Sample records for CRISENO (chrysene)
from WorldWideScience.org

Sample records 1 - 3 shown.



1

Colémbolos (Hexapoda) como bioindicadores de la calidad de suelos contaminados con hidrocarburos en el sureste de México/ Collembola (Hexapoda) as quality bioindicators of the hydrocarburans polluted soils in Southestern Mexico

Uribe-Hernández, Raúl; Juárez-Méndez, Carlos H.; Montes de Oca, Marco A.; Palacios-Vargas, José G.; Cutz-Pool, Leopoldo; Mejía-Recarmier, Blanca E.
2010-04-01

Resumen en español Se evaluaron invertebrados del suelo, en particular los colémbolos, como bioindicadores de la calidad de suelos contaminados con hidrocarburos en el sureste de México. Se realizaron 2 muestreos en verano-otoño del 2004, en 4 parcelas de 2 hectáreas, denominadas zona 1, 2, 3 y control. De cada unidad se tomaron 8 muestras que fueron procesadas por medio del embudo de Berlese-Tullgren y 4 por el método de flotación. Para colémbolos se determinaron los siguientes índ (mas) ices ecológicos: abundancia, riqueza, índice de Shannon (H'), dominancia (λ), equidad(J') e índice de similitud (S). Se realizaron análisis fisicoquímicos del suelo: hidrocarburos totales del petróleo (HTP) e hidrocarburos aromáticos policíclicos (HAP), porosidad, pH, CE, MO, N, P, K, CIC y textura. Los HTP, en las zonas contaminadas, sobrepasan los límites de las normas mexicanas ambientales. En todas las zonas de estudio se observaron colémbolos, ácaros y larvas de dípteros, por lo que su abundancia y diversidad pueden ser utilizadas como bioindicadores del grado de contaminación y calidad del suelo. En las zonas contaminadas se registraron abundancias muy bajas de Crustacea, Formicidae, Araneae, Diptera, Pseudoscorpionida, y Diplopoda. Las familias de los colémbolos más ampliamente distribuidas fueron Sminthurididae e Isotomidae. De acuerdo con el análisis de correlación, su diversidad de colémbolos es afectada por la presencia de HAP (flouranteno, naftaleno, pireno, criseno y fenantreno) Resumen en inglés We evaluated invertebrates, with an emphasis on Collembola, as bioindicators of soil quality in hydrocarbon-contaminated soils in southeastern Mexico. We carried out 2 sampling periods in summer-fall of 2004 in 4 parcels of 2 hectares each. From each parcel we processed 8 samples using the Berlese-Tullgren funnel technique and 4 using the flotation method. For Collembola we calculated the following ecological indices: abundance, richness, the Shannon index (H'), dominance (mas) (λ), equitativity (J') and the similarity index (S). We also performed the following soil analyses: total petroleum hydrocarbon content (HTP), polycyclic aromatic hydrocarbon content (HAP), porosity, pH, CE, MO, N, P, K, CIC, and texture. In contaminated areas, HTP exceeded the safe limits sets by Mexican environmental legislation. In all studied areas we observed Collembola, mites, and dipteran larvae. The variation in abundance and diversity of these insects can be used as biondicators of the level of contamination and quality of the soil. We found very low abundances of Crustacea, Formicidae, Aranae, Diptera, Pseudoscopionida, and Diplopoda. The Collembola families that were most widely distributed were Sminthurididae and Isotomidae. Our correlation analysis showed that their diversity is affected by HAP level (fluoranthene, naphfhalene, pyrene, chrysene and phenanthrene).

Scientific Electronic Library Online (Spanish)

2

Electrobioremediation of an unsaturated soil contaminated with hydrocarbon after landfarming treatment

Acuña, A.J.; Tonin, N.; Pucci, G.N.; Wick, L.; Pucci, O.H.
2010-01-01

Resumen en inglés The electro-bioremediation is a technique that is used for the remediation of hydrocarbon contaminated soils. The aim of this study is to explore the electro-bioremediation of an unsaturated soil, contaminated with hydrocarbon waste generated by the oil industry activity in the area and previously remediated by landfarming, to in order to increase the removal of polyaromatic hydrocarbons. The sample was put in a three-compartment electro-bioremediation glass cell of 58 cm (mas) long, the lateral compartments containing the electrolyte; we used bridges of ammonium phosphate to connect the electrolyte with the soil sample in the central compartment. A potential difference of 0.5 V cm-1 was applied to the electro-bioremediation cells for 60 days. A second cell was used for control and no current was applied to it. The monitoring was carried out by a counting cell and measuring of n-alkanes and polyaromatic hydrocarbons using GC mass. The results showed that this technology has good potential to increase the biodegradation of n-alkane hydrocarbons and polyaromatic hydrocarbons such as phenanthrene, 1-3-metilphenanthrene, chrysene, 3-methylchrysene, 6-methylchrysene, benzo(b)fluoranthrene and benzo(ghi)pyrene which, without the application of direct current, were not biodegraded by microorganisms in the soil. The use of salt bridges maintained the pH between values that are compatible with the degrading bacterial community.

Scientific Electronic Library Online (Spanish)

3

Caracterización de hidrocarburos en sedimentos de la Ría de Laxe y su relación con el vertido del Prestige (NO de la Península Ibérica)

Blanco, C. G.; Prego Reboredo, Ricardo Francisco J.; Azpiroz, M. D. G.; Fernández Domínguez, Isabel
2006-01-01

Digital.CSIC (Spain)