Understanding the environmental impact of a mine dam rupture in Brazil : prospects for remediation.

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dc.contributor.authorSantos, O. S. H.
dc.contributor.authorAvellar, F. C.
dc.contributor.authorAlves, M.
dc.contributor.authorTrindade, R. C.
dc.contributor.authorMenezes, M. B.
dc.contributor.authorFerreira, M. C.
dc.contributor.authorFrança, G. S.
dc.contributor.authorCordeiro, J.
dc.contributor.authorSobreira, Frederico Garcia
dc.contributor.authorYoshida, Maria Irene
dc.contributor.authorMoura, P. M.
dc.contributor.authorScotti, M. R.
dc.date.accessioned2023-07-27T20:04:31Z
dc.date.available2023-07-27T20:04:31Z
dc.date.issued2019pt_BR
dc.description.abstractThe rupture of the Fundão mine dam in Mariana municipality, Minas Gerais State, Brazil, spilled the tailings across the Doce River basin. These tailings, composed of residues discarded from the beneficiation of iron ore, are rich in SiO2 and Al2O3, as well as some ether amine compounds and NaOH. The aim of this study was to assess the distribution of these sediments, as well as their effect on the riparian zones reached, as compared with preserved sites. Sediment deposition in the river resulted in a morphological change from a meandering profile to a braided aspect. The nutrient and mineral content (P, K, Ca, Mg, Cu, Fe, Mn, Zn, and NO3−) and soil organic matter of the sediments were depleted, whereas NH4+, Na, and pH increased. A random presence of ether amines in the sediments was confirmed by quantitative and chromatographic analyses, with concentrations ranging from 0 to 57.8 mg kg−1; Na reached values as high as 150 mg kg−1. The impact of the dam tailings on biota was assessed by estimating total microbial biomass (phospholipid fatty acids), which were depleted in sediments relative to soils from preserved sites. Overall plant mortality, as well as a low resilience capacity, were also observed. Ether amines and Na present in the sediments had a strong toxic effect in the environment. Identification of these substances as the main impact factors will help guide future remediation efforts.pt_BR
dc.identifier.citationSANTOS, O. S. H. et al. Understanding the environmental impact of a mine dam rupture in Brazil: prospects for remediation. Journal of Environmental Quality. v. 48, n. 2, p. 439-449, mar./abr. 2019. Disponível em: <https://acsess.onlinelibrary.wiley.com/doi/abs/10.2134/jeq2018.04.0168>. Acesso em: 15 mar. 2023.pt_BR
dc.identifier.doihttps://doi.org/10.2134/jeq2018.04.0168pt_BR
dc.identifier.issn1537-2537
dc.identifier.urihttp://www.repositorio.ufop.br/jspui/handle/123456789/17091
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseThis is an open access article distributed under the terms of the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Fonte: PDF do artigo.pt_BR
dc.titleUnderstanding the environmental impact of a mine dam rupture in Brazil : prospects for remediation.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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