Anthropogenic Influences on Annual Flux of Cations and Anions at Meio Stream Basin, So Paulo State, Brazil

Autor(es)

Conceicao, F. T. ^[1] ; Sardinha, D. S. ^[2] ; Souza, A. D. G. ^[3] ; Navarro, G. R. B. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Dept Environm Engn, BR-18087180 Sao Paulo - Brazil

^[2] Univ Estadual Paulista, Inst Geosci & Exact Sci IGCE, BR-13506900 Sao Paulo - Brazil

^[3] Fac COC, Dept Environm Engn, BR-14096160 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: WATER AIR AND SOIL POLLUTION; v. 205, n. 1-4, p. 79-91, JAN 2010.
• Citações Web of Science: 6

Resumo

The chemical dynamics at Meio Stream Basin, So Paulo State, Brazil were evaluated using major elements as natural tracers. The surface water samples from Meio Stream were collected near the mouth of Meio Stream at the confluence with the Mogi-Gua double dagger u River on February 25, 2005, April 20, 2005, and July 8, 2005. Rainwater samples were collected (using a ``bulk{''} collector) for 1 year at one sampling point located about 4 km from downtown Leme city and other possible sources of contamination. The analyses were performed by pH, temperature, dissolved oxygen, electrical conductivity, total solids, sulfate, nitrate, phosphate, alkalinity, chloride, sodium, calcium, potassium, and magnesium. This basin has serious environmental problems in terms of rainwater and surface water quality, which result in the negative annual flux of cations and anions at Meio Stream Basin, with the exception of chlorine. The Meio Stream, downstream from Leme city, receives several elements/compounds through anthropogenic activities, mainly related to the discharge of domestic effluents. Anthropogenic inputs (mining, fossil fuel burning, and agricultural activities) are responsible for the higher concentrations of cations and anions in the rainwater from this basin. (AU)

• Processo FAPESP: 05/59203-1 - Avaliação das taxas de alteração e geocronologia dos perfis supérgenos de Tapira (MG) e Catalão (GO)
• Beneficiário: Fabiano Tomazini da Conceição
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores