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Type: Artigo de periódico
Title: Processos físico-químicos em drenagem ácida de mina em mineração de carvão no sul do Brasil
Title Alternative: Physico-chemical processes in acid mine drainage in coal mining, south Brazil
Author: Campaner, Veridiana Polvani
Luiz-Silva, Wanilson
Abstract: Acid mine drainage generated from coal mine showed a pH of 3.2, high concentrations of SO4(2-), Al, Fe, Mn, Zn and minor As, Cd, Co, Cr, Cu, Ni and Pb. The major reduction in the concentration occurred for Al, As, Cr, Fe and Pb after the treatment with CaO. The evolution of these acid waters within the tributary stream showed decreasing concentration for all soluble constituents, except Al. This natural attenuation was controlled by pH (6.4 to 10.8) as a result of concurrent mixing with tributary stream and reaction with local bedrock that contains limestone. Aluminum increasing concentration during this evolution seems to be related to an input of Al-enriched waters due to the leaching of silicate minerals in alkaline conditions.
Subject: acid mine drainage
metal contamination
treatment with CaO
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422009000100028
Date Issue: 1-Jan-2009
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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