期刊
MARINE POLLUTION BULLETIN
卷 68, 期 1-2, 页码 55-63出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2012.12.023
关键词
Metals; Bioavailability; Mobility; SEM/AVS; Attenuation; Sepetiba Bay
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- CNPq [305241/2003-6]
This study proposes a new methodology to study contamination, bioavailability and mobility of metals (Cd, Cu, Ni, Pb, and Zn) using chemical and geostatistics approaches in marine sediments of Sepetiba Bay (SE Brazil). The chemical model of SEM (simultaneously extracted metals)/AVS (acid volatile sulfides) ratio uses a technique of cold acid extraction of metals to evaluate their bioavailability, and the geostatistical model of attenuation of concentrations estimates the mobility of metals. By coupling the two it was observed that Sepetiba Port, the urban area of Sepetiba and the riverine discharges may constitute potential sources of metals to Sepetiba Bay. The metals are concentrated in the NE area of the bay, where they tend to have their lowest mobility, as shown by the attenuation model, and are not bioavailable, as they tend to associate with sulfide and organic matter originated in the mangrove forests of nearby Guaratiba area. (C) 2013 Elsevier Ltd. All rights reserved.
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