Microbial Effect on Arsenic and Plumbum Release in Acid Coal-Mine Drainage

Batch leaching experiments with different pH and temperature have taken to the pyrite samples from coal seams, state including the reaction system with bacteria of Acidiphilium sp. and aseptic control system. The migratory behavior of 2 hazardous elements of As and Pb was detected for a period of 15 days. The analysis result displayed that the most releasing amount of As appeared in the bacteria reaction system with the condition of pH 1.5, 30 degrees C and 1:100(g:mL) solid-liquid ratio, and the contents was 73 times higher than its aseptic control system. While as to Pb, the result was opposite, Acidiphilium sp. inhibit Pb releasing, it maybe this bacteria accumulation of Pb directly or indirect.