Rainwater chemical composition and annual atmospheric deposition at Alto Sorocaba basin (SP)

Química Nova

Sardinha, Diego de Souza¹  Conceição, Fabiano Tomazini da¹  Universidade Estadual Paulista, Sorocaba, Brasil¹  Navarro, Guillermo Rafael Beltran¹  Universidade Estadual Paulista, Rio Claro, Brasil¹  Antunes, Maria Lúcia Pereira¹  Angelucci, Vivian Andréa¹ 

关键词: watershed;    ionic composition;    air pollution.;   

DOI  :  10.1590/S0100-40422011000400011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Two sampling points were chosen and forty samples were collected between January and December 2006 at Alto Sorocaba basin. The rainwater pH varied from 5.46 to 6.36 (Ibiúna) and 5.26 to 6.81 (Itupararanga), being Ca2+ the main ion responsible for controlling the rainwater pH. The ionic concentrations decreased in the following order: Ca2 +>Na+> Mg2+>K+ for cations and SO42->HCO3->NO 3->Cl- >PO43- for anions. The annual atmospheric deposition appeared to be controlled mostly by following sources: mining activities and cement factories (Ca2+ and HCO3-), natural soil dust (Na+, Mg2+ and HCO3-), fossil fuel burning (SO42-) and agriculture activities (K+, NO3- and PO43-).

【 授权许可】

Unknown