Total mercury distribution as a proxy of urban and industrial pollition along the brazilian coast

Química Nova

Marins, Rozane V.¹  Marques, Wanessa Sousa¹  Maia, Saulo Robério Rodrigues¹  Lacerda, Luiz Drude de¹  Universidade Federal do Ceará, Fortaleza¹  Universidade Federal Fluminense, Niterói¹  Paula Filho, Francisco José de¹ 

关键词: environmental proxy;    mercury;    geo-accumulation index;   

DOI  :  10.1590/S0100-40422004000500016

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The monitoring of the pollution status of the Brazilian coast is hampered by the lack of a consistent environmental indicator. We propose Hg as an environmental proxy to anthropogenic pollution of coastal regions due to its absence in the Brazilian geology, its ubiquity in anthropogenic effluents, and its toxicity. Available data suggest Hg "backgrounds" in coastal sediments of 1-10 ng g-1, in the East and 15-30 ng g-1 in the South. We suggest short sediment cores to establish these values estimating a geo-accumulation index to compare all areas. The distribution of index values showed the majority of southern coast at least moderately contaminated whereas many eastern areas are still pristine.

【 授权许可】

Unknown