期刊
MARINE POLLUTION BULLETIN
卷 109, 期 1, 页码 435-445出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.05.030
关键词
Geo-accumulation index; Enrichment factor; Heavy metals; Southeast Atlantic; Brazil
资金
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ) [E26/111.190/2011]
Surface sediments were collected from Guanabara Bay, at 14 stations distributed in five sectors, over three sampling campaigns. Analyses of metals, grain size fractions and total organic carbon analyses were performed. The geo-accumulation index and the enrichment factor were estimated to assess contamination status based on background values. Additionally, the sediment quality guidelines were applied to evaluate the adverse biological effects. Results show that there was no seasonal variation in sediment quality based on any methodology, and all methods utilized showed that NW sector and HRJ sector were the worst affected and that the NE sector had the best conditions. The sediments of GB are polluted mainly by Cr, Pb and Zn. According to Sigma SEM/AVS, these metals are not available to the biota, although toxicity tests dispute this. Among the various methods employed, those using background values for the area seem to best reflect the local historical contamination. (C) 2016 Elsevier Ltd. All rights reserved.
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