Remediação de drenagem ácida de mina usando zeólitas sintetizadas a partir de cinzas leves de carvão

Abstract

Recebido em 30/6/05; aceito em 28/9/05; publicado na web em 18/4/06 REMEDIATION OF ACID MINE DRAINAGE USING ZEOLITES SYNTHESIZED FROM COAL FLY ASH. Zeolitic material was synthesized from coal fly ashes (baghouse filter fly ash and cyclone filter fly ash) by hydrothermal alkaline activation. The potential application of the zeolitic product for decontamination of waters from acid mine drainage was evaluated. The results showed that a dose of 30 g L-1 of zeolitic material allowed the water to reach acceptable quality levels after treatment. Both precipitation and cation-exchange processes accounted for the reduction in the pollutant concentration in the treated waters.