Emissões naturais e antrópicas de metais e nutrientes para a bacia inferior do rio de contas, Bahia

• Autor(a) principal: Paula,Francisco C. F. de
• Data de Publicação: 2010
• Outros Autores: Lacerda,Luiz Drude de, Marins,Rozane V., Aguiar,José E., Ovalle,Álvaro R. C., Falcão Filho,Cézar A. T.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Química Nova (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000100014
• topic: emission factors; pollutants; Rio de Contas estuary

Emission factors of anthropogenic activities and natural processes were used to estimate nutrients and metals loads to the Contas River lower basin, Southern Bahia, Brazil. Among natural sources, emission from soil leaching is larger for N, Cu and Pb. Atmospheric deposition is the major natural source of P, Zn, Cd and Hg. Among anthropogenic sources, agriculture is the major source of N, Cu and P. Urban sources are the major contributors to the other elements. Present anthropogenic land uses are already responsible for 78 and 99% of total N and P loads and about 50% of total Cu and Hg.