ore mining impact on the health of occupationally exposed personnel and surrounding communities

    International Nuclear Information System (INIS)

    Ionasu, P.

    2000-01-01

    The working conditions of radioactive ore mining are characterized by atmospheric accumulation of radon and its products generated by alpha decay at the working site. This phenomenon induces a specific pulmonary pathology, named bronchopulmonary carcinoma. Its incidence is associated with radon exposure. This fact is confirmed by the studies performed over a period of 20 years at the mining sites where exploration, exploitation, transport and preparation of radioactive ores were carried out. The frequency of occurrence of bronchopulmonary carcinoma is 4-5 higher to miners working in the uranium mines comparing to the non-working inhabitants in the control area. The people working in radioactive environment, retired people from these activities, as well as the control human population in the areas close to the nuclear units, personnel of non-radioactive mines as well as populations of other areas, without nuclear activities, were medically examined. From the statistical interpretation of the results, the following conclusions have been drawn: incidence of death from respiratory cancer is higher in miners as compared with control population, the average age of the deceased people was lower for miners by about 5 years; occupational in service mean life was 11.3 years in uranium mines, as compared to 16.5 years in non ferrous mines and 15.1 years in coal mines; average latency time was 25 years in case of uranium mine workers, as compared to 27.4 years and 29.2 years in case of non ferrous and coal miners, respectively; cumulate exposure to radon and its descendants was 345 WLM for uranium miners as compared to 66 WLM and 58 WLM in case of non ferrous and coal miners, respectively. Also, the cancer incidence in smokers exposed to radon and its descendant was found to be increased as compared with smokers in control population. Measures for reducing the radiation effects are proposed. (authors)

  16. Surface land ownership and mining; Report on the technical meeting of the Institute for Mining- and Energy Law, Bochum University. Oberflaecheneigentum und Bergbau; Bericht ueber die Fachtagung des Instituts fuer Berg- und Energierecht and der Ruhr-Universitaet Bochum

    Energy Technology Data Exchange (ETDEWEB)

    Stueer, B

    1993-03-01

    Summing up the contents of papers and discussions of the January 1993 meeting in Bochum, which gathered about 130 experts from politics, industry, science, the mining industry, the judiciasy, and the ministerial level of public administration, it can be stated that there is general approval among the experts of the new line of orientation given by the recent court rulings, towards a reassessment of the relationship between the mining industry and surface land ownership, strengthening the protection of third parties. This new approach having been readily adopted in practice, there already are many contracts reflecting the change in the mining industry's conception of itself, and experts wellcomed the turn away from the principle of 'tolerate and liquidate'. (HSCH)

  17. Acid drainage (AD) in nature and environmental impact of acid mine drainage (AMD) in Southern Tuscany

    International Nuclear Information System (INIS)

    Di Lella, Luigi Antonello; Protano, Giuseppe; Riccobono, Francesco

    2005-01-01

    Acid drainage (AD) is a natural process occurring locally at the Earth's surface. It consists in a substantial increase of acidity of surface waters as a result of chemical reactions occurring in the atmosphere (i.e. acid rain) or involving reactive phases (i.e. pyrite) present in the percolated medium. Acidic surface waters (usually pH < 4) can be produced by oxidation of sulphides (mainly pyrite and other iron sulphides) exposed to atmospheric oxygen, while human activities, such as mining, can greatly enhance this process. Acid drainage promoted by mining activities is called acid mine drainage (AMD) and is a primary source of environmental pollution and a world-wide problem in both active and abandoned mining areas. In fact, exposure of iron sulphides to oxidising conditions produces strongly acidic drainage waters rich in sulphate and a variety of heavy elements (i.e. As, Cd, Pb, Sb). Several occurrences of active acid mine drainage have been found in the Metalliferous Hills (southern Tuscany). The most important AMD phenomena were observed in the Fenice Capanne and Niccioleta mining areas

  18. Metal leaching in mine tailings: short-term impact of biochar and wood ash amendments.

    Science.gov (United States)

    Beauchemin, Suzanne; Clemente, Joyce S; MacKinnon, Ted; Tisch, Bryan; Lastra, Rolando; Smith, Derek; Kwong, John

    2015-01-01

    Biochar is perceived as a promising amendment to reclaim degraded, metal-contaminated lands. The objective of this study was to compare the potential of biochar and wood ash amendments to reduce metal(loid) leaching in mine tailings. A 2-mo leaching experiment was conducted in duplicate on acidic and alkaline tailings, each mixed with 5 wt.% of one of the following amendments: three wood-derived, fast-pyrolysis biochars (OC > 57 wt.%) and two wood ash materials (organic carbon [OC] ≤ 16 wt.%); a control test with no carbon input was also added. The columns were leached with water after 1, 2, 4, 8, 16, 32, and 64 d, and the leachates were monitored for dissolved metals, OC, and pH. For the acidic and alkaline tailings, the most significant impact on metal mobility was observed with wood ash materials due to their greater neutralization potential (>15% CaCO eq.) compared with biochar (≤3.3% CaCO eq.). An increase of 1 pH unit in the wood ash-treated alkaline tailings led to an undesirable mobilization of As and Se. The addition of biochar did not significantly reduce the leaching of the main contaminants (Cu and Ni in the acidic tailings and As in the alkaline tailings) over 2 mo. The Se attenuation noted in some biochar-treated acid tailings may be mainly due to a slight alkaline effect rather than Se removal by biochar, given the low capacity for the fresh biochars to retain Se under acidic conditions (pH 4.5). The increased loss of dissolved OC in the biochar-amended systems was of short duration and was not associated with metal(loid) mobilization. Copyright © Her Majesty the Queen in Right of Canada, as represented by the Minister of Agriculture and Agri-Food Canada.

  19. Environmental impacts of rare earth mining and separation based on Eudialyte. A new European way

    International Nuclear Information System (INIS)

    Schreiber, Andrea; Marx, Josefine; Zapp, Petra; Hake, Juergen Friedrich; Vossenkaul, Daniel; Friedrich, Bernd

    2016-01-01

    Neodymium and dysprosium are two rare earth elements (REEs), out of a group of 17 elements with similar chemical properties. Due to their unique properties, REEs gained increasing importance in many new technologies like wind turbines, batteries, lighting, and medical technique. However, the production of REEs requires high material and energy consumption and is associated with considerably environmental burdens e.g. radioactive loaded dust and tailings. Due to the Chinese hegemony regarding REE production and the strong dependency of European industry on Chinese REE exports this paper presents a possible European production chain of REEs based on the mineral Eudialyte found in Norra Karr (Sweden). Because almost 90% of the total mines production of 109,000 t REO equivalents in 2013 [USGS, 2013] occurred in China, the European production is compared to the Chinese route. Bayan Obo is the largest REE deposit in China located near Baotou in Inner Mongolia. Using the Life Cycle Assessment method (LCA), the environmental impacts of both production lines are assessed. Although LCA is a well-known methodology to determine environmental aspects from cradle-to-grave, there are only a few LCA studies available considering REE production, almost all based on process information gathered in the 1990s. This study presents newly estimated data of a possible European Eudialyte based production route collected in a corporate 4-year project together with Siemens AG, RWTH Aachen University and Forschungszentrum Julich. The results for the new European process route show reduced environmental burdens although the total REE content in Eudialyte is much smaller than in the Chinese deposit. Especially, the results for dysprosium from Eudialyte outreach those for Bayan Obo, due to the higher content of heavy rare earth elements (HREEs).

  20. Environmental impacts of rare earth mining and separation based on Eudialyte. A new European way

    Energy Technology Data Exchange (ETDEWEB)

    Schreiber, Andrea; Marx, Josefine; Zapp, Petra; Hake, Juergen Friedrich [Forschungszentrum Juelich (Germany). Inst. of Energy and Climate Research - Systems Analysis and Technology Evaluation (IKE-STE); Vossenkaul, Daniel; Friedrich, Bernd [RWTH Aachen (Germany). Inst. of Process Metallurgy and Metal Recycling

    2016-07-01

    Neodymium and dysprosium are two rare earth elements (REEs), out of a group of 17 elements with similar chemical properties. Due to their unique properties, REEs gained increasing importance in many new technologies like wind turbines, batteries, lighting, and medical technique. However, the production of REEs requires high material and energy consumption and is associated with considerably environmental burdens e.g. radioactive loaded dust and tailings. Due to the Chinese hegemony regarding REE production and the strong dependency of European industry on Chinese REE exports this paper presents a possible European production chain of REEs based on the mineral Eudialyte found in Norra Karr (Sweden). Because almost 90% of the total mines production of 109,000 t REO equivalents in 2013 [USGS, 2013] occurred in China, the European production is compared to the Chinese route. Bayan Obo is the largest REE deposit in China located near Baotou in Inner Mongolia. Using the Life Cycle Assessment method (LCA), the environmental impacts of both production lines are assessed. Although LCA is a well-known methodology to determine environmental aspects from cradle-to-grave, there are only a few LCA studies available considering REE production, almost all based on process information gathered in the 1990s. This study presents newly estimated data of a possible European Eudialyte based production route collected in a corporate 4-year project together with Siemens AG, RWTH Aachen University and Forschungszentrum Julich. The results for the new European process route show reduced environmental burdens although the total REE content in Eudialyte is much smaller than in the Chinese deposit. Especially, the results for dysprosium from Eudialyte outreach those for Bayan Obo, due to the higher content of heavy rare earth elements (HREEs).

  1. Impact of Mining Activity upon Environment in Roşia Montană

    Directory of Open Access Journals (Sweden)

    SIGISMUND DUMA

    2008-01-01

    Full Text Available Roşia Montană is the greatest gold ore in Romania and one of the greatest in Europe, and its exploitation has been carried out since Antiquity up to nowadays. If the traditional extraction and processing technologies had a minimal impact upon environment, the ones adopted in modern times have affected all the components of the natural environment. In the perspective of capitalizing the gold ore through the programme elaborated by the Canadian company, Gold Corporation, the zonal geographical space will be degraded up to the level of industrial dessert over an area of 100 km2 and in case of damage, the affected area can extend enormously. The environmental problems are related both to the specific nature of such an industrial activity and, especially, to the use of enormous quantities of sodium cyanide directly on the preparation flux from the industrial plant. Few such cases are known worldwide, in several economically less developed countries. Usually, cyanides are used for treating the gold concentrations, operation done in conditions of maximum security, in closed spaces, situated in isolated zones and the neutralization (detoxification of cyanides is done in situ. The treatment of cyanides in open spaces has always generated environmental problems. Moreover, none of the cyanide treatment technologies eliminates entirely their toxic effect (less toxic chemical products are obtained. In order to avoid the production of an environmental disaster and to preserve the local patrimony values (in this place there lies the richest mining archeological site in Europe, we elaborated several recommendations we consider feasible as they allow both the capitalization of ore, which is a socio-economic necessity of the area, and the ecological reconstruction of the affected geographical space.

  2. Mine waste management

    International Nuclear Information System (INIS)

    Hutchinson, I.P.G.; Ellison, R.D.

    1992-01-01

    This book reports on mine waste management. Topics covered include: Performance review of modern mine waste management units; Mine waste management requirements; Prediction of acid generation potential; Attenuation of chemical constituents; Climatic considerations; Liner system design; Closure requirements; Heap leaching; Ground water monitoring; and Economic impact evaluation

  3. Applying foraminiferal stratigraphy as a biomarker for heavy metal contamination and mining impact in a fiord in West Greenland.

    Science.gov (United States)

    Elberling, Bo; Knudsen, Karen Luise; Kristensen, Peter H; Asmund, Gert

    2003-04-01

    Sulphidic mine waste disposed in marine environments constitutes an environmental risk to aquatic life due to potential uptake and accumulation of heavy metals in biota. Fiord sediments near the former Black Angel Mine in West Greenland are contaminated by lead and zinc as a result of submarine tailings disposal in 1973-1990. In 1999 cores were taken up to 10 km away from the disposal area. Analyses include heavy metals, radiochemical dating (210Pb) and high-resolution foraminiferal stratigraphy. The mining operation resulted in significant changes in the assemblage composition. In addition, up to 20% of the Melonis barleeanus population found in sediment deposited during nearby tailings disposal was deformed compared to a natural background of less than 5%. Throughout cores representing the last 100 years of sedimentation, the total numbers and frequency of morphological abnormalities among M. barleeanus revealed some correlation with heavy metals concentrations (up to r2 = 79%). We conclude that abnormalities among foraminifera may represent a useful biomarker for evaluating trends in the biological impact resulting of submarine tailings disposal as well as long-term environmental impact and subsequent recovery.

  4. Environmental impacts of unmanaged solid waste at a former base metal mining and ore processing site (Kirki, Greece).

    Science.gov (United States)

    Liakopoulos, Alexandros; Lemière, Bruno; Michael, Konstantinos; Crouzet, Catherine; Laperche, Valérie; Romaidis, Ioannis; Drougas, Iakovos; Lassin, Arnault

    2010-11-01

    The Kirki project aimed to identify, among the mining waste abandoned at a mine and processing plant, the most critical potential pollution sources, the exposed milieus and the main pathways for contamination of a littoral area. This was accompanied by the definition of a monitoring network and remedial options. For this purpose, field analytical methods were extensively used to allow a more precise identification of the source, to draw relevant conceptual models and outline a monitoring network. Data interpretation was based on temporal series and on a geographical model. A classification method for mining waste was established, based on data on pollutant contents and emissions, and their long-term pollution potential. Mining waste present at the Kirki mine and plant sites comprises (A) extraction waste, mainly metal sulfide-rich rocks; (B) processing waste, mainly tailings, with iron and sulfides, sulfates or other species, plus residues of processing reagents; and (C) other waste, comprising leftover processing reagents and Pb-Zn concentrates. Critical toxic species include cadmium and cyanide. The stormy rainfall regime and hilly topography favour the flush release of large amounts of pollutants. The potential impacts and remedial options vary greatly. Type C waste may generate immediate and severe chemical hazards, and should be dealt with urgently by careful removal, as it is localised in a few spots. Type B waste has significant acid mine drainage potential and contains significant amounts of bioavailable heavy metals and metalloids, but they may also be released in solid form into the surface water through dam failure. The most urgent action is thus dams consolidation. Type A waste is by far the most bulky, and it cannot be economically removed. Unfortunately, it is also the most prone to acid mine drainage (seepage pH 1 to 2). This requires neutralisation to prevent acid water accelerating heavy metals and metalloids transfer. All waste management options

  5. A top-down / bottom-up approach for multi-actors and multi-criteria assessment of mining projects for sustainable development. Application on Arlit Uranium mines (Niger); Une demarche Top-Down / Bottom-Up pour l'evaluation en termes multicriteres et multi-acteurs des projets miniers dans l'optique du developpement durable. Application sur les mines d'Uranium d'Arlit (Niger)

    Energy Technology Data Exchange (ETDEWEB)

    Chamaret, A

    2007-06-15

    This thesis aims to appraise the relevance of using an hybrid top-down / bottom-up approach to evaluate mining projects in the perspective of sustainable development. With the advent of corporate social responsibility and sustainable development concepts, new social expectations have appeared towards companies that go beyond a sole requirement of profit earning capacity. If companies do not answer to these expectations, they risk to lose their social legitimacy. Traditionally associated with social, environmental, economical and political impacts and risks, mining activity is particularly concerned by these new issues. Whereas mineral resources needs have never been so high, mining companies are now expected to limit their negative effects and to take into account their different audiences' expectations in order to define, together, the terms of their social license to operate. Considering the diversity of issues, scales, actors and contexts, the challenge is real and necessitates tools to better understand issues and to structure dialogues. Based on the Uranium mines of Arlit (Niger) case study, this work shows that associating participatory approaches to structuration tools and literature propositions, appears as an efficient formula to better organize issues diversity and to build a structured dialogue between mining companies and their stakeholders. First Part aims to present the theoretical, institutional and sectorial contexts of the thesis. Second Part exposes work and results of the evaluation carried out in Niger. And, Third Part, shows the conclusions that can be derived from this work and presents a proposal for an evaluation framework, potentially applicable to other mining sites. (author)

  6. Environmental analysis report for the proposed development of a wind turbine array near the town of Thetford Mines and the municipalities of Saint-Jean-de-Brebeuf and Kinnear's Mills by Energie Eolienne Des Moulins S.E.C.; Rapport d'analyse environnementale pour le projet d'amenagement du parc eolien Des Moulins sur le territoire de la ville de Thetford Mines ainsi que des municipalites de Saint-Jean-de-Brebeuf et de Kinnear's Mills par Energie Eolienne Des Moulins S.E.C.

    Energy Technology Data Exchange (ETDEWEB)

    Dupont, C.; Theberge, M.C. [Quebec Ministere du Developpement durable, de l' Environnement et des Parcs, Quebec, PQ (Canada). Direction des evaluations environnementales, Services des projets en milieu terrestre

    2010-10-06

    Energie Eolienne Des Moulins S.E.C. has responded to Hydro-Quebec's call for tenders to construct a wind turbine array in the Chaudiere Appalache area, north of Thetford Mines to meet the future energy needs of the region. This document described the reasons for the project and provided a general description of the project. The company will install 78 wind turbines, of which 75 are 2 MW and 3 are 2.3 MW for a total capacity of 156.9 MW. This project requires a certificate of authorization from the provincial government and must undergo an environmental assessment. As part of the process, public inquiries were held in September and October 2009 to consult with stakeholders, project proponents and those opposed to the project. The main challenges facing the project include concerns by local residents regarding the local economy, visual aesthetics of the project, noise pollution, and hazards for birds and bats. This document also covered other considerations, such as drinking water sources; public security and emergency procedures; telecommunications; electromagnetic interference; shadow effect; eco-tourism; waste management; dust and particulates; forest management; endangered plant species; soil management; wetlands; surface waters; aquatic ecosystems; and deer. Upon review of all these considerations, a follow-up committee at the Quebec Ministry of Sustainable Development, Environment and Parks decided that the project is justifiable and acceptable from an environmental point of view and has recommended that the project proceed. 47 refs., 3 tabs., 3 figs., 4 appendices.

  7. Assessment of the safety factor of the new EC-specified test gas for intrinsically safe electric circuits of mining equipment; Ermittlung des Sicherheitsfaktors des neuen in der EG festgelegten Pruefgases fuer eigensichere Stromkreise von Bergbau-Betriebsmitteln

    Energy Technology Data Exchange (ETDEWEB)

    Hauke, R. [Fachstelle fuer Sicherheit Elektrischer Betriebsmittel, Dortmund (Germany). Bergbauversuchsstrecke

    2001-07-01

    The real safety factor of the new gas (52 % by volume H{sub '}'/air mixture) was compared to the earlier gas mixture (ethylene) for group I (methane) was investigated. Further, it was investigated whether more or less intrinsically safe systems can be connected to a single supply source. Extensive experiments were carried out in two test sites, supplemented by evaluations of earlier BVS experiments and a literature search. [German] Im Rahmen des Vorhabens sollte die Hoehe des realen Sicherheitsfaktors der neuen Wasserstoffmischung (52 Vol.-% H{sub 2}/Luft-Gemisch) im Vergleich zu der frueher verwandten Pruefgasmischung (Ethylen) fuer die Gruppe I (Methan) untersucht werden. Ebenfalls sollte eine Antwort auf die Frage gesucht werden, ob das neue Pruefgasgemisch eine Erleichterung fuer die Bescheinigungspraxis von eigensicheren Systemen fuer den Steinkohlenbergbau mit sich bringt (mehr Verbraucher an eine speisende Quelle moeglich) oder ob eine Beschraenkung (wesentlich weniger Verbraucher an eine speisende Quelle) zu erwarten ist. Beide Fragestellungen konnte durch ein umfangreiches Versuchsprogramm, das an zwei aufgebauten Pruefplaetzen innerhalb der verlaengerten Projektlaufzeit durchgefuehrt wurde, in Verbindung mit der Neuauswertung aelterer Versuche der BVS und der recherchierten Literatur beantwortet werden. (orig.)

  8. Synoptic monitoring as an approach to discriminating between point and diffuse source contributions to zinc loads in mining impacted catchments.

    Science.gov (United States)

    Banks, V J; Palumbo-Roe, B

    2010-09-01

    One of the global legacies of industrialisation is the environmental impacts of historic mineral exploitation. Recent national initiatives to manage the impacts on ground and surface waters have driven the need to develop better techniques for assessing understanding of the catchment-scale distribution and characterisation of the relative contribution of point and diffuse contaminant sources. The benefits of a detailed, multidisciplinary investigation are highlighted through a case study focused on the Rookhope Burn, a tributary of the River Wear, which falls within a significantly mine impacted area of the North Pennines Orefield, UK. Zinc (Zn) has been identified as the contaminant of concern within this catchment, which is judged by the Environment Agency to be at risk of failing to achieve good water quality status in the context of the Water Framework Directive. The results of synoptic flow monitoring and sampling for chemical determinations of major and trace elements have been used to calculate mass balances of instream and inflow chemical loads in the Rookhope Burn. Despite a dominant impact on the water quality from a mine outburst (especially Zn [1.45 to 2.42 mg/l], Fe [2.18 to 3.97 mg/l], Mn [3.69 to 6.77 mg/l], F [3.99 to 4.80 mg/l] and SO(4) [178 to 299 mg/l]), mass balance calculations combined with geological mapping have facilitated the identification of significant, previously unknown, subsurface contributions of Zn contaminated groundwater (with Zn concentrations in excess of 0.4 to 0.9 mg/l and 0.18 to 0.36 mg/l) to the Burn. The subsurface contributions exhibit spatial correspondence to mine workings with associated mineral veins and adits, or to points of suspected karst groundwater resurgence. These findings reiterate the challenges posed in decision making with respect to remediation, in this case in the context of the management of significant subsurface contributions.

  9. Technogenic waterflows generated by oil shale mining: impact on Purtse catchment rivers

    International Nuclear Information System (INIS)

    Raetsep, A.; Liblik, V.

    2000-01-01

    The correlation between natural (meteorological, hydrological) and technogenic (mining-technological, hydrogeological, hydrochemical) factors caused by oil shale mining in the Purtse catchment region in northeastern Estonia during 1990-1998 has been studied. As a result of a complex effect of these factors (correlation coefficients r = 0. 60-0.86), a so-called hydrogeological circulation of water has been formed in the catchment area. It totals 25-40 % from the whole amount of mine water pumped out at the present, but in the near future it will reach even up to 50-55 %. On the ground of average data, a conceptual balance scheme of water circulation (cycles) for the Purtse catchment landscape has been worked out. It shows that under the influence of technogenic waterflows a new, anthropogenic biogeochemical matter cycling from geological environment into hydrological one has been formed in this catchment area. Transition of the macro- and microelements existing in the composition of oil shale into the aqueous solution and their distribution in mine water are in a good harmony with the so-called arrangement of the elements by the electrode potentials. The technogenic hydrochemical conditions arising in the catchment rivers will not disappear even after finishing oil shale mining. (author)

  10. Environmental impact of active and abandoned mines and metal smelters in Slovenia

    Directory of Open Access Journals (Sweden)

    Tomaž Budkovič

    2003-06-01

    Full Text Available Slovenia has long been known for its numerous mines and ore processing. From the times of the Roman Empire to now, 49 mines and open pits were opened, four of them were large (Idrija, Mežica – Topla, Litija and Žirovski vrh. There were also 25 oreprocessing plants and smelters, which were operating mostly in the vicinity of larger mines (Idrija, Žerjav, Celje. Due to the lack of written sources, we probably haven succeeded in making a complete list of them. There were 33 iron works operating in the vicinity ofmines and open pits, three large ones have further developed and are still operating (Jesenice, Ravne na Koroškem and Štore. As the ore processing capacities have far exceeded the capacities of the Slovenian mining, ore has long been imported and only processed in Slovenia. On the basis of the results of our investigations in the vicinity of larger mines and smelters we estimated that in Slovenia the areas in which critical limit for heavy metal content is exceeded sums up to about 80 km2.

  11. Rare Earth Elements: Overview of Mining, Mineralogy, Uses, Sustainability and Environmental Impact

    Directory of Open Access Journals (Sweden)

    Nawshad Haque

    2014-10-01

    Full Text Available Rare earths are used in the renewable energy technologies such as wind turbines, batteries, catalysts and electric cars. Current mining, processing and sustainability aspects have been described in this paper. Rare earth availability is undergoing a temporary decline due mainly to quotas being imposed by the Chinese government on export and action taken against illegal mining operations. The reduction in availability coupled with increasing demand has led to increased prices for rare earths. Although the prices have come down recently, this situation is likely to be volatile until material becomes available from new sources or formerly closed mines are reopened. Although the number of identified deposits in the world is close to a thousand, there are only a handful of actual operating mines. Prominent currently operating mines are Bayan Obo in China, Mountain Pass in the US and recently opened Mount Weld in Australia. The major contributor to the total greenhouse gas (GHG footprint of rare earth processing is hydrochloric acid (ca. 38%, followed by steam use (32% and electricity (12%. Life cycle based water and energy consumption is significantly higher compared with other metals.

  12. Environmental impacts associated with an abandoned mine in the Witbank Coalfield, South Africa

    International Nuclear Information System (INIS)

    Bell, F.G.; Bullock, S.E.T.; Haelbich, T.F.J.; Lindsay, P.

    2001-01-01

    Mining at Middelburg Colliery in the Witbank Coalfield commenced at the turn of the last century. Initially, there was little environmental degradation associated with mining activities; however, in the late 1930s, a pillar-robbing programme commenced. This has had a marked effect on the environment. Some of the most notable primary effects include subsidence, the appearance of tension cracks at the surface and crownhole development. Secondary effects include spontaneous combustion of the coal worked, as air has been provided with ready access to the mine, accelerated subsidence due to the strength of many pillars being reduced by burning, and a marked deterioration of groundwater quality in the area due to the seepage of acid mine drainage from the mine. Spoil heaps also form blemishes on the landscape. These contain significant amounts of coal and have undergone spontaneous combustion. The deterioration in the quality of water has led to the decimation of vegetation in some areas and the eradication of aquatic flora and fauna in a nearby stream

  13. Mine dewatering and impact assessment in an arid area: Case of Gulf region.

    Science.gov (United States)

    Yihdego, Yohannes; Drury, Len

    2016-11-01

    Analytical and empirical solution coupled with water balance method were used to predict the ground water inflow to a mine pit excavated below the water table, final pit lake level/recovery and radius of influence, through long-term and time variant simulations. The solution considers the effect of decreased saturated thickness near the pit walls, distributed recharge to the water table and upward flow through the pit bottom. The approach is flexible to accommodate the anisotropy/heterogeneity of the real world. Final pit void water level was assessed through scenarios to know whether it will be consumed by evaporation and a shallow lake will form or not. The optimised radius of influence was estimated which is considered as crucial information in relation to the engineering aspects of mine planning and sustainable development of the mine area. Time-transient inflow over a period of time was estimated using solutions, including analytical element method (AEM). Their primary value is in providing estimates of pit inflow rates to be used in the mine dewatering. Inflow estimation and recovery helps whether there is water to supplement the demand and if there is any recovery issue to be dealt with in relation to surface and groundwater quality/eco-system, environmental evaluations and mitigation. Therefore, this method is good at informing decision makers in assessing the effects of mining operations and developing an appropriate water management strategy.

  14. Des dispositions responsables à prendre pour la protection des ...

    African Journals Online (AJOL)

    En considérant l'effet néfaste des maladies, des parasites, du changement climatique et d'autres facteurs environnementaux (les OGM par exemple) sur la survie des abeilles, la baisse de leurs populations dans certaines parties du monde ne saurait être attribuée aux seules pesticides. En plus, l'impact de ces derniers sur ...

  15. Animal husbandry and landscape management in mining landscapes. Literature survey and analysis for the region south of Leipzig; Tiergebundene Landnutzung und Landschaftspflege in Bergbaufolgelandschaften. Literaturuebersicht und Bewertung am Beispiel des Suedraumes Leipzig

    Energy Technology Data Exchange (ETDEWEB)

    Eichler, S.

    1999-07-01

    Scientific research on animal husbandry in surface mining regions has started about a decade ago and preliminary results are now available. These regions include large surfaces, the future utilisation of which is still uncertain and which have a particular potential for nature protection. The project presented here analysed options for the utilisation and maintenance of the surface mining regions with a particular emphasis on domestic animals and game farming. The 600 sqkm mining region of Leipzig south (western Saxony) was chosen as a test region. The investigations were based on exhaustive bibliographic research, the analysis of statistical data and expert interviews. Animal husbandry can be part of a comprehensive concept for the ecological revitalisation of surface mining regions. They contain large areas with a high potential for nature protection which should be maintained and developed accordingly. Domestic animals can contribute to the management of nature protection sites on dumping areas by maintaining the vegetation at intermediate stages of succession where selected biotopes or species are to be conserved. Ruminants are important also for the management of reclaimed agricultural land which is used as grassland in order to preserve it for future agricultural use. Landscape management with herbivores is also an option for slopes of pits. The availability of sufficient feed is the limiting factor for animal husbandry on those areas and determines the pasturing systems to be chosen. (orig). [German] Mit wissenschaftlichen Arbeiten zur Tierhaltung auf Bergbaufolgeflaechen wurde begonnen, und es liegen erste Forschungsergebnisse vor. Die Bergbaufolgelandschaft umfasst grosse Flaechen, deren Folgenutzung unsicher ist bzw. deren Naturschutzpotential besonders hervorgehoben wird. Das Ziel des Projektes bestand in der Analyse charakteristischer Nutzungs- und Pflegevarianten fuer Bergbaufolgelandschaften unter Beruecksichtigung von Nutz- und Wildtierhaltung. Als

  16. Environmental impact of brown coal mining in Sokolovo basin with attention to the heavy metal mobility

    International Nuclear Information System (INIS)

    Sebestova, E.; Machovic, V.; Pavlikova, H.; Lelak, J.; Minarik, L.

    1996-01-01

    Over 50% of electrical energy in the Czech Republic is produced at power plants burning brown coal. The main sources of this coal are situated in the North Bohemian and Sokolovo basins, part of the most polluted territory in middle Europe, the so called 'Black Triangle'. The coal deposits here are mined by opencast method sup to 150 m depth. The area occupied by the mines amounts to about 260 km 2 . A detailed study on heavy metal contamination in the area of the Lomnice open mine in the Sokolovo district was conducted. Special attention was devoted to the migration of the pollutants from the waste water dump. The content of metals was analysed in soil, water and plant material in the area surrounding the waste water dump. The role of this local source of pollution in the overall contamination of the environment is discussed. 3 refs., 2 figs., 5 tabs

  17. Mining wastes

    International Nuclear Information System (INIS)

    Pradel, J.

    1981-01-01

    In this article mining wastes means wastes obtained during extraction and processing of uranium ores including production of uraniferous concentrates. The hazards for the population are irradiation, ingestion, dust or radon inhalation. The different wastes produced are reviewed. Management of liquid effluents, water treatment, contamined materials, gaseous wastes and tailings are examined. Environmental impact of wastes during and after exploitation is discussed. Monitoring and measurements are made to verify that ICRP recommendations are met. Studies in progress to improve mining waste management are given [fr

  18. Trace elements and Pb isotopes in soils and sediments impacted by uranium mining

    Energy Technology Data Exchange (ETDEWEB)

    Cuvier, A., E-mail: alicia.cuvier@hotmail.fr [ECOLAB, Université de Toulouse, CNRS, INPT, UPS, Toulouse (France); IRSN/PRP-ENV/SESURE/Laboratoire d' études radioécologiques en milieu continental et marin, BP 1, 13108 Saint Paul Lez Durance Cedex (France); Pourcelot, L. [IRSN/PRP-ENV/SESURE/Laboratoire d' études radioécologiques en milieu continental et marin, BP 1, 13108 Saint Paul Lez Durance Cedex (France); Probst, A. [ECOLAB, Université de Toulouse, CNRS, INPT, UPS, Toulouse (France); Prunier, J. [Observatoire Midi-Pyrénées, laboratoire Géosciences Environnement Toulouse, CNRS/IRD/Université Paul Sabatier, 14 avenue Edouard Belin, 31400 Toulouse (France); Le Roux, G., E-mail: gael.leroux@ensat.fr [ECOLAB, Université de Toulouse, CNRS, INPT, UPS, Toulouse (France)

    2016-10-01

    The purpose of this study is to evaluate the contamination in As, Ba, Co, Cu, Mn, Ni, Sr, V, Zn and REE, in a high uranium activity (up to 21,000 Bq ∙ kg{sup −1}) area, downstream of a former uranium mine. Different geochemical proxies like enrichment factor and fractions from a sequential extraction procedure are used to evaluate the level of contamination, the mobility and the availability of the potential contaminants. Pb isotope ratios are determined in the total samples and in the sequential leachates to identify the sources of the contaminants and to determine the mobility of radiogenic Pb in the context of uranium mining. In spite of the large uranium contamination measured in the soils and the sediments (EF ≫ 40), trace element contamination is low to moderate (2 < EF < 5), except for Ba (5 < EF < 15), due to the precipitation of barium sulfate resulting from mining activities. Most of the trace elements are associated with the most mobile fractions of the sediments/soils, implying an enhanced potential availability. Even if no Pb enrichment is highlighted, the Pb isotopic signature of the contaminated soils is strongly radiogenic. Measurements performed on the sequential leachates reveal inputs of radiogenic Pb in the most mobile fractions of the contaminated soil. Inputs of low-mobile radiogenic Pb from mining activities may also contribute to the Pb signature recorded in the residual phase of the contaminated samples. We demonstrate that Pb isotopes are efficient tools to trace the origin and the mobility of the contaminants in environments affected by uranium mining. - Highlights: • Contamination of soils is evidenced by a multiproxy approach. • Enrichment factors highlight a low contamination except for U, S and Ba. • Pb isotope ratios point out inputs of radiogenic Pb from the mine. • Radiogenic Pb is mainly in the acid-soluble and the reducible fractions.

  19. Potential climate change impacts on water availability and cooling water demand in the Lusatian Lignite Mining Region, Central Europe

    Science.gov (United States)

    Pohle, Ina; Koch, Hagen; Gädeke, Anne; Grünewald, Uwe; Kaltofen, Michael; Redetzky, Michael

    2014-05-01

    In the catchments of the rivers Schwarze Elster, Spree and Lusatian Neisse, hydrologic and socioeconomic systems are coupled via a complex water management system in which water users, reservoirs and water transfers are included. Lignite mining and electricity production are major water users in the region: To allow for open pit lignite mining, ground water is depleted and released into the river system while cooling water is used in the thermal power plants. In order to assess potential climate change impacts on water availability in the catchments as well as on the water demand of the thermal power plants, a climate change impact assessment was performed using the hydrological model SWIM and the long term water management model WBalMo. The potential impacts of climate change were considered by using three regional climate change scenarios of the statistical regional climate model STAR assuming a further temperature increase of 0, 2 or 3 K by the year 2050 in the region respectively. Furthermore, scenarios assuming decreasing mining activities in terms of a decreasing groundwater depression cone, lower mining water discharges, and reduced cooling water demand of the thermal power plants are considered. In the standard version of the WBalMo model cooling water demand is considered as static with regard to climate variables. However, changes in the future cooling water demand over time according to the plans of the local mining and power plant operator are considered. In order to account for climate change impacts on the cooling water demand of the thermal power plants, a dynamical approach for calculating water demand was implemented in WBalMo. As this approach is based on air temperature and air humidity, the projected air temperature and air humidity of the climate scenarios at the locations of the power plants are included in the calculation. Due to increasing temperature and decreasing precipitation declining natural and managed discharges, and hence a lower

  20. Impact on sediments and water by release of copper from chalcopyrite bearing rock due to acidic mine drainage

    Science.gov (United States)

    Shukla, Anoop Kant; Pradhan, Manoj; Tiwari, Onkar Nath

    2018-04-01

    Mining activity causes transition of rock-mass from its original position in earth into open environment. The action of environmental elements such air, water, microorganisms leads to oxidation of minerals which constitute the rock. The oxidation of sulphide minerals in presence of moisture releases acidic mine discharge (AMD). The acidic nature of AMD causes leaching of metals from rock minerals. Dissolution of other minerals may occur upon reaction with AMD. Chalcopyrite (CuFeS2) undergoes oxidation in acidic condition releasing copper among other products. This study reveals contamination of copper in sediment samples and seepage water from the tailing dam of a large copper project in located in central India. Elevation was studied using GIS to ascertain to the topographic elevation of tailing dam area. It was located at relatively high altitude causing seepage to flow away from tailing dam. The seepage water from tailing dam was found to be acidic with mean pH value of 4.0 and elevated copper content. Similarly, sediments from seepage water flow displayed elevated copper concentration. The copper concentration in seepage water was found with a mean value of 10.73 mg/l. The sediments from seepage water flow also displayed elevated copper concentration with mean value of 26.92 g/kg. This indicates impact on sediments by release of copper due to acidic mine drainage.

  1. Long-term ongoing impact of arsenic contamination on the environmental compartments of a former mining-metallurgy area.

    Science.gov (United States)

    González-Fernández, B; Rodríguez-Valdés, E; Boente, C; Menéndez-Casares, E; Fernández-Braña, A; Gallego, J R

    2018-01-01

    Arsenic and mercury are potentially toxic elements of concern for soil, surficial and ground waters, and sediments. In this work various geochemical and hydrogeological tools were used to study a paradigmatic case of the combined effects of the abandonment of Hg- and As-rich waste on these environmental compartments. Continuous weathering of over 40years has promoted As and Hg soil pollution (thousands of ppm) in the surroundings of a former Hg mining-metallurgy site and affected the water quality of a nearby river and shallow groundwater. In particular, the high availability of As both in soils and waste was identified as one of the main determinants of contaminant distribution, whereas the impact of Hg was found to be minor, which is explained by lower mobility. Furthermore, potential additional sources of pollution (coal mining, high natural backgrounds, etc.) discharging into the study river were revealed less significant than the contaminants generated in the Hg-mining area. The transport and deposition of pollutants within the water cycle has also affected several kilometres downstream of the release areas and the chemistry of stream sediments. Overall, the environmental compartments studies held considerable concentrations of Hg and As, as remarkably revealed by the average contaminant load released in the river (several tons of As per year) and the accumulation of toxic elements in sediments (enrichment factors of As and Hg above 35). Copyright © 2017 Elsevier B.V. All rights reserved.

  2. Uranium and Associated Heavy Metals in Ovis aries in a Mining Impacted Area in Northwestern New Mexico.

    Science.gov (United States)

    Samuel-Nakamura, Christine; Robbins, Wendie A; Hodge, Felicia S

    2017-07-28

    The objective of this study was to determine uranium (U) and other heavy metal (HM) concentrations (As, Cd, Pb, Mo, and Se) in tissue samples collected from sheep ( Ovis aries ), the primary meat staple on the Navajo reservation in northwestern New Mexico. The study setting was a prime target of U mining, where more than 1100 unreclaimed abandoned U mines and structures remain. The forage and water sources for the sheep in this study were located within 3.2 km of abandoned U mines and structures. Tissue samples from sheep ( n = 3), their local forage grasses ( n = 24), soil ( n = 24), and drinking water ( n = 14) sources were collected. The samples were analyzed using Inductively Coupled Plasma-Mass Spectrometry. Results: In general, HMs concentrated more in the roots of forage compared to the above ground parts. The sheep forage samples fell below the National Research Council maximum tolerable concentration (5 mg/kg). The bioaccumulation factor ratio was >1 in several forage samples, ranging from 1.12 to 16.86 for Mo, Cd, and Se. The study findings showed that the concentrations of HMs were greatest in the liver and kidneys. Of the calculated human intake, Se Reference Dietary Intake and Mo Recommended Dietary Allowance were exceeded, but the tolerable upper limits for both were not exceeded. Food intake recommendations informed by research are needed for individuals especially those that may be more sensitive to HMs. Further study with larger sample sizes is needed to explore other impacted communities across the reservation.

  3. The long-term environmental impacts of the Mount Polley mine tailings spill, British Columbia, Canada

    Science.gov (United States)

    Byrne, Patrick; Hudson-Edwards, Karen; Macklin, Mark; Brewer, Paul; Bird, Graham; Williams, Richard

    2015-04-01

    On the 4th August 2014 a tailings impoundment failure at the Mount Polley gold and copper mine in British Columbia, Canada, released approximately 25 million m3 of solid and liquid waste into Hazeltine Creek, Quesnel Lake and Polley Lake. The sheer volume of the tailings released caused Haseltine Creek channel to expand from 2m to over 25m in width and Polley Lake water level to rise by 1.7m. The spill also removed trees in a 900 km2 corridor either side of Hazeltine Creek. Local residents and government officials have expressed serious concerns regarding the potential long-term effects on regional biodiversity, water security and to the livelihoods of First Nation communities. Among impoundment failures, the Mount Polley disaster is unique in that the solid tailings contain an unusual mixture of metal contaminants (arsenic, copper, gold, manganese, nickel, lead, vanadium). As particulate matter is the principal carrier of metal contaminants, the spilled tailings may reside in the regional soils and sediments for 1000s of years serving as a secondary source of pollution. The environmental risk posed by the spilled tailings is compounded by the location of the spill in a mountainous forested catchment, affected by severe winters with prominent spring snow melts that have the potential to remobilise very large quantities of spilled tailings. No data currently exist on the short- to long-term behaviour of these tailings in soils and sediments and the effects of the clean-up operations on their behaviour in this type of river environment. In this study, we adopt a multidisciplinary approach to determine the environmental and geomorphological impacts of the tailings spill. We have two specific objectives. (1) The physicochemical speciation and geochemical stability of spilled tailings will be characterised in surface and hyporheic sediments using bulk chemistry, mineralogical (XRD and SEM) and speciation methods (sequential extractions, electron microprobe analysis, XAS

  4. Harnessing opportunities for good governance of health impacts of mining projects in Mongolia: results of a global partnership.

    Science.gov (United States)

    Pfeiffer, Michaela; Vanya, Delgermaa; Davison, Colleen; Lkhagvasuren, Oyunaa; Johnston, Lesley; Janes, Craig R

    2017-06-27

    The Sustainable Development Goals call for the effective governance of shared natural resources in ways that support inclusive growth, safeguard the integrity of the natural and physical environment, and promote health and well-being for all. For large-scale resource extraction projects -- e.g. in the mining sector -- environmental regulations and in particular environmental impact assessments (EIA) provide an important but insufficiently developed avenue to ensure that wider sustainable development issues, such as health, have been considered prior to the permitting of projects. In recognition of the opportunity provided in EIA to influence the extent to which health issues would be addressed in the design and delivery of mining projects, an international and intersectoral partnership, with the support of WHO and public funds from Canadian sources, engaged over a period of six years in a series of capacity development activities and knowledge translation/dissemination events aimed at influencing policy change in the extractives sector so as to include consideration of human health impacts. Early efforts significantly increased awareness of the need to include health considerations in EIAs. Coupling effective knowledge translation about health in EIA with the development of networks that fostered good intersectoral partnerships, this awareness supported the development and implementation of key pieces of legislation. These results show that intersectoral collaboration is essential, and must be supported by an effective conceptual understanding about which methods and models of impact assessment, particularly for health, lend themselves to integration within EIA. The results of our partnership demonstrate that when specific conditions are met, integrating health into the EIA system represents a promising avenue to ensure that mining activities contribute to wider sustainable development goals and objectives.

  5. Potential impacts to perennial springs from tar sand mining, processing, and disposal on the Tavaputs Plateau, Utah, USA

    International Nuclear Information System (INIS)

    Johnson, William P.; Frederick, Logan E.; Millington, Mallory R.; Vala, David; Reese, Barbara K.; Freedman, Dina R.; Stenten, Christina J.; Trauscht, Jacob S.; Tingey, Christopher E.; Kip Solomon, D.; Fernandez, Diego P.; Bowen, Gabriel J.

    2015-01-01

    Similar to fracking, the development of tar sand mining in the U.S. has moved faster than understanding of potential water quality impacts. Potential water quality impacts of tar sand mining, processing, and disposal to springs in canyons incised approximately 200 m into the Tavaputs Plateau, at the Uinta Basin southern rim, Utah, USA, were evaluated by hydrogeochemical sampling to determine potential sources of recharge, and chemical thermodynamic estimations to determine potential changes in transfer of bitumen compounds to water. Because the ridgetops in an area of the Tavaputs Plateau named PR Spring are starting to be developed for their tar sand resource, there is concern for potential hydrologic connection between these ridgetops and perennial springs in adjacent canyons on which depend ranching families, livestock, wildlife and recreationalists. Samples were collected from perennial springs to examine possible progression with elevation of parameters such as temperature, specific conductance, pH, dissolved oxygen, isotopic tracers of phase change, water-rock interaction, and age since recharge. The groundwater age dates indicate that the springs are recharged locally. The progression of hydrogeochemical parameters with elevation, in combination with the relatively short groundwater residence times, indicate that the recharge zone for these springs includes the surrounding ridges, and thereby suggests a hydrologic connection between the mining, processing, disposal area and the springs. Estimations based on chemical thermodynamic approaches indicate that bitumen compounds will have greatly enhanced solubility in water that comes into contact with the residual bitumen–solvent mixture in disposed tailings relative to water that currently comes into contact with natural tar. - Highlights: • The potential water quality impacts of the first US tar sand development are considered. • Analyses of perennial springs in adjacent canyons indicate hydrologic

  6. Potential impacts to perennial springs from tar sand mining, processing, and disposal on the Tavaputs Plateau, Utah, USA

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, William P.; Frederick, Logan E.; Millington, Mallory R. [University of Utah, Department of Geology & Geophysics, Salt lake City, UT 84112 (United States); Vala, David [Murray High School, Murray, UT 84107 (United States); Reese, Barbara K. [Butler Middle School, Cottonwood Heights, UT 84121 (United States); Freedman, Dina R. [Hillside Middle School, Salt Lake City, UT 84108 (United States); Stenten, Christina J. [Draper Park Middle School, Draper, UT 84020 (United States); Trauscht, Jacob S.; Tingey, Christopher E.; Kip Solomon, D.; Fernandez, Diego P.; Bowen, Gabriel J. [University of Utah, Department of Geology & Geophysics, Salt lake City, UT 84112 (United States)

    2015-11-01

    Similar to fracking, the development of tar sand mining in the U.S. has moved faster than understanding of potential water quality impacts. Potential water quality impacts of tar sand mining, processing, and disposal to springs in canyons incised approximately 200 m into the Tavaputs Plateau, at the Uinta Basin southern rim, Utah, USA, were evaluated by hydrogeochemical sampling to determine potential sources of recharge, and chemical thermodynamic estimations to determine potential changes in transfer of bitumen compounds to water. Because the ridgetops in an area of the Tavaputs Plateau named PR Spring are starting to be developed for their tar sand resource, there is concern for potential hydrologic connection between these ridgetops and perennial springs in adjacent canyons on which depend ranching families, livestock, wildlife and recreationalists. Samples were collected from perennial springs to examine possible progression with elevation of parameters such as temperature, specific conductance, pH, dissolved oxygen, isotopic tracers of phase change, water-rock interaction, and age since recharge. The groundwater age dates indicate that the springs are recharged locally. The progression of hydrogeochemical parameters with elevation, in combination with the relatively short groundwater residence times, indicate that the recharge zone for these springs includes the surrounding ridges, and thereby suggests a hydrologic connection between the mining, processing, disposal area and the springs. Estimations based on chemical thermodynamic approaches indicate that bitumen compounds will have greatly enhanced solubility in water that comes into contact with the residual bitumen–solvent mixture in disposed tailings relative to water that currently comes into contact with natural tar. - Highlights: • The potential water quality impacts of the first US tar sand development are considered. • Analyses of perennial springs in adjacent canyons indicate hydrologic

  7. Radon emission from uranium mining waste rock dumps and resulting radon immission; Radonemissionsverhalten von Halden des Uranbergbaus und daraus resultierende Radonemissionen

    Energy Technology Data Exchange (ETDEWEB)

    Regner, J.; Hinz, W.; Schmidt, P. [Wismut GmbH, Chemnitz (Germany)

    2016-07-01

    Since more than 20 years, Wismut GmbH has been investigating the radon situation at uranium mining waste rock dumps. In the present paper the results of 19 complex studies at uranium mining dumps in the Erzgebirge (Ore Mountains) are reported. Although the mean specific activity of Ra-226 of the waste rock material was on a rather low level of about 0.5 Bq/g, the mean radon concentration in free atmosphere at the public exposure sites in the immediate vicinity of the dumps reached a value of about 1000 Bq/m{sup 3} for a half-year exposition and of about 600 Bq/m{sup 3} for a one-year exposition. Certain geometries and structures of waste rock dumps and the occurrence of convective airflows in the dumps are main reasons for the high radon emission despite of the relatively low specific Ra-226 activity. A case study for two buildings directly on the top of a waste rock dump in the town Johanngeorgenstadt is presented. The hypothetical interpolation of the results for Ra-226-activity to a value below the threshold value of 0.2 Bq/g leads to the assumption that problematic radon situations may also occur outside the areas of legacies of uranium mining. Considering the aspects mentioned, a clearance level for NORM of 1 Bq/g is questionable.

  8. Systems analysis on the humanization of industrial life in the coal mining industry. Pt. 2. Results. Systemanalyse zur Humanisierung des Arbeitslebens im Steinkohlenbergbau. T. 2. Ergebnisse

    Energy Technology Data Exchange (ETDEWEB)

    1980-01-01

    Volume No. 8 of the series of papers quantifies the system of aims, i.e. it defines synthetic data of laws and regulations of mining of DIN standards, and VDI guidelines, of generally accepted rules of engineering as well as of certified findings of industrial science as minimum requirements. This definition is followed by the examination of the type of medium-term development to be expected in the bituminous coal mining industry of the Ruhrkohle AG up to the year 1985. Then the general aims 1 and 2 given in volume No. 7 are described in detail. These descriptions constitute an excellent summary of the present state of knowledge concerning the improvement of working conditions in the bituminous coal mining industry. Finally, a study on the transferability of research findings is given. One statement is of special importance, i.e., that transferability is not characterized by technological feasibility alone which depends to a high degree on marginal, organizational conditions within the company, e.g., on the information system, on its hierarchical structure, on the company's policy, and on departamental policy. In this study, only the technological transferability is examined. To enable us to assess it, appropriate statements are made in a brief description of the research project carried out since 1974, which was sponsored within the action programme ''Humanization of Industrial Life''.

  9. Qualitative evaluation of environmental radiological impact in a phosphate associated uranium conventional mine: Santa Quiteria Project, CE, Brazil

    International Nuclear Information System (INIS)

    Reis, Rocio G. dos; Santo, Aline Sa E.

    2013-01-01

    The aim of this study is to identify and evaluate qualitatively the main potential sources of mineral and installation terms of Santa Quiteria, CE, Brazil, evaluating their possible impacts on the environment. The key terms sources in the production of phosphoric acid are usually: the dig of the mines, tailings dams and phospho plaster stack. Thus, this work intends to inform the academic community about this issue, as well as the population in general and also, acting proactively in order to warn about the possible environmental impacts, so that actions to compensate, minimize or avoid these radiological impacts on the environment, can be included in the planning of the industrial mineral project of Santa Quiteria (author)

  10. Contribution of Mining Activities and Development in Africa: Private ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Reports. Corporate Social Responsibility (CSR) and development in Africa : redefining the roles and responsibilities of public and private actors in the mining sector. Download PDF. Reports. Des caravanes juridiques à la relecture du Code minier : capitalisation des expériences en matière de développement des capacités ...

  11. Conservation Beyond Park Boundaries: The Impact of Buffer Zones on Deforestation and Mining Concessions in the Peruvian Amazon

    Science.gov (United States)

    Weisse, Mikaela J.; Naughton-Treves, Lisa C.

    2016-08-01

    Many researchers have tested whether protected areas save tropical forest, but generally focus on parks and reserves, management units that have internationally recognized standing and clear objectives. Buffer zones have received considerably less attention because of their ambiguous rules and often informal status. Although buffer zones are frequently dismissed as ineffective, they warrant attention given the need for landscape-level approaches to conservation and their prevalence around the world—in Peru, buffer zones cover >10 % of the country. This study examines the effectiveness of buffer zones in the Peruvian Amazon to (a) prevent deforestation and (b) limit the extent of mining concessions. We employ covariate matching to determine the impact of 13 buffer zones on deforestation and mining concessions from 2007 to 2012. Despite variation between sites, these 13 buffer zones have prevented ~320 km2 of forest loss within their borders during the study period and ~1739 km2 of mining concessions, an outcome associated with the special approval process for granting formal concessions in these areas. However, a closer look at the buffer zone around the Tambopata National Reserve reveals the difficulties of controlling illegal and informal activities. According to interviews with NGO employees, government officials, and community leaders, enforcement of conservation is limited by uncertain institutional responsibilities, inadequate budgets, and corruption, although formal and community-based efforts to block illicit mining are on the rise. Landscape-level conservation not only requires clear legal protocol for addressing large-scale, formal extractive activities, but there must also be strategies and coordination to combat illegal activities.

  12. Conservation Beyond Park Boundaries: The Impact of Buffer Zones on Deforestation and Mining Concessions in the Peruvian Amazon.

    Science.gov (United States)

    Weisse, Mikaela J; Naughton-Treves, Lisa C

    2016-08-01

    Many researchers have tested whether protected areas save tropical forest, but generally focus on parks and reserves, management units that have internationally recognized standing and clear objectives. Buffer zones have received considerably less attention because of their ambiguous rules and often informal status. Although buffer zones are frequently dismissed as ineffective, they warrant attention given the need for landscape-level approaches to conservation and their prevalence around the world-in Peru, buffer zones cover >10 % of the country. This study examines the effectiveness of buffer zones in the Peruvian Amazon to (a) prevent deforestation and (b) limit the extent of mining concessions. We employ covariate matching to determine the impact of 13 buffer zones on deforestation and mining concessions from 2007 to 2012. Despite variation between sites, these 13 buffer zones have prevented ~320 km(2) of forest loss within their borders during the study period and ~1739 km(2) of mining concessions, an outcome associated with the special approval process for granting formal concessions in these areas. However, a closer look at the buffer zone around the Tambopata National Reserve reveals the difficulties of controlling illegal and informal activities. According to interviews with NGO employees, government officials, and community leaders, enforcement of conservation is limited by uncertain institutional responsibilities, inadequate budgets, and corruption, although formal and community-based efforts to block illicit mining are on the rise. Landscape-level conservation not only requires clear legal protocol for addressing large-scale, formal extractive activities, but there must also be strategies and coordination to combat illegal activities.

  13. The Impact of the Rock Mass Deformation on Geometric Changes of a Historical Chimney in the Salt Mine of Bochnia

    Science.gov (United States)

    Szafarczyk, Anna; Gawałkiewicz, Rafał

    2018-03-01

    There are many ways of the geometry measurement of slim objects, with the application of geodetic and photogrammetric methods. A modern solution in the diagnostics of slim objects is the application of laser scanning, with the use of a scanner of a scanning total station. The point cloud, obtained from the surface of the scanned object gives the possibility of generating not only information on structural surface deformations, but also facilitates obtaining the data on the geometry of the axis of the building, as a basic indicator of the characteristics of its deformation. The cause of the change in the geometry of slim objects is the impact of many external and internal factors. These objects are located in the areas of working or closed underground mines. They can be impacted by the ground and they can face the results of the convergence of cavities. A specific structure of the salt rock mass causes subsequent convergence of the post-exploitation cavities, which has the influence on the behaviour of the terrain surface and the related objects. The authors analysed the impact of the changes in the rock mass and the surface on the changes of the industrial chimney in the Bochnia Salt Mine.

  14. Hidden impacts of the Samarco mining waste dam collapse to Brazilian marine fauna - an example from the staurozoans (Cnidaria)

    OpenAIRE

    Miranda, Lucília Souza; Marques, Antonio Carlos

    2016-01-01

    The collapse of the Fundão tailings dam at Mariana (State of Minas Gerais, Brazil) started a huge human tragedy and likely the most serious environmental disaster in recent Brazilian history. The dam had contained waste from processing iron ore from mines owned by Samarco, a joint venture company of the Brazilian Vale S.A. and the Anglo-Australian BHP Billiton Ltd. Following ineffective attempts to contain the disaster, after 16 days the mud flood reached the sea, where its impact is expected...

  15. Brief sketch on: The evaluation, modifications, effects, attenuations and monitored of the environmental impact produced by the mining

    International Nuclear Information System (INIS)

    Gaviria Rivera Antonio

    1992-01-01

    Any type of mining methodology is unavoidable and in the majority of the cases irrevocable due to the great necessity of row materials demanded by the consumption increasing and progress. for these reasons this activity is constantly causing damages against either t the community t or the nature it self or both. The only feasible solution to diminish this damage is to take the proper precautions to decrease the resultant degradation and impact. If it is possible to set them into tolerable levels, which must be very close to the existing environmental norms

  16. Impact of North Mara gold mine on the element contents in fish from the river Mara, Tanzania

    Czech Academy of Sciences Publication Activity Database

    Mohamed, N. K.; Ntarisa, A. V. R.; Makundi, I. N.; Kučera, Jan

    2016-01-01

    Roč. 309, č. 1 (2016), s. 421-427 ISSN 0236-5731. [14th International Conference on Modern Trends in Activation Analysis (MTAA) / 11th International conference on Nuclear Analytical Methods in the Life Science (NAMLS). Delft, 23.08.2015-23.08.2015] R&D Projects: GA MŠk(CZ) LM2011019; GA ČR(CZ) GBP108/12/G108 Institutional support: RVO:61389005 Keywords : gold mining * contamination * lungfish * catfisch * INAA * EDXRF Subject RIV: CB - Analytical Chemistry, Separation Impact factor: 1.282, year: 2016

  17. Environmental Justice and Sustainability Impact Assessment: In Search of Solutions to Ethnic Conflicts Caused by Coal Mining in Inner Mongolia, China

    OpenAIRE

    Liu, Lee; Liu, Jie; Zhang, Zhenguo

    2014-01-01

    The Chinese government adopted more specific and stringent environmental impact assessment (EIA) guidelines in 2011, soon after the widespread ethnic protests against coal mining in Inner Mongolia. However, our research suggests that the root of the ethnic tension is a sustainability problem, in addition to environmental issues. In particular, the Mongolians do not feel they have benefited from the mining of their resources. Existing environmental assessment tools are inadequate to address su...

  18. Impact of Mining Activities on Water Resources in the Vicinity of the ...

    African Journals Online (AJOL)

    T. M. Akabzaa11*, B. K. Banoeng-Yakubo1 and J. S. Seyire2

    1 Department of Geology, P. O. Box LG 58, University of Ghana, Legon, Ghana ... scale mining are attributed to the use of this chemical by miners in gold amalgamation. ..... Elevated metal leaching is usually associated with acidic drainage due to high metal .... Arsenic status of Ghana soils- Contamination of soils near gold.

  19. The radiological impact of the Ranger Uranium Mine on the general public in Jabiru

    International Nuclear Information System (INIS)

    Kavasnicka, Jiri

    1992-01-01

    Potential alpha energy concentrations (PAEC) of radon daughters were monitored by a Kodak LR 115 nuclear track detector both outdoors and indoors in Jabiru (a township 9 km west of the Ranger Uranium Mine) at five locations between Ranger and Jabiru during the 1989 Dry Season. The average outdoor PAEC and the indoor PAEC in private dwellings in Jabiru were 2.4 ± 0.2 mWL and 2.4 ± 0.7 mWL respectively. Though the total radon emission from the Ranger Uranium Mine (RUM) project is relatively high (about 7 MBq s -1 ) the mining and milling of uranium contributes only marginally to the PAEC in Jabiru as can be seen from results of the air dispersion modelling and environmental radon daughter monitoring carried out in parallel with the indoor monitoring in Jabiru. The description of the radon daughter monitor and the major characteristics of the RUM project are given in the Appendixes. The average annual PAEC in Jabiru attributable t the mining and milling operations at Ranger was calculated to be about 0.16 mWL, which corresponds to an effective dose equivalent of 0.07 mSv y -1 (7% of the 1 mSv y -1 public limit) for members of the public in Jabiru. 17 refs., 3 tab., 7 figs

  20. Evaluation of the impact of mine activity on surrounding soils of Draa ...

    African Journals Online (AJOL)

    Heavy metal pollution is one of the most important problems in Morocco and causes serious effects to humans and animals. The aim of the present study was to evaluate the spatial distribution of heavy metals in Draa Lasfar mine area in Marrakech city and understand the characteristics of the pollution generated by this ...

  1. Study of the effect of environmental impact on land mine detection using nuclear techniques

    International Nuclear Information System (INIS)

    Aziz, M.; Massoud, E.

    2005-01-01

    Parameters that affect the accuracy of landmine detection using nuclear methods were analyzed. The influence of the soil type and water content on the detection processes were studied by calculating the backscattered neutron and gamma - rays at the detector. The difference at the detector between mines and several organic objects were calculated and analyzed

  2. Impact of small scale gold mining on soils of the wetland forests in ...

    African Journals Online (AJOL)

    Effects of soil disturbance on both physical and chemical characteristics of the soils were also very vivid. The soils disturbed from gold mining possessed an altered soil structure, improper development of soil horizons and removal of organic matter on the surface. Burried A horizons were found in all plots at the disturbed ...

  3. An Assessment of Potential Mining Impacts on Salmon Ecosystems of Bristol Bay, Alaska (Final Report)

    Science.gov (United States)

    The Bristol Bay watershed in southwestern Alaska supports the largest sockeye salmon fishery in the world, is home to 25 federally recognized tribal governments, and contains large mineral resources. The potential for large-scale mining activities in the watershed has raised conc...

  4. Environmental Impact of the Lead-Zinc Mine at Mestersvig, East Greenland

    DEFF Research Database (Denmark)

    Johansen, Poul; Asmund, Gert; Aastrup, Peter

    2008-01-01

    Det danske selskab Nordisk Mineselskab drev en bly-zink mine ved Mestersvig i Østgrønland fra 1956 til 1963. Minedriften fandt sted under overfladen ca. 10 km inde i landet syd for Kong Oscars Fjord. Der blev brudt 554.000 tons malm og produceret 58.000 tons blykoncentrat og 75.000 tons zinkkonce...

  5. 4 The Impact of Small scale Mining on Irrigation Water.cdr

    African Journals Online (AJOL)

    user

    has over the years created numerous employment, especially, in rural areas where there are limited formal sector jobs ... Small scale mining is a major threat to water resources and agricultural ..... upstream with a mean value of 49.8mg/l.

  6. Mine water pollution - acid mine decant, effluent and treatment: a consideration of key emerging issues that may impact the State of the Environment

    CSIR Research Space (South Africa)

    Oelofse, Suzanna HH

    2009-01-01

    Full Text Available into the implications of extending coal mining in that region. 1 0 ? On 6 December 2006 the NSW Govern ment established an independent inquiry into underground coal mining in the Southern Coalfield. 1 1 ? On 5 Febr uary 2007 the NSW Gover nme nt appointed...

  7. Radiological impacts of Jackpile-Paguate uranium mines: an analysis of alternatives of decommissioning

    International Nuclear Information System (INIS)

    Momeni, M.H.; Tsai, S.Y.H.; Yang, J.Y.; Gureghian, A.B.; Dungey, C.E.

    1983-03-01

    Potential pathways of radiation exposure and radiation-induced genetic and somatic effects from materials at the mine complex under five alternatives of decommissioning were analyzed using UDAD and PRIM computer codes. The principal pathways of exposure included in the analysis were inhalation of airborne radionuclides, ingestion of food and water containing radionuclides, and extended exposure to gamma and beta radiation from either airborne or ground-deposited radionuclides. The alternatives of decommissioning include (A) No Action (site will be fenced, otherwise left as it is), (B) No Future Use (site will be fenced and all disturbed area will be covered with 30 cm of soil, no grazing on the site); (C1) Grazing Land Use as developed by Anaconda Company (protore, waste piles, and open pits covered with 120 cm of soil, the remainder of the disturbed areas covered with 30 cm of soil, pits backfilled 90 cm above the equilibrium groundwater recovery level, no human habitation or farming allowed on the mine site, but grazing would be allowed); (C2) Grazing Land Use as developed by US Department of the Interior (similar to Alternative C1, but the pits covered with 300 cm of soil above the groundwater recovery level); and (D) Maximum Future Use (similar to Alternative C2, except construction of commercial and industrial facilities, storage, recreation, and further mining would be allowed). Radiation doses from atmospheric transport and ingestion of radionuclides were calculated, and somatic and genetic effects in individuals living within 80 km from the mine complex were predicted. Hydrological flow patterns in the mine area were analyzed to determine the potential for future contamination of surface water and groundwater and to determine the groundwater recovery level after reclamation, thus permitting incorporation of corrective actions into the reclamation procedures

  8. Air quality impact assessment of multiple open pit coal mines in northern Colombia.

    Science.gov (United States)

    Huertas, José I; Huertas, María E; Izquierdo, Sebastián; González, Enrique D

    2012-01-01

    The coal mining region in northern Colombia is one of the largest open pit mining regions of the world. In 2009, there were 8 mining companies in operation with an approximate coal production of ∼70 Mtons/year. Since 2007, the Colombian air quality monitoring network has reported readings that exceed the daily and annual air quality standards for total suspended particulate (TSP) matter and particles with an equivalent aerodynamic diameter smaller than 10 μm (PM₁₀) in nearby villages. This paper describes work carried out in order to establish an appropriate clean air program for this region, based on the Colombian national environmental authority requirement for modeling of TSP and PM(10) dispersion. A TSP and PM₁₀ emission inventory was initially developed, and topographic and meteorological information for the region was collected and analyzed. Using this information, the dispersion of TSP was modeled in ISC3 and AERMOD using meteorological data collected by 3 local stations during 2008 and 2009. The results obtained were compared to actual values measured by the air quality monitoring network. High correlation coefficients (>0.73) were obtained, indicating that the models accurately described the main factors affecting particle dispersion in the region. The model was then used to forecast concentrations of particulate matter for 2010. Based on results from the model, areas within the modeling region were identified as highly, fairly, moderately and marginally polluted according to local regulations. Additionally, the contribution particulate matter to the pollution at each village was estimated. Using these predicted values, the Colombian environmental authority imposed new decontamination measures on the mining companies operating in the region. These measures included the relocation of three villages financed by the mine companies based on forecasted pollution levels. Copyright © 2011. Published by Elsevier Ltd.

  9. Impact of open manganese mines on the health of children dwelling in the surrounding area

    Science.gov (United States)

    Duka, Ykateryna D.; Ilchenko, Svetlana I.; Kharytonov, Mykola M.; Vasylyeva, Tetyana L.

    2011-01-01

    Introduction: Chronic manganese (Mn) exposure is a health hazard associated with the mining and processing of Mn ores. Children living in an area with increased environmental exposure to Mn may have symptoms of chronic toxicity that are different from adults who experience occupational exposure. The aim of the study was to compare health outcomes in a pediatric population living near open Mn mines with a group of children from a reference area and then to develop and implement preventive/rehabilitation measures to protect the children in the mining region. Methods: After environmental assessment, a group of 683 children living in a Mn-rich region of Ukraine were screened by clinical evaluation, detection of sIgA (37 children), micronucleus analysis (56 children), and hair Mn content (166 children). Results: Impaired growth and rickets-like skeletal deformities were observed in 33% of the children. This was a significantly higher percentage than in children in the reference region (15%). The children from the Mn-mining region also had increased salivary levels of immunoglobulin A (104.4±14.2 mcg/ml vs. 49.7±6.1 mcg/ml among the controls (p<0.05), increased serum alpha 1 proteinase inhibitor levels (4.93±0.21 g/l compared with 2.91±0.22 g/l for controls; p<0.001) and greater numbers of micronuclei in the mucous cells of the oral cavity (0.070±0.008 vs. 0.012±0.009, p<0.001). Conclusions: These findings indicate the deleterious health consequences of living in a Mn-mining area. Medical rehabilitation programs were conducted and produced positive results, but further validation of their effectiveness is required. The study provided background information to formulate evidence-based decisions about public health in a region of high Mn exposure. PMID:24149028

  10. Preliminary manual of the wind farms impacts study; Manuel preliminaire de l'etude d'impact des parcs eoliens

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-11-01

    This document aims to present and propose tools and methods allowing the improve the environmental quality of the future wind farms projects. After a presentation of general notions on the wind farms and the economy of the wind energy, it presents the regulation and the procedures concerning the environmental impact. It proposes then the main possible effects and the impacts study themes. (A.L.B.)

  11. Determine Appropriate Post Mining Land Use in Indonesia Coal Mining Using Land Suitability Evaluation

    OpenAIRE

    Maryati, Sri; Shimada, Hideki; Hamanaka, Akihiro; Sasaoka, Takashi; Matsui, Kikuo

    2012-01-01

    Coal mining industry gives many benefits for Indonesia including contribution in total Indonesian GDP. Most of coal mines in Indonesia are open pit mining method which disturbs large area of land. One of open pit mining impact is damage land and related to soil erosion occurrences it will degrade land by top soil loses. Indonesia Government has issued mine closure regulation to encourage mining industry provide post mining land use. Determination of post mining land use should be considering ...

  12. Identification of linkages between potential Environmental and Social Impacts of Surface Mining and Ecosystem Services in Thar Coal field, Pakistan

    Science.gov (United States)

    Hina, A.

    2017-12-01

    Although Thar coal is recognized to be one of the most abundant fossil fuel that could meet the need to combat energy crisis of Pakistan, but there still remains a challenge to tackle the associated environmental and socio-ecological changes and its linkage to the provision of ecosystem services of the region. The study highlights the importance of considering Ecosystem service assessment to be undertaken in all strategic Environmental and Social Assessments of Thar coal field projects. The three-step approach has been formulated to link the project impacts to the provision of important ecosystem services; 1) Identification of impact indicators and parameters by analyzing the environmental and social impacts of surface mining in Thar Coal field through field investigation, literature review and stakeholder consultations; 2) Ranking of parameters and criteria alternatives using Multi-criteria Decision Analysis(MCDA) tool: (AHP method); 3) Using ranked parameters as a proxy to prioritize important ecosystem services of the region; The ecosystem services that were prioritized because of both high significance of project impact and high project dependence are highlighted as: Water is a key ecosystem service to be addressed and valued due to its high dependency in the area for livestock, human wellbeing, agriculture and other purposes. Crop production related to agricultural services, in association with supply services such as soil quality, fertility, and nutrient recycling and water retention need to be valued. Cultural services affected in terms of land use change and resettlement and rehabilitation factors are recommended to be addressed. The results of the analysis outline a framework of identifying these linkages as key constraints to foster the emergence of green growth and development in Pakistan. The practicality of implementing these assessments requires policy instruments and strategies to support human well-being and social inclusion while minimizing

  13. 76 FR 19786 - Notice of Availability of the Draft Environmental Impact Statement for the Celatom Mine Expansion...

    Science.gov (United States)

    2011-04-08

    ... Vale, Oregon. The Celatom Mine Complex currently consists of three open-pit mines: Kelley Field (on BLM... within the Project Area. Activities under the Proposed Action, including final reclamation, would be... the Project Area include open pit mines, roads within the mine operations areas, and other operations...

  14. The Impact of Variability of Selected Geological and Mining Parameters on the Value and Risks of Projects in the Hard Coal Mining Industry

    Science.gov (United States)

    Kopacz, Michał

    2017-09-01

    The paper attempts to assess the impact of variability of selected geological (deposit) parameters on the value and risks of projects in the hard coal mining industry. The study was based on simulated discounted cash flow analysis, while the results were verified for three existing bituminous coal seams. The Monte Carlo simulation was based on nonparametric bootstrap method, while correlations between individual deposit parameters were replicated with use of an empirical copula. The calculations take into account the uncertainty towards the parameters of empirical distributions of the deposit variables. The Net Present Value (NPV) and the Internal Rate of Return (IRR) were selected as the main measures of value and risk, respectively. The impact of volatility and correlation of deposit parameters were analyzed in two aspects, by identifying the overall effect of the correlated variability of the parameters and the indywidual impact of the correlation on the NPV and IRR. For this purpose, a differential approach, allowing determining the value of the possible errors in calculation of these measures in numerical terms, has been used. Based on the study it can be concluded that the mean value of the overall effect of the variability does not exceed 11.8% of NPV and 2.4 percentage points of IRR. Neglecting the correlations results in overestimating the NPV and the IRR by up to 4.4%, and 0.4 percentage point respectively. It should be noted, however, that the differences in NPV and IRR values can vary significantly, while their interpretation depends on the likelihood of implementation. Generalizing the obtained results, based on the average values, the maximum value of the risk premium in the given calculation conditions of the "X" deposit, and the correspondingly large datasets (greater than 2500), should not be higher than 2.4 percentage points. The impact of the analyzed geological parameters on the NPV and IRR depends primarily on their co-existence, which can be

  15. 55 Degré d'impact des aménagements hydrauliques sur le ...

    African Journals Online (AJOL)

    AKA BOKO

    Hydraulics installations impact degree on streaming and solid transport : case of micro-basins in the top Isser, Algeria. Erosion is a whole of variable processes in time and space. The variation is done according to the ecological conditions and of the bad conditions of management of the ground by the man. This is why the ...

  16. 97 Épandage des margines sur les sols agricoles : impacts ...

    African Journals Online (AJOL)

    AKA BOKO

    Spreading of olive mill wastewater on agricultural soils: environmental microbiological impacts. It has been shown that the olive mill effluents (OME), which are a waste water of olive oil extraction process, constitutes an alternative among the solutions proposed. Thus provided that this operation should be realized by a ...

  17. Physiological strain in the Hungarian mining industry: The impact of physical and psychological factors.

    Science.gov (United States)

    Varga, József; Nagy, Imre; Szirtes, László; Pórszász, János

    2016-01-01

    The objectives of these investigations completed on workplaces in the Hungarian mining industry were to characterize the physiological strain of workers by means of work pulse and to examine the effects of work-related psychological factors. Continuous heart rate (HR) recording was completed on 71 miners over a total of 794 shifts between 1987 and 1992 in mining plants of the Hungarian mining industry using a 6-channel recorder - Bioport (ZAK, Germany). The work processes were simultaneously documented by video recording along with drawing up the traditional ergonomic workday schedule. All workers passed health evaluation for fitness for work. The effects of different psychological factors (simulated danger, "instrument stress," presence of managers, and effect of prior involvement in accidents as well as different mining technologies and work place illumination) on the work pulse were evaluated. The statistical analysis was completed using SPSS software (version 13.0, SPSS Inc., USA). The work-related physiological strain differed between work places with different mining technologies in groups of 12-18 workers. The work pulse was lowest in bauxite mining (ΔHR = 22±8.9 bpm) and highest in drift drilling in dead rock with electric drilling machine (ΔHR = 30±6.9 bpm). During sham alarm situation the work pulse was significantly higher than during normal activities with the same physical task (ΔHR = 36.7±4.8 bpm vs. 25.8±1.6 bpm, p < 0.001). When work was performed under different psychological stress, the work pulse was consistently higher, while improving the work place illumination decreased the physiological strain appreciably (ΔHR (median, 25-75 percentiles) = 23, 20-26 bmp vs. 28, 25-31.3 bpm, p < 0.001). Recording the heart rate during whole-shift work along with the work conditions gives reliable results and helps isolating factors that contribute to increased strain. The results can be used to implement preventive and health promotion measures. This

  18. Physiological strain in the Hungarian mining industry: The impact of physical and psychological factors

    Directory of Open Access Journals (Sweden)

    József Varga

    2016-08-01

    Full Text Available Objectives: The objectives of these investigations completed on workplaces in the Hungarian mining industry were to characterize the physiological strain of workers by means of work pulse and to examine the effects of work-related psychological factors. Material and Methods: Continuous heart rate (HR recording was completed on 71 miners over a total of 794 shifts between 1987 and 1992 in mining plants of the Hungarian mining industry using a 6-channel recorder – Bioport (ZAK, Germany. The work processes were simultaneously documented by video recording along with drawing up the traditional ergonomic workday schedule. All workers passed health evaluation for fitness for work. The effects of different psychological factors (simulated danger, “instrument stress,” presence of managers, and effect of prior involvement in accidents as well as different mining technologies and work place illumination on the work pulse were evaluated. The statistical analysis was completed using SPSS software (version 13.0, SPSS Inc., USA. Results: The work-related physiological strain differed between work places with different mining technologies in groups of 12–18 workers. The work pulse was lowest in bauxite mining (ΔHR = 22±8.9 bpm and highest in drift drilling in dead rock with electric drilling machine (ΔHR = 30±6.9 bpm. During sham alarm situation the work pulse was significantly higher than during normal activities with the same physical task (ΔHR = 36.7±4.8 bpm vs. 25.8±1.6 bpm, p < 0.001. When work was performed under different psychological stress, the work pulse was consistently higher, while improving the work place illumination decreased the physiological strain appreciably (ΔHR (median, 25–75 percentiles = 23, 20–26 bmp vs. 28, 25–31.3 bpm, p < 0.001. Conclusions: Recording the heart rate during whole-shift work along with the work conditions gives reliable results and helps isolating factors that contribute to increased strain. The

  19. Perceptions locales de la manifestation des changements ...

    African Journals Online (AJOL)

    SARAH

    . PRPR. ERMA. DC. UD cluster 1 cluster 2. Pauvres. Riches et moyens. Figure 4. Positionnement des classes d'impacts socio-économiques des changements climatiques dans un système d'axes de l'analyse factorielle des ...

  20. Environmental analysis report for the proposed development of a wind turbine array near the town of Thetford Mines and the municipalities of Saint-Jean-de-Brebeuf and Kinnear's Mills by Energie Eolienne Des Moulins S.E.C

    International Nuclear Information System (INIS)

    Dupont, C.; Theberge, M.C.

    2010-01-01

    Energie Eolienne Des Moulins S.E.C. has responded to Hydro-Quebec's call for tenders to construct a wind turbine array in the Chaudiere Appalache area, north of Thetford Mines to meet the future energy needs of the region. This document described the reasons for the project and provided a general description of the project. The company will install 78 wind turbines, of which 75 are 2 MW and 3 are 2.3 MW for a total capacity of 156.9 MW. This project requires a certificate of authorization from the provincial government and must undergo an environmental assessment. As part of the process, public inquiries were held in September and October 2009 to consult with stakeholders, project proponents and those opposed to the project. The main challenges facing the project include concerns by local residents regarding the local economy, visual aesthetics of the project, noise pollution, and hazards for birds and bats. This document also covered other considerations, such as drinking water sources; public security and emergency procedures; telecommunications; electromagnetic interference; shadow effect; eco-tourism; waste management; dust and particulates; forest management; endangered plant species; soil management; wetlands; surface waters; aquatic ecosystems; and deer. Upon review of all these considerations, a follow-up committee at the Quebec Ministry of Sustainable Development, Environment and Parks decided that the project is justifiable and acceptable from an environmental point of view and has recommended that the project proceed. 47 refs., 3 tabs., 3 figs., 4 appendices.

  1. Oil shale mining and processing impact on landscapes in north-east Estonia

    International Nuclear Information System (INIS)

    Toomik, Arvi; Liblik, Valdo

    1998-01-01

    As the world's largest commercial oil shale reserve, the Estonian Oil Shale Deposit has been exploited since 1916. As a result of mining, storing of solid wastes from the oil shale separation, combustion in the power plants and its thermal processing, the landscape in northeastern Estonia has been essentially changed and the man-made landforms have developed: the new microreliefs of natural and artificial structure are formed, as well as 'mountainous' and hilly reliefs in the form of waste heaps, ash plateaus, coke-ash dumps etc. Deformed (stable) and undeformed (unstable) areas from underground mining currently cover about 220km 2 . About 90km 2 (80%) of the area damaged by open pits are recultivated and reformed as forested and agricultural (grassland) areas. The total area occupied by solid waste has reached up to 26km 2 . New technogenic landscape units, i.e. made by technical means, will essentially influence the environment

  2. Arbuscular mycorrhizal fungi in a semi-arid, limestone mining-impacted area of Brazil

    Directory of Open Access Journals (Sweden)

    Thaís Teixeira-Rios

    2013-12-01

    Full Text Available The main goal of this study was to determine the diversity and activity of arbuscular mycorrhizal fungi (AMF in an area degraded by limestone mining within the semi-arid region of Brazil known as the caatinga (shrublands. Near a limestone quarry, we selected two areas of caatinga (preserved and degraded for study. The number of glomerospores did not differ significantly between the two areas. There was a trend toward the most probable number of infective propagules being higher in the degraded area. Twenty AMF taxa were identified in the two sampled areas, species richness, diversity and evenness being higher in the preserved area. Two species of Racocetra represent new records for the semi-arid region of Brazil. Glomerospore production and AMF species richness were unaffected by mining activity in the study area.

  3. Setting rehabilitation priorities for abandoned mines of similar characteristics according to their visual impact: The case of Milos Island, Greece

    OpenAIRE

    Evangelos Mavrommatis; Maria Menegaki

    2017-01-01

    Mine rehabilitation is nowadays an essential part of the mine life-cycle. Nevertheless, due to the inadequate legislative framework and the lack of appropriate financial instruments in the past, abandoned mined land is present in almost all regions with a mining history. Especially in times of fiscal and financial belt tightening, where direct funding is almost impossible, the restoration of abandoned mines becomes a difficult task and, consequently, prioritization of the restoration projects...

  4. Groundwater assessment and environmental impact in the abandoned mine of Kettara (Morocco).

    Science.gov (United States)

    Moyé, Julien; Picard-Lesteven, Tanguy; Zouhri, Lahcen; El Amari, Khalid; Hibti, Mohamed; Benkaddour, Abdelfattah

    2017-12-01

    Many questions about the soil pollution due to mining activities have been analyzed by numerous methods which help to evaluate the dispersion of the Metallic Trace Elements (MTE) in the soil and stream sediments of the abandoned mine of Kettara (Morocco). The transport of these MTE could have an important role in the degradation of groundwater and the health of people who are living in the vicinity. The present paper aims to evaluate the groundwater samples from 15 hydrogeological wells. This evaluation concerns the hydrogeological parameters, pH, Electrical conductivity, temperature and the groundwater level, and the geochemical assessment of Mg, Ca, Ti, Cr, Mn, Fe, Co, Ni, Zn, Cu, As, Se, Cd, Sb, Tl and Pb. Furthermore, the Metallic Trace Elements are transported in the saturated zone via the fractures network. The groundwater flow is from the north-east to south-west. The spatial distribution of As, Fe, Zn and Mn is very heterogeneous, with high values observed in the north, upstream, of the mine site. This distribution is maybe related to: i) the existence of hydrogeological structures (dividing and drainage axes); ii) the individualization of the fractures network that affects the shaly lithostratigraphical formation; iii) the transport of the contaminants from the soil towards groundwater; and iv) interaction water/rocks. Some MTE anomalies are linked to the lithology and the fracturation system of the area. Therefore, the groundwater contamination by Arsenic is detected in the hydrogeological wells (E1 and E2). This pollution which is higher than guideline standards of Moroccan drinking water could affect the public health. The hydrogeological and geochemical investigations favor the geological origin (mafic rocks) of this contamination rather than mining activities. Copyright © 2017. Published by Elsevier Ltd.

  5. Methyl Mercury Production In Tropical Hydromorphic Soils: Impact Of Gold Mining.

    Science.gov (United States)

    Guedron, S.; Charlet, L.; Harris, J.; Grimaldi, M.; Cossa, D.

    2007-12-01

    Artisanal alluvial gold mining is important in many tropical developing countries and several million people are involved worldwide. The dominant use of mercury for gold amalgamation in this activity leads to mercury accumulation in soils, to sediment contamination and to methyl mercury (MMHg) bioaccumulation along the food chain. In this presentation we will present recent data on methyl mercury production in hydromorphic soils and tailing ponds from a former gold mining area located in French Guiana (South America). Comparison of specific fluxes between a pristine sub watershed and the contaminated watershed shows that former mining activities lead to a large enhancement of dissolved and particulate MMHg emissions at least by a factor of 4 and 6, respectively. MMHg production was identified in sediments from tailing ponds and in surrounding hydromorphic soils. Moreover, interstitial soil water and tailing pond water profiles sampled in an experimental tailing pond demonstrate the presence of a large MMHg production in the suboxic areas. Both tailing ponds and hydromorphic soils present geochemical conditions that are favorable to bacterial mercury methylation (high soil Hg content, high aqueous ferric iron and dissolved organic carbon concentrations). Although sulfate-reducing bacteria have been described as being the principal mercury methylating bacteria, the positive correlation between dissolved MMHg and ferrous iron concentrations argue for a significant role of iron-reducing bacteria. Identifications by sequencing fragments of 16S rRNA from total soil DNA support these interpretations. This study demonstrates that current and past artisanal gold mining in the tropics lead to methyl mercury production in contaminated areas. As artisanal activities are increasing with increasing gold prices, the bio- magnification of methyl mercury in fish presents an increasing threat to local populations whose diet relies on fish consumption.

  6. Environmental impact of early Basque mining and smelting recorded in a high ash minerogenic peat deposit

    International Nuclear Information System (INIS)

    Monna, F.; Galop, D.; Carozza, L.; Tual, M.; Beyrie, A.; Marembert, F.; Chateau, C.; Dominik, J.; Grousset, F.E.

    2004-01-01

    More than four metres of core, covering almost 5000 years of deposition, were collected in a high ash minerogenic peat deposit located in the High Aldudes valley (Basque country), an area well known for its mineral abundance, exploited from Roman Times at least. Although minerogenic peatlands are not generally considered as the best archives to reconstruct past atmospheric metal deposition history, lead isotopic geochemistry demonstrates the integrity of the Pb record at least within the three upper meters; that is to say over the last four millennia. Zn, Cd and Cu may have been widely redistributed either by biological cycling, advective groundwater movements, or diffusional processes. Anthropogenic lead input phases are clearly pinpointed by positive shifts in Pb/Sc ratios with concomitant sharp drops in 206 Pb/ 207 Pb ratios. They are often accompanied by significant declines in tree taxa, interpreted as increasing demand for wood to supply energy for local mining and/or metallurgical operations. Periods of mining and/or smelting activity are identified during Antiquity and Modern Times, and are also confirmed by textual and field evidence. Inputs from the Rio Tinto (Southern Spain), often invoked as a major lead contributor to the European atmosphere during Roman Times, were not detected here. This remote source was probably masked by local inputs. Other mining and/or smelting phases, only suspected by archaeologists, are here identified as early as the Bronze Age. Although the durations of these phases are possibly overestimated because of detrital inputs consequent to the release of lead from polluted soils over a long period of time after major pollutant inputs, the periods at which pollution peaks occur are in good agreement with archaeological knowledge and palaeo-botanical data. The combination of geochemical and palaeo-botanical techniques with field archaeology, therefore provides a powerful tool in studying the interaction of early human societies with

  7. Restoration Potential of a Mining-Impacted Urban Stream: Horseshoe Branch of Lion Creek, Oakland, CA

    OpenAIRE

    Hackenjos, Bethany; Woelfle-Erskine, Cleo; Wood, Jacob

    2010-01-01

    Horseshoe Creek, located in the Oakland Hills of California, flows through a remnant oak and redwood forests in Horseshoe Canyon. From the 1880s through the 1930s, nearby Leona sulfur mine deposited massive tailings piles in the valleys east of Horseshoe Creek. During that time, clear-cut logging of redwoods denuded and destabilized the surrounding hillsides. Today, most of Horseshoe Creekʼs upper and middle reaches are either culverted or transformed into an engineered channel, and Merritt C...

  8. Impact loads on the pressure vessel top; Beanspruchung des Reaktordruckbehaelter-Deckelbereiches

    Energy Technology Data Exchange (ETDEWEB)

    Krieg, R.; Malmberg, T.; Messemer, G.

    1995-08-01

    A steam explosion can cause core melt to be bounced against the internal side of the RPV top. The bouncing velocity up to which the top can withstand the impact is to be determined. Plausible assumptions about a core melt mass of 80000 kg result in a tolerable maximum bouncing velocity of about 200 m/s. Reliable estimates are expected from the BERDA experiments simulating a pessimistic course of events on a 1:10 scale. (orig.)

  9. LA CHUTE DES PRIX DE PETROLE : QUELS IMPACTS POUR L’ECONOMIE TUNISIENNE ?

    OpenAIRE

    Dhaoui, Elwardi

    2015-01-01

    Oil prices have fallen by about half since September 2014. The Organization of Petroleum Exporting Countries (OPEC) decided not to reduce production. The euro zone, China, Japan and Russia recorded slower rates of economic growth than expected. All combine to keep a sharp decline of oil prices which can be persistent. This new situation has profoundly changed the economic environment of the country. The impact will vary depending on the countries if they are exporters or importers of oil. For...

  10. Impacts de l'Enherbement du Vignoble Alsacien sur le Transfert des Nitrates.

    OpenAIRE

    TOURNEBIZE , Julien

    2001-01-01

    Encadrante: Caroline GREGOIRE; The water quality of the Alsacian aquifer degrades principally because of nitrates. This pollution originates partly from the vineyard situated in the Piemont area of the Vosges massif which is a preferential zone of aquifer recharge. The main objective of the Enherbement du Vignoble Alsacien (EVA) project is to quantify the impact of an agri-environmental technique : to put grass in one out of two vine inter rows. The methodology of this work is based on the as...

  11. Impact of Gold mining activities on the water quality of the lower pra river

    International Nuclear Information System (INIS)

    Dwamena, Offei Samuel K.

    2013-07-01

    This study was conducted to assess the extent of Mercury (THg) contamination at four locations within the Shama-Mporhor Wassa catchment area of the Lower Pra River. Water, fish and sediment samples were taken twice with the longitudinal transect method at Daboase, Beposo, Bokorkope and Shama during the minor rainy season in October and at the apex of the dry season in March. Careful investigation of the Shama-Mporhor Wassa catchment area revealed that two of the locations Daboase and Beposo had been continuously impacted by the activities of Artisanal Gold miners (AGM). From the study, Total Mercury (THg) levels were found to have persisted in River water several kilometers downstream the second Artisanal Gold mining (AGM) location at Shama estuary for both seasons. Ten trace elements Mercury (Hg), Selenium (Se), Copper (Cu), Chromium (Cr), Lead (Pb), Iron (Fe), Manganese (Mn), Nickel (Ni), Zinc (Zn) and Cadmium (Cd) were determined in water, fish and sediment samples using the Atomic Absorption Spectroscopy (AAS) equipped with both Hydride Generation (HGAAS) for Selenium (Se) and Cold Vapour (CVAAS) for Total Mercury (THg). The levels of Total Mercury (THg) were largely above the WHO and USEPA guidelines for drinking water (1μg/L) and sediments (200 μg/Kg) respectively for the four locations investigated. Total Mercury (THg) exceeded the WHO, 2011 guideline value of 0.5 mg/Kg for fish species Clarias submarginatus but was below the guideline value for Xenomystus nigri. Mean concentration of Cd and Fe exceeded the WHO, 2011 guideline values for drinking water for the wet season. The other trace elements Zn, Ni, Cu, Cr, Se, Mn, and Pb had their mean concentration below the WHO, 2011 guideline values for drinking water. Apart from the mean concentration of Cd that exceeded the Canadian Interim Sediment Quality (ISQG) guideline value of 0.6 mg/Kg for the wet season, Cr, Cu, Zn, Ni and Pb were below their respective guideline values for both seasons. Statistical

  12. Subsidences and deformations above mining exploitations: mechanism and evolution; Affaissements et deformations au-dessus des exploitations minieres: mecanismes et evolution dans le temps

    Energy Technology Data Exchange (ETDEWEB)

    Piguet, J.P. [Ecole Nationale Superieure de Geologie de Nancy, 54 (France); Wojtkoviak, F. [INERIS Institut National de l' Environnement Industriel et des Risques, 60 - Verneuil en Halatte (France)

    2001-06-01

    The selection of underground mining methods (total or partial extraction, i.e. room and pillars) depends upon various geological, geometrical and geomechanical parameters. These parameters, associated to the selected mining method, determine the roof behaviour and the surface stability. In all cases, the expansion coefficient plays an important role in the consequential effect on the ground surface. In the case of total extraction, the creation of cavities in the underground leads to a modification of stresses in the surrounding rock mass, accompanied with deformations and failures on above and underlying levels. Depending upon the nature and structure of the various layers as well as of the volume of the cavities, the failures may extend more or less within the rock mass. They may even reach the surface and create a sinkhole. The paper examines this phenomenon seen from the underground (collapsing) and from the surface (subsidence). In the case of partial extraction, the pillars are sized in order to support the load of overlaying strata. However, a pillar may collapse for various reasons (creep, water rise, etc.) and an extra load is then applied to the surrounding pillars which might also collapse. (author)

  13. Interpretation of magnetic data of the Laachach gossan (central Jebilets, Morocco): mining implications; Interpretation des donnees magnetiques du chapeau de fer de Laachach (Jebilets centrales, Maroc): Implications minieres

    Energy Technology Data Exchange (ETDEWEB)

    Jaffal, M.; El Goumi, N; Hibti, M.; Adama Dairou, A.; Kchikach, A.; Manar, A.

    2010-07-01

    In the hercynian massif of Central Jebilets (Morocco), outcrop a large number of gossans which sometimes top economical orebodies (Kettara, Draa Sfar, etc.). The present study is devoted to the interpretation of magnetic data covering one of these iron hats, located near of the Laachach village, at about thirty kilometres north-westward of Marrakech. The magnetic map of Laachach highlights several anomalies which coincide with the outcrop of the gossan. Detailed analysis of reduced to the pole data allow us to conclude that these anomalies may be due to submeridian magnetic structures cut by a set of dextral transverse faults. These structures are generally dipping westward but they can be locally subvertical. The Euler deconvolution of the magnetic data gives moderately deeping solutions (22 to 254 m). The quantitative interpretation of the two principal magnetic anomalies highlighted in the study area lead to better characterising of the deep structure of the Laachach magnetic bodies, that may correspond to massive sulphide occurrences, according to the geological and mining context of the study area. The two modelled bodies constitute priority recognition targets for any mining exploration program to be carried out on the Laachach site. (Author).

  14. The impact of mining on the environment: necessary evil or merely a calamity?

    International Nuclear Information System (INIS)

    Filho, E.R.

    1994-01-01

    Mankind has always used mineral assets and has become increasingly dependent upon them during his cultural, scientific and technological evolution. If it is true that mining is one of the ways in which man interferes with the environment by disfiguring, degrading and polluting it, it is no less true that mining is one of the ways to supply the needs indispensable to modern societies. For an unpredictable period of time to come, mankind will have to live with the consumption of metallic and non-metallic mineral and energy resources. It is impossible to sustain the unsustainable, to renew the non-renewable, but it is perfectly possible to make rationally executed mining compatible with the recovery and/or restoration of the environment. In developing countries like Brazil, politicians and business people, poorly-informed about environmental problems, usually try, without success, to solve the problems far away from metropolitan areas, for example in the Amazon region, forgetting about those problems close to home which make life intolerable in the great urban centres like Rio de Janeiro, Sao Paulo and Belo Horizonte. 10 refs

  15. Impact of uranium mining activity on cave deposit (stalagmite) and pine trees (S-Hungary)

    Science.gov (United States)

    Siklosy, Z.; Kern, Z.; Demeny, A.; Pilet, S.; Leel-Ossy, Sz.; Lin, K.; Shen, C.-C.; Szeles, E.

    2009-04-01

    Speleothems are well known paleoclimate archives but their potential for monitoring environmental pollution has not been fully explored. This study deals with an actively growing stalagmite whose trace-element concentration suggests anthropogenic contamination, rather then natural forcing. Paralell, as a potential independent chemo-enviromental archive, living pine (Pinus sylvestis) trees were also involved into investigation. U production in S-Hungary started in 1957 and was expanded closer to the cave site in 1965, covering a mining plot area of ca. 65 km2. The deep-level ore production ended in 1997 and remediation of the mine site has since been completed. Our objective was to determine the possible effect of the four-decade-long uranium (U) ore mining activity on the environment, as recorded by a cave deposit and the pine trees. The Trio Cave is located in the Mecsek Mts (S-Hungary), ca. 1.5-3 km east from the nearest air-shaft and entrance of the uranium mine. A stalagmite located about 150 m away from the cave entrance was drilled and the core investigated for stable isotope and trace element compositions. Pine trees were sampled by increment borer. Continuous flow mass spectrometry was applied on carbonate samples and laser ablation ICP-MS was applied for trace element analysis of both stalagmite (Siklosy et al., 2009) and pine samples. The youngest 1 cm of the drill core was selected for this study that may represent the last cca. 100 years (based on MC-ICP-MS age dating of older parts of the core) that covers the uranium mining period. The pre-mining period is characterized by systematic co-variations of trace elements (U, P, Si, Al, Ba, Mg, etc.) that can be related to soil activity and precipitation amount. The youngest 1.3 mm, however, records a sudden change in U content uncorrelated with any other variables. Starting from a background value of 0.2-0.3 ppm, the concentration gradually increases to about 2 ppm (within about 1 mm), remains constant for

  16. Preliminary evaluations of social and environmental impacts from mine-industrial project - uranium of Lagoa Real, Bahia, Brazil

    International Nuclear Information System (INIS)

    Negrao, F.I.; Oliveira, G.G. de; Zanetti, J.C.; Cunha, R.P.P. da.

    1990-01-01

    The Uranium Province of Lagoa Real is situated in the central south of the State of Bahia and constitutes at the moment the second uranium resource of Brazil, containing, in several anomalies, as available resource, 93.850 ton. of U sub(3) O sub(8). The Uranio do Brasil S.A. develops a mine-industrial complex in this Province with the aim to extract and benefit uranium and intending to improve in 1992. The project is considered with high hazard, because involves te management of radioactive material, and becomes necessary an available of environmental impact, in accordance with CONAMA 001/86 and an active participation of the society. This paper aims to indentify the social and environmental impacts of this process, as a contribution of this important discussion. (author)

  17. L'impact de Quizlet sur la dynamique motivationnelle des élèves lors de l'apprentissage du vocabulaire allemand

    OpenAIRE

    André, Joanne; Berrio, Lucas; Pellet, Jean-Philippe

    2017-01-01

    Pour ce travail, nous nous sommes intéressés à l'effet que pouvait avoir les TIC sur la motivation des élèves. Nous nous sommes penchés sur la plate-forme web Quizlet qui propose différents outils pour réviser un contenu préalablement défini par l'enseignant. Ainsi, nous avons dirigé notre recherche sur l'impact de Quizlet sur la dynamique motivationnelle des élèves dans le cadre de l'apprentissage du vocabulaire allemand. Nous comparons cette méthode d'apprentissage avec les méthodes dites t...

  18. Remote sensing for investigations of woodlands impacted by lignite open surface mines

    Energy Technology Data Exchange (ETDEWEB)

    Pilarski, M. [ILV-Fernerkundung GmbH, Teltow (Germany); Lohstraeter, O. [Abteilung Markscheidewesen, MIBRAG mbH, Theissen (Germany)

    2005-02-01

    The development of a long term monitoring concept for post-mining landscapes and mine surroundings as ordered by the company MIBRAG requires different preliminary studies. Objectives of these methodologically oriented analyses presented were the recording of ecologically relevant parameters, their changes and of possible effects caused by the mining activities in the flood plains of 'Weisse Elster' and 'Schnauder' situated between the open surface lignite mines 'Vereinigtes Schleenhain' and 'Profen' south of Leipzig. Besides other information, repeatedly generated satellite data of the SPOT system was prepared for research of various vegetation types, selected by certain criteria for a long term monitoring. The satellite data analysis methodology and research findings are presented. The generation of radiometrical and comparable data records using the atmosphere correction software 'ATCOR' as part of the image processing system 'ERDAS IMAGINE' and the evaluation of the Normalised Difference Vegetation Index NDVI are important parts of the analysis. Based on deciduous woodland maps near the rivers of 'Weisse Elster' and 'Schnauder', which were categorised as ecologically valuable, statistical analyses were made using the vegetation status evaluated by remote sensing. As a result, tendencies of vegetation change are demonstrated. To obtain more details about special relations between vegetation development and remote sensing data, further research is necessary involving spectral features of deciduous plant canopy and their causalities. Future gathering of high-precision geometric and radiometric (digital airborne) data is one way of reaching more detailed information of the objects in question. The high geometric accuracy of digital camera data (by DMC) and the color bands are benefits for the mining company which can now replace regular air-borne surveying made with analogous technology

  19. Wastes behavior and environmental impacts, researches and methods; Comportement des dechets et impacts environnementaux, recherches et methodes

    Energy Technology Data Exchange (ETDEWEB)

    Labeyrie, J; Chateau, L [Agence de l' Environnement et de la Maitrise de l' Energie, (ADEME), 49 - Angers (France); Gin, St [CEA/VALRHO - site de Marcoule, Dept. de Recherche en Retraitement et en Vitrification DRRV, 30 - Marcoule (France); and others

    2001-07-01

    The wastes management policy takes into account more and more often the environmental impacts mastership. This evolution is particularly appreciable when the wastes directly interact with the environment: storage, utilization for roads construction and so on. In this context the ADEME organized the 8 june 2000 a colloquium to present the new evaluation methods and tools, to describe the regulations and to identify the research programs needed for this environmental policy. Eleven papers are presented. (A.L.B.)

  20. La revolution des savants

    CERN Document Server

    Chavanne, A

    1989-01-01

    Premiere cassette : - 1666 : impact de la creation de l'Academie des Sciences par Colbert, trente ans apres le proces de Galile, et au moment des disparitions de Pascal, Descartes et Fermat. Elle dirigee par le hollandais Huyggens jusqu'a sa fuite de France au moment de la revocation de l'Edit de Nantes. - 1750 : l'Encyclopedie (ou "Dictionnaire raisonne des Sciences, des Arts et des Metiers") de Diderot et d'Alembert, soutenus par Malherbes, Buffon, Condorcet et Rousseau. - 1789 : Revolution francaise. - 8 aout 1793 : l'Assemblee, par une declaration de Marat, dissout l'Academie des Sciences. Celle-ci continue cependant ses travaux pour les poids et mesures jusqu'en 1795. - la Terreur : la condamnation a mort, pas au nom d'une "Revolution qui n'a pas besoin de savants" mais pour d'autres raisons, de trois grands hommes de science : Lavoisier, Bailly et Condorcet. - 1793-1794 : Au printemps 93, le Comite de Salut Publique s'inquiete du demi-million de soldats etrangers de toutes les pays frontaliers qui essai...