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

Quimica nova

Falcão Filho, Cézar A. T.¹  Paula, Francisco C. F. de¹  Ovalle, Álvaro R. C.²  Marins, Rozane V.³  Aguiar, José E.³  Lacerda, Luiz Drude de³ 

[1] Universidade Estadual de Santa Cruz, Ilhéus, Brasil;Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, Brasil;Universidade Federal do Ceará, Fortaleza, Brasil

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

【 授权许可】

CC BY