Composição química da chuva e aporte atmosférico na Ilha Grande, RJ

Química Nova

Patricia Alexandre De Souza²  William Zamboni De Mello²  Juan Maldonado²  Heitor Evangelista¹ 

[1] ,Universidade Federal Fluminense Instituto de Química Departamento de GeoquímicaNiterói RJ ,Brasil

关键词: wet deposition;    dry deposition;    air pollution;   

DOI  :  10.1590/S0100-40422006000300013

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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