基于土柱淋滤实验的煤矸石饱和状态下溶质释放过程研究  

Coal gangue saturated solute release process based on the soil column leaching experiments

作　　者：张俊[1] 张生[1] 李畅游[1] 韩璞璞[1] 王爽[1] 计亚丽[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018

出　　处：《煤田地质与勘探》2012年第5期56-59,共4页Coal Geology & Exploration

基　　金：国家自然科学基金项目(50869007)

摘　　要：针对煤矸石山在降水淋滤作用下对矿区周边地下水造成污染的严重问题,用实验模拟法对包头石拐区一废弃煤矿进行饱和状态下煤矸石的淋滤实验研究。结果表明:煤矸石中Ca、Mg、Fe、Cu、Zn、NO3、SO42、Cl的淋滤过程都遵循浓度先升高再降低到稳定值的基本规律,只是NO3、SO42、Cl的淋出速率明显大于重金属的淋出速率,Ca和Mg、SO42和Cl、Pb和Cr、Cd有相似的淋出机制;重金属最强淋出率从大到小的顺序是Mg>Cd>Ca>Cu>Zn>Cr>Fe>Pb;Hg和As等含量甚微,均未检出。In view of the serious pollution problem that coal gangue precipitation leaches to groundwater,this paper intends to report the coal gangue leaching experiments in saturation state by experimental simulation method in an abandoned coal mine in Shiguai District of Bao Tou.The results show that： Ca,Mg,Fe,Cu,Zn,NO3,SO42,Cl of coal gangue follow the basic law that concentration first increases and then decreasesa to a steady value.But the leaching rate of NO3,SO42,Cl is significantly greater than the heavy metal leaching rate,Ca and Mg,SO42 and Cl,Pb and Cr,Cd have similar leaching mechanism.The strongest leaching rate of heavy metal from big to small order is： MgCdCaCuZnCrFePb,content of Hg、As is very low and not detected.

关 键 词：饱和状态 煤矸石 淋滤 最强淋出率 

分 类 号：X142[环境科学与工程—环境科学]