Rainwater chemistry and atmospheric deposition at Ilha Grande, RJ

Química Nova

Universidade Federal Fluminense, Niterói, Brasil¹  Maldonado, Juan¹  Universidade Estadual do Rio de Janeiro, Rio de Janeiro, Brasil¹  Mello, William Zamboni de¹  Souza, Patricia Alexandre de¹  Evangelista, Heitor¹ 

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

DOI  :  10.1590/S0100-40422006000300013

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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+ > SO42- > NO3- ~ NH4+ > K+ ~ H+ > Ca2+. Scavenging of sea-salt aerosols was the major source of Cl-, Na+, Mg2+, and Ca2+. Half of total SO42- was non-sea-salt SO42-. Total deposition fluxes of NH4+, NO3-, and non-sea-salt SO42- were respectively 9.3, 17.8, and 16.0 mol ha-1 month-1.

【 授权许可】

Unknown