Control of Heavy Metals Contamination from Coal Wastes through Microbial Sulfate Reduction Process
Acid-mine drainage (AMD) that releases highly acidic, sulfate, and metals-rich drainage is a serious environmental problem, contaminating surface and groundwater as well as soils in coal mining districts in China. This paper presents a laboratory investigation to study the possibility of using sulfate-reducing bacteria (SRB) for inhibiting AMD and controlling heavy metals contamination from coal wastes, which is considered to be the major environmental pollution associated with coal mining activities. Tests were conducted to determine if the bacteria produced hydrogen sulfide could be used for the removal of soluble heavy metals of AMD from coal wastes. We investigated the mechanisms of heavy metals ions precipitation in the form of sulfides from the coal waste by sulfate-reducing bacteria. We investigated the effect of the dosage of SRB inoculation on controlling heavy metals contamination. The results show that SRB can effectively immobilize cadmium and zinc of AMD from coal waste, increase pH value and decrease Eh, EC and SO4 2- concentrations of AMD from coal wastes. The SRB can effectively control heavy metals (Cd and Zn) contamination and AMD from coal wastes.
sulfate-reducing bacteria coal wastes heavy metals contamination acid mine drainage
MA Baoguo BIE Fengxi ZHANG Jie
College of water resource and hydroelectricity,Hebei University of Engineering,Handan 056021,Hebei,C College of safety and environmental engineering,Capital University of Economics and Business,Beijing College of water resource and hydroelectricity,Hebei University of Engineering,Handan 056021,Hebei,C
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
2068-2071
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）