Assessing man-induced environmental changes in the Sepetiba Bay (Southeastern Brazil) with geochemical and satellite data

被引：40
作者：
Araujo, Daniel Ferreira [1 ,2 ,3 ]
Peres, Lucas G. M. [4 ]
Yepez, Santiago [2 ]
Mulholland, Daniel S. [5 ]
Machado, Wilson [6 ]
Tonha, Myller [1 ]
Garnier, Jeremie [1 ,2 ,3 ]
机构：
[1] Univ Brasilia, Inst Geociencias, Campus Darcy Ribeiro,L2, BR-70910900 Brasilia, DF, Brazil
[2] Univ Paul Sabatier, IRD, Geosci Environm Toulouse, GET UMR CNRS 5563, 14 Rue Edouard Belin, F-31400 Toulouse, France
[3] Univ Brasilia, LMI OCE, IRD, Campus Darcy Ribeiro, BR-70910900 Brasilia, DF, Brazil
[4] Univ Brasilia, Inst Geog, Lab LAGAS, Campus Darcy Ribeiro L2, BR-70910900 Brasilia, DF, Brazil
[5] Univ Fed Tocantins, Dept Quim Ambiental, Rua Badejos,Lote 7,Chacaras 69-72, BR-77402970 Gurupi, Tocantins, Brazil
[6] Univ Fed Fluminense, Dept Geoquim, Campus Valonguinho, BR-24210510 Niteroi, RJ, Brazil
来源：
COMPTES RENDUS GEOSCIENCE | 2017年 / 349卷 / 6-7期
关键词：
Estuarine pollution; Metal contamination; Biogeochemical processes; Coastal zone; Applied geochemistry; NEUTRON-ACTIVATION ANALYSIS; MANGROVE SEDIMENTS; SE BRAZIL; METAL CONCENTRATIONS; TRACE-METALS; CONTAMINATION; ECOSYSTEMS; MANGANESE; ESTUARY; BASIN;
D O I：
10.1016/j.crte.2017.09.007
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The Sepetiba Bay, Southeastern Brazil, has undergone intense environmental changes due to anthropogenic influence. This work aims to: (i) evaluate the changes in the drainage landscape use over the last decades, (ii) identify new and past punctual and diffuse anthropogenic sources and assess risks of man-induced disturbances of the coastal zones of Sepetiba. A multivariate statistics approach on the sediment's elemental geochemical dataset discriminated three groups: the electroplating waste-affected elements (As, Cd, Pb, Cu and Zn), terrigenous elements (Si, K, Ti, Al and Fe), and biogenic and carbonatederived elements (Ca, Mg, Mn, P, Ni, and Cr). Sediment core profiles of trace elements evidence records of former environmental impacts from old metallurgical wastes. Analysis of two Landsat images from 30 years ago and 2015 reveals a decrease in the mangrove area of nearly 26%. The ongoing suppression of mangroves could enhance the release of trace elements into the Sepetiba Bay, increasing the risks to human and biota health. (C) 2017 Published by Elsevier Masson SAS on behalf of Academie des sciences.
引用
收藏
页码：290 / 298
页数：9
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