Sample records for scavenging atmospheric

Sample records 1 - 2 shown.


Uma análise do coeficiente de remoção de poluentes em função do espectro de gotas de chuva em diferentes localidades no Brasil e Alemanha/ An analysis of pollutant scavenging coefficient in function of drop size distributions from different localities in Germany and Brazil

Gonçalves, Fábio Luiz Teixeira; Massambani, Oswaldo

Resumo em inglês The pollutant transference among reservoirs atmosphere-hydrosphere, relevant to the atmospheric chemistry, depends upon scavenging coefficient (Λ) calculus, which depends on the raindrop size distribution as well as on the rainfall systems, both different to each locality. In this work, the Λ calculus will be evaluated to gas SO2 and particulate matter fine and coarse among five sites in Germany and two in Brazil. The results show three possible classifications (mais) in function of Λ, comparable to literature, however with a greater range due to the differences of rainfall system sites. This preliminary study supports future researches

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Composição química da chuva e aporte atmosférico na Ilha Grande, RJ/ Rainwater chemistry and atmospheric deposition at Ilha Grande, RJ

Souza, Patricia Alexandre de; Mello, William Zamboni de; Maldonado, Juan; Evangelista, Heitor

Resumo em inglês Wet (n = 21) and dry (n = 23) deposition samples were collected from March to September 2002 at the southern coast of Ilha Grande. Rainwater pH varied from 4.3 to 6.3 and ionic concentrations (in µmol L-1) decreased in the order Cl- > Na+ > Mg2+ > SO4(2-) > NO3- ~ NH4+ > K+ ~ H+ > Ca2+. Scavenging of sea-salt aerosols was the major source of Cl-, Na+, Mg2+, and Ca2+. Half of total SO4(2-) was non-sea-salt SO4(2-). Total deposition fluxes of NH4+, NO3-, and non-sea-salt SO4(2-) were respectively 9.3, 17.8, and 16.0 mol ha-1 month-1.

Scientific Electronic Library Online (Portuguese)