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Assessment of Gualaxo do Norte River water quality (Minas Gerais, Brazil) affected by the dam breach of Fundão utilizing exploratory multivariate techniques.
Santos, Grazielle; Reis, Deyse; Santos, Ingrid; Lima, Leandro; Rocha, Camila; Castro, Paulo; Lobo, Fabiana; Santiago, Aníbal; da Silva, Gilmare.
Afiliação
  • Santos G; Department of Environmental Engineering, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil. grazielle.santos@aluno.ufop.edu.br.
  • Reis D; Department of Environmental Engineering, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • Santos I; Department of Pharmacy, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • Lima L; Department of Chemistry, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • Rocha C; Department of Pharmacy, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • Castro P; Department of Environmental Engineering, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • Lobo F; Department of Chemistry, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • Santiago A; Department of Civil Engineering, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil.
  • da Silva G; Department of Chemistry, Federal University of Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil.
Environ Monit Assess ; 195(2): 337, 2023 Jan 27.
Article em En | MEDLINE | ID: mdl-36705892
At the end of 2015, the Fundão dam belonging to the Samarco S.A. mining company was ruptured, releasing a flood of mud into the Gualaxo do Norte River, which advanced into the Doce River. The aim of the present study was to apply exploratory multivariate approaches to water quality data obtained during sampling campaigns at the Gualaxo do Norte River during the dry and rainy seasons, between July 2016 and June 2017. A total of 27 locations along the river were sampled, covering unaffected areas and regions influenced by the tailings waste from the dam. Determinations of chemical, physical, and microbiological water quality parameters were performed. Application of principal component analysis (PCA) resulted in the first two components together explaining 39.49% and 37.91% of the total variance for the dry and rainy season data, respectively. In both cases, the PCA groups were related to variables such as turbidity and total solids, which both presented higher values in regions affected by the mud flow. These results are in agreement with those obtained by the Kohonen neural network method, where two-dimensional maps confirmed the samples according to the affected and unaffected area by the disaster.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Qualidade da Água País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Monit Assess Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Qualidade da Água País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Monit Assess Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda