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.

中文翻译：

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维埃拉河，蒙特斯·克拉罗斯，巴西的水和沉积物的金属污染。

维埃拉河（Vieira River）是巴西MG Montes Claros市生活和工业废水的主要接收者。直到2010年，未经任何处理就将生活污水倾倒入其中。在干燥季节沿维埃拉河沿岸八个地点的水和沉积物样品中测定了砷（As），铬（Cr），铜（Cu），镍（Ni），铅（Pb）和锌（Zn）的浓度。 2015年。维埃拉河沿岸某些地点的水中检出的铜，镍和锌的浓度高于毒性的参考限值。铜和镍的浓度限制了河中某些地方的灌溉用水。沉积物污染水平通过五种方法进行评估，包括污染因子（CF），污染负荷指数（PLI），地质累积指数（Igeo），聚类分析（CA），和主成分分析/因素分析（PCA / FA）。结果表明，Crs和最靠近蒙特斯克拉罗斯市废水处理厂的下游采样点的PLI，Igeo和CF值最高，这加强了生活和工业废水排放对维埃拉河污染的影响。 。此外，CA和PCA / FA强化了Cr来自人为污染源的假设。