混合煤矿酸性水中金属元素的迁移行为  

Migration of Metal Elements in Mixed Acid Mine Drainage

作　　者：孙红福[1] 赵峰华[1] 李静琴[1] 张梦[1] 石磊[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《环境科学与技术》2010年第S2期111-114,152,共5页Environmental Science & Technology

基　　金：国家自然科学基金项目(40972110);教育部科学技术研究重点项目(109033);教育部新世纪优秀人才支持计划项目(NCET-07-0801);中央高校基本科研业务费项目资助(2009QD01;2009QD08)

摘　　要：煤矿酸性水在与其它矿井水混合的过程中,pH由2.76升至3.85,高浓度的Fe离子形成新的胶体沉淀,并与悬浮颗粒物共同影响煤矿酸性水中金属离子的迁移特性。在煤矿酸性水混合实验中,Fe、Cr和Pb离子最终浓度比理论平均浓度分别降低了45%、38%和28%,比实验初始浓度分别降低了3.2%、3.8%和52.4%;而Al、Mn、Cu、Zn、As、Cd、Co、Ni和Cs离子最终浓度均高于理论平均浓度和实验初始浓度。实验结果表明:酸性矿井水中的悬浮颗粒物在溶液离子强度降低时向混合溶液中释放了Al、Mn、Cu、Zn、As、Cd、Co、Ni和Cs;然而悬浮颗粒物和新生成的Fe胶体对Cr和Pb具有强烈地吸附作用。The pH of acid coal mine drainage incresed from 2.76 to 3.85 during mixed three acid mine drainage(AMD),and high concentration of Fe formed lots of new colloids.The suspended particles and Fe colloid influenced the migration of metal elements in AMD.In mixed AMD experiment,the final concentrations of Fe,Cr and Pb were decresed 45%,38% and 28% compared with the average concentrations,repectively;and the final concentrations of Fe,Cr and Pb were decreased compared with initial concentions(3.2%,3.8% and 52.4%).But the final concentrations of Al,Mn,Cu,Zn,As,Cd,Co,Ni and Cs were higher than average concentrations and intial concentrations.The experiment results indicated that the suspended particles in AMD could release Al,Mn,Cu,Zn,As,Cd,Co,Ni and Cs ions to solution when the ionic strength decreased,but the Fe colloid and suspended particels could adsorb Cr and Pb strongly.

关 键 词：酸性矿井水 金属元素 迁移行为 颗粒物 

分 类 号：X13[环境科学与工程—环境科学]