Chronology of anthropogenic impacts reconstructed from sediment records of trace metals and Pb isotopes in Todos os Santos Bay (NE Brazil)

MARINE POLLUTION BULLETIN

卷:125

Article

Andrade, R. L. B.¹  Hatje, V.¹  Masque, P.^2,3,4,5  Zurbrick, C. M.⁶  Boyle, E. A.⁶  Santos, W. P. C.⁷ 

[1] Univ Fed Bahia, Inst Quim, Ctr Interdisciplinar Energia & Ambiente CIENAM, Rua Barao de Jeremoabo S-N, BR-40170290 Salvador, BA, Brazil

[2] Edith Cowan Univ, Sch Sci, Ctr Marine Ecosyst Res, Joondalup, WA 602Z, Australia

[3] Univ Autonoma Barcelona, Dept Fis, Inst Ciencia & Tecnol Ambientals, Bellaterra 08193, Spain

[4] Univ Western Australia, Oceans Inst, Crawley, WA 6009, Australia

[5] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia

[6] MIT, EAPS, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[7] Inst Fed Bahia, Dept Quim DAQ SSA, BR-40301015 Salvador, BA, Brazil

关键词: Contamination;    Sediment pollution record;    Trace elements;    Pb isotopes;    Sedimentation rates;    Todos os Santos Bay;   

DOI  :  10.1016/j.marpolbul.2017.07.053

来源: Elsevier

【 摘 要 】

The evolution of the impacts of anthropogenic activities in Todos os Santos Bay was evaluated by profiles of trace metals and Pb isotopes determined in sediment cores. Fluxes of metals increased up to 12, 4 and 2 times for Cu, Pb, and Zn, respectively, compared to those recorded in the beginning of the 20th century. Stable Pb isotopes identified a decommissioned lead smelter and burning of fossil fuels as the main sources of Pb. Most metals showed minor to moderate enrichment factors (EF < 4), but Cu and Pb were highly enriched (EF = 28 and 6, respectively) at the Aratu harbor. Temporal changes in sediments were associated to different activities, namely Pb smelting, burning of fossil fuels, maritime traffic, petroleum related activities, inputs of domestic effluents, and changes in land uses. The effects of the implementation of environmental policies to improve the waters of the bay could not be identified in the evaluated cores.

【 授权许可】

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