Natural and anthropogenic emissions of metals and nutrients to the lower contas river basin, Bahia state, Brazil

Química Nova

Marins, Rozane V.¹  Universidade Estadual de Santa Cruz, Ilhéus, Brasil¹  Ovalle, Álvaro R. C.¹  Aguiar, José E.¹  Falcão Filho, Cézar A. T.¹  Lacerda, Luiz Drude de¹  Paula, Francisco C. F. de¹  Universidade Federal do Ceará, Fortaleza, Brasil¹  Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, Brasil¹ 

关键词: emission factors;    pollutants;    Rio de Contas estuary.;   

DOI  :  10.1590/S0100-40422010000100014

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown