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Induction of a geochemical barrier for As, Fe and S immobilization in a sulfide substrate Rev. Bras. Ciênc. Solo
Assis,Igor Rodrigues de; Dias,Luiz Eduardo; Ribeiro Jr,Emerson Silva; Abrahão,Walter Antônio Pereira; Mello,Jaime Wilson Vargas de; Veloso,Renato Welmer.
Acid mine drainage (AMD) is an environmental concern due to the risk of element mobilization, including toxic elements, and inclusion in the food chain. In this study, three cover layers were tested to minimize As, Fe and S mobilization from a substrate from former gold mining, containing pyrite and arsenopyrite. For this purpose, different layers (capillary break, sealant and cover layer) above the substrate and the induction of a geochemical barrier (GB) were used to provide suitable conditions for adsorption and co-precipitation of the mobilized As. Thirteen treatments were established to evaluate the leaching of As, Fe and S from a substrate in lysimeters. The pH, As, Fe, S, Na, and K concentrations and total volume of the leachates were determined....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Jarosite; Arsenic; Cover layers; Gold mining; Rehabilitation.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200036
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