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

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Author(s)
Andrade, R.L.B.
•
Hatje, V.
•
Masqué, P.
•
Zurbrick, Cheryl M
•
Boyle, Edward A
•
Santos, W.P.C.
Alternative Title
Chronology of anthropogenic impacts reconstructed from sediment records of trace metals and Pb isotopes in Todos os Santos Bay (NE Brazil)
Date Issued
December 2017
Journal
Marine Pollution Bulletin
Publisher
Elsevier BV
Citation
Andrade, R. L. B. et al. "Chronology of anthropogenic impacts reconstructed from sediment records of trace metals and Pb isotopes in Todos os Santos Bay (NE Brazil)." Marine Pollution Bulletin 125, 1-2 (December 2017): 459-471 © 2017 Elsevier
Version
Original manuscript
Abstract
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. Keywords: Contamination; Sediment pollution record; Trace elements; Pb isotopes; Sedimentation rates; Todos os Santos Bay
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.marpolbul.2017.07.053
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