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dc.contributor.authorReis, Deyse Almeida dos-
dc.contributor.authorNascimento, Laura Pereira do-
dc.contributor.authorAbreu, Adriana Trópia de-
dc.contributor.authorNalini Júnior, Hermínio Arias-
dc.contributor.authorRoeser, Hubert Mathias Peter-
dc.contributor.authorSantiago, Aníbal da Fonseca-
dc.date.accessioned2020-05-07T20:42:22Z-
dc.date.available2020-05-07T20:42:22Z-
dc.date.issued2020-
dc.identifier.citationREIS, D. A. dos et al. Geochemical evaluation of bottom sediments affected by historic mining and the rupture of the Fundão dam, Brazil. Environmental Science and Pollution Research, v. 27, p. 4365–4375, 2020. Disponível em: <https://link.springer.com/article/10.1007/s11356-019-07119-1>. Acesso em: 10 mar. 2020.pt_BR
dc.identifier.issn1614-7499-
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/12164-
dc.description.abstractThe rupture of the Fundão dam released about 39 million m3 of tailings into the Rio Doce/Brazil. The sediment load increase in the affected rivers has become a concern. As such, this article provides recent information about the region. In addition, based on past studies in the region, it shows the magnitude and dynamics of the environmental impacts caused by the rupture of the dam on the bottom sediments. Sediment samples in different seasonal periods were collected at eleven sampling stations located along the Gualaxo do Norte River, the first tributary of the Rio Doce affected by the environmental disaster. These sediments underwent physical, chemical, and granulometric analyses for their organic, metal, and semimetal content. The contamination factor and the enrichment factor of the samples also were calculated. To evaluate the anthropogenic contributions to sediment metal concentrations, reference values (regional background values) for the Gualaxo do Norte River were used. The results indicate that, in the sampling stations not affected by the disaster, the concentrations of the metals and semimetals reflect the geology of the Quadrilátero Ferrífero. However, in the area affected by the environmental disaster, there were changes in the chemical and physical properties of the bottom sediment, mainly in the concentrations of iron, organic matter, and fine sediment fractions. This was reflected in the contamination factors and enrichment factors calculated for the sediments of the sampling stations. Iron and manganese concentrations in sediments are much higher than other rivers in the world that are unaffected by mining activities. The observed changes in the bottom sediments of the river suggest a need for constant monitoring of the iron because the iron oxide minerals present in silt and clay have a high adsorption capacity. In the long term, these factors may contribute to the decrease of the quality of these sediments and consequently of the waters and biota present in these environments.pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectEnrichment factorpt_BR
dc.subjectEnvironmental disasterpt_BR
dc.subjectEnvironmental impactspt_BR
dc.subjectRio Docept_BR
dc.subjectMetals/semimetalspt_BR
dc.titleGeochemical evaluation of bottom sediments affected by historic mining and the rupture of the Fundão dam, Brazil.pt_BR
dc.typeArtigo publicado em periodicopt_BR
dc.identifier.uri2https://link.springer.com/article/10.1007/s11356-019-07119-1pt_BR
dc.identifier.doihttps://doi.org/10.1007/s11356-019-07119-1pt_BR
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