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2020/10/1 · In the Amazon, studies on contamination by potentially toxic elements (PTEs) have focused on mercury (Hg), mainly in artisanal Au mining areas (Castilhos et al., 2015; Faial et al., 2015). Although there are high concentrations of PTEs in Au mining wastes ( Ono et al., 2012 ; Souza et al., 2017 ), few studies have been carried out on the levels of As in Au exploitation areas in the Amazon.

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2021/6/22 · New Delhi, Jun 22 (PTI) Vedanta Ltd on Tuesday said the coal block in Odisha allotted to it, once operational, will provide fuel security, improve power availability and further