Effect of loess for preventing contamination of acid mine drainage from coal waste  

作　　者：MA Bao-guo WANG Hui-yong GAO Ran LI Shu-li 

机构地区：[1]College of Water Resource and Hydroelectricity,Hebei University of Engineering,Handan 056021,China [2]Yongnian County Forestry Bureau ofHebei,Yongnian 057150,China

出　　处：《Journal of Coal Science & Engineering(China)》2012年第3期302-306,共5页煤炭学报（英文版）

基　　金：Supported by the-National Natural Science Foundation of China （30671448）; the Science and Technology Pillar Program of Hebei Province 12220802D）

摘　　要：Acid mine drainage （AMD） that releases highly acidic, sulfate and metals-rich drainage is a serious environmental problem in coal mining areas in China. In order to study the effect of using loess for preventing AMD and controlling heavy metals contamination from coal waste, the column leaching tests were conducted. The results come from experiment data analyses show that the loess can effectively immobilize cadmium, copper, iron, lead and zinc in AMD from coal waste, increase pH value, and decrease Eh, EC, and 8024- concentrations of AMD from coal waste. The oxidation of sulfide in coal waste is prevented by addition of the loess, which favors the generation and adsorption of the alkalinity, the decrease of the population of Thiobacillusferrooxidans, the heavy metals immobilization by precipitation of sulfide and carbonate through biological sul- fate reduction inside the column, and the halt of the oxidation process of sulfide through iron coating on the surface of sulfide in coal waste. The loess can effectively prevent AMD and heavy metals contamination from coal waste in in-situ treatment systems.

关 键 词：acid coal waste acid mine drainage LOESS heavy metals contamination PREVENTION 

分 类 号：X751.031[环境科学与工程—环境工程] TD849.5[矿业工程—煤矿开采]