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

Quimica nova

Lacerda, Luiz Drude de¹  Marins, Rozane V.²  Marques, Wanessa Sousa²  Maia, Saulo Robério Rodrigues²  Paula Filho, Francisco José de² 

[1]Universidade Federal Fluminense, Niterói

[2]Universidade Federal do Ceará, Fortaleza

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 theBrazilian coast is hampered by the lack of a consistent environmental indicator.We propose Hg as an environmental proxy to anthropogenic pollution of coastalregions due to its absence in the Brazilian geology, its ubiquity in anthropogeniceffluents, 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-1in the South. We suggest short sediment cores to establish these values estimatinga geo-accumulation index to compare all areas. The distribution of index valuesshowed the majority of southern coast at least moderately contaminated whereasmany eastern areas are still pristine.

【 授权许可】

CC BY