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| Guimarães,Lorena A. de O. P.; Dias,Luiz E.; Assis,Igor R. de; Cordeiro,Amanda L.. |
| ABSTRACT The processing of gold ores exploited in Paracatu, MG, generates tailings that are challenging for revegetation, mainly because of the high content of arsenic and salinity. Aiming at the revegetation of the area of disposal of these tailings, the objective of this study was to evaluate the effects of phosphorus doses on vetiver plants (Chrysopogon zizanioides) and on the planting substrate, which consisted of tailings from the processing of ore named B1, exploited in Paracatu, with water restriction. Vetiver was grown for four months in the substrate under doses of 0, 140, 280, 560 and 1280 mg kg-1 of P2O5. Increasing doses of phosphorus improved the chemical characteristics of the substrate. However, the highest dose (1280 mg kg-1 P2O5) resulted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sulfide substrate; Gold mining; Environmental reclamation; Chrysopogon zizanioides. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001000891 |
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| 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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