Composição química das águas pluviais e deposição atmosférica anual na bacia do Alto Sorocaba (SP)

Química Nova

Fabiano Tomazini Da Conceição²  Diego De Souza Sardinha²  Guillermo Rafael Beltran Navarro²  Maria Lúcia Pereira Antunes¹  Vivian Andréa Angelucci¹ 

[1] ,Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas Departamento de Planejamento Territoral e GeoprocessamentoRio Claro SP ,Brasil

关键词: watershed;    ionic composition;    air pollution;   

DOI  :  10.1590/S0100-40422011000400011

来源: SciELO

【 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 SO4(2-)>HCO3->NO 3->Cl- >PO4(3-) 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 (SO4(2-)) and agriculture activities (K+, NO3- and PO4(3-)).

【 授权许可】

CC BY-NC   
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