Geochemical mapping and reference values of potentially toxic elements in a contaminated mining region : upper velhas river basin stream sediments, Iron Quadrangle, Brazil.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorCosta, Raphael de Vicq Ferreira da-
Autor(es): dc.creatorLeite, Mariangela Garcia Praça-
Autor(es): dc.creatorLeão, Lucas Pereira-
Autor(es): dc.creatorNalini Júnior, Hermínio Arias-
Autor(es): dc.creatorValente, Teresa-
Data de aceite: dc.date.accessioned2025-08-21T15:04:51Z-
Data de disponibilização: dc.date.available2025-08-21T15:04:51Z-
Data de envio: dc.date.issued2024-09-11-
Data de envio: dc.date.issued2024-09-11-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/18575-
Fonte completa do material: dc.identifierhttps://doi.org/10.3390/min13121545-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1002068-
Descrição: dc.descriptionThe Upper Velhas River Basin, in the mining region of the Iron Quadrangle, is one of the most polluted basins in Minas Gerais, Brazil. The region has been exploited for gold and iron, among other substances of interest. In addition to abandoned mines, active works and mineralized rocks contribute to the discharge of contaminated waters into the rivers and streams. Thus, high- density geochemical mapping with the determination of reference values has become very important, as it allows the spatial distribution of contaminant elements to be obtained, contributing to the recognition of areas with deviant values in the basin. Two hundred and eight sediment samples were collected from streams throughout the Velhas River Basin, with a density of one sample per 15 km2. Geochemical maps were compiled using the distance-weighted inverse interpolation method, and concentrations were distinguished from anomalies using the box plot Upper Inner Fence technique. It was found that 73–78% of the basin area does not present geogenic and anthropic anomalies, with values up to the third quartile for As, Cd, Cr, Ni, Cu, Pb, and Zn. However, anomalies related to human actions, mainly mining works and rock types, occupy 2 to 11% of the area. This first high-density mapping in the Upper Velhas River Basin found numerous streams with concentrations of the elements studied above the Probable Effect Level, allowing us to determine which locations, cities, and river sub-basins are exposed to environmental risks and should be monitored and protected.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Fonte: PDF do artigo-
Palavras-chave: dc.subjectHigh-density geochemical mapping-
Palavras-chave: dc.subjectReference values-
Palavras-chave: dc.subjectMining contamination-
Palavras-chave: dc.subjectBrazil-
Título: dc.titleGeochemical mapping and reference values of potentially toxic elements in a contaminated mining region : upper velhas river basin stream sediments, Iron Quadrangle, Brazil.-
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