Metals and organic matter baselines in sediments in a cross-shelf gradient at Abrolhos Bank, SW Atlantic.

Autor: Gama IH; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Almeida MG; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Rangel TP; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Marques JSJ; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Oliveira BCV; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Araújo BF; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Gatts PV; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil., Francini-Filho RB; Centro de Biologia Marinha, Universidade de São Paulo, 11612-109 São Sebastião, SP, Brazil., Thompson F; Universidade Federal do Rio de Janeiro, 21941-901 Rio de Janeiro, RJ, Brazil., Rezende CE; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-600 Campos dos Goytacazes, RJ, Brazil. Electronic address: crezende@uenf.br.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2022 Jan 01; Vol. 802, pp. 149867. Date of Electronic Publication: 2021 Aug 24.
DOI: 10.1016/j.scitotenv.2021.149867
Abstrakt: The present study performed geochemical fractioning of major and minor elements in a cross-shelf gradient of the Abrolhos Bank, where the largest and most diverse coral reefs in the South Atlantic are concentrated. The fractioning was performed using sequential extractions to determine the degree of availability and toxicity of the elements. The mobility pattern of the elements investigated were in the following order: Ca > Mn > Pb > Cr > Zn > Fe > V > Cu > Ba>Al > Ni > Ti. For elements, such as (Ti, Ni, Al, Ba, Cu, V, Fe, Zn, Cr, Pb), the highest concentrations were in the residual phase at some sampling sites. As established by Environment Canada (Threshold Effect Level - TEL and Probable Effect Level - PEL), Ba, Cr, and Ni produced values higher than the limits, associated with higher concentrations of other elements. In addition, significant proportions of these elements were found in mobile phases in the same sites. Thus, more rigorous measures are critical to avoid alarming levels of chronic environmental pollution inside and outside protected areas of the region. To enhance the sustainability of the region, more effective enforcement is crucial to prevent anthropic contamination that may threaten its biodiversity. The results provide the baseline for future studies regarding the potential impacts of the breach of the tailings dam in the region of Mariana, Minas Gerais.
Competing Interests: Declaration of competing interest The authors declare no competing financial interest.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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