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Metal Contamination of Water and Sediments of the Vieira River, Montes Claros, Brazil

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Abstract

Vieira River is the main recipient of domestic and industrial wastewater in the city of Montes Claros, MG, Brazil. Until 2010, domestic sewage was dumped in it without any kind of treatment. Concentrations of arsenic (As), chrome (Cr), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) were determined in water and sediment samples in eight locations along the Vieira River during the dry season of 2015. Concentrations of Cu, Ni, and Zn detected in the water at some sites along the Vieira River were superior to the reference limits for toxicity. The concentration of Cu and Ni restricts the use of water for irrigation in some sites of the river. The level of sediment contamination was assessed by five approaches, including contamination factor (CF), pollution load index (PLI), geo-accumulation index (Igeo), cluster analysis (CA), and principal component analysis/factor analysis (PCA/FA). The results showed that Cr and the downstream sampling site nearest to the Wastewater Treatment Plant of the city of Montes Claros had the highest values of PLI, Igeo, and CF, which reinforces the influence of domestic and industrial wastewater discharge in pollution of the Vieira River. In addition, CA and PCA/FA reinforced the assumption that Cr comes from anthropogenic pollution sources.

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Acknowledgements

The authors thank Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) for financial support; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for providing scholarships; and Espaço da Escrita—Pró-Reitoria de Pesquisa—Universidade Estadual de Campinas (UNICAMP)—for the language services provided.

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Correspondence to Matheus Mendes Reis.

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Reis, M.M., Tuffi Santos, L.D., da Silva, A.J. et al. Metal Contamination of Water and Sediments of the Vieira River, Montes Claros, Brazil. Arch Environ Contam Toxicol 77, 527–536 (2019). https://doi.org/10.1007/s00244-019-00666-1

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  • DOI: https://doi.org/10.1007/s00244-019-00666-1

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