Properties and environmental quality of the overburden and tailings of manganese mining in the Eastern Amazon.

Autor: Nahum ABR; Universidade Federal Rural da Amazônia, Belém, Pará, Brazil., Pereira WVDS; Universidade Federal Rural da Amazônia, Belém, Pará, Brazil; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Martins GC; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Dias YN; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Ribeiro PG; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Salomão GN; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Gastauer M; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Caldeira CF; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Fernandes AR; Universidade Federal Rural da Amazônia, Belém, Pará, Brazil., Souza ES; Universidade Federal do Sul e Sudeste do Pará, São Felix do Xingu, Pará, Brazil., Dall'Agnol R; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil., Ramos SJ; Instituto Tecnológico Vale - Desenvolvimento Sustentável, Belém, Pará, Brazil. Electronic address: silvio.ramos@itv.org.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Sep 10; Vol. 262 (Pt 2), pp. 119965. Date of Electronic Publication: 2024 Sep 10.
DOI: 10.1016/j.envres.2024.119965
Abstrakt: Knowledge about the characteristics of overburden and tailings from manganese (Mn) mining is essential for defining their levels of potentially toxic elements (PTEs) and appropriate environmental management. This study aimed to assess the total and bioavailable contents of PTEs in Mn mining areas in the Eastern Amazon, as well as the associated environmental risks. The samples were collected in areas of overburden and tailings deposition, in addition to forest soils in the Azul mine, Carajás Mineral Province, Brazil. These samples were characterized in terms of fertility, granulometry, and total and bioavailable PTE contents. The pH values of the forest soil were more acidic than those of the overburden and tailings, and the organic matter contents were considerably higher in the forest soil. All PTEs, especially Mn, Ba, Cu, Zn, and Pb, presented higher contents in the overburden and tailings. However, chemical fractionation revealed that PTEs were predominantly in the residual fraction, with percentage contents above 60% of the total content. These results suggest a low risk of environmental contamination. The findings of this study may support more efficient environmental rehabilitation in Mn mining areas in the Amazon.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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