蛭石对水中重金属离子的吸附性能  

Adsorption Properties of Heavy Metal Ions in Water by Vermiculite

作　　者：夏银 刘月迎 王丽娟 吕国诚 刘昊 廖立兵 XIA Yin;LIU Yueying;WANG Lijuan;LYU Guocheng;LIU Hao;LIAO Libing(School of Materials Science and Technology,Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes,China University of Geosciences(Beijing),Beijing,100083,China;School of Science,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,非金属矿物与固废资源材料化利用北京市重点实验室,北京100083 [2]中国地质大学(北京)数理学院,北京100083

出　　处：《硅酸盐学报》2022年第5期1357-1363,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金重点项目(41831288)。

摘　　要：多金属矿山尾矿库渗滤液造成的地下水重金属污染严重,为有效利用矿物材料对地下水中重金属吸附,在对新疆尉犁蛭石进行定性、定量分析的基础上,通过静、动态吸附实验,研究了其对多金属硫化物尾矿渗滤液中常见的Cu^(2+)、Pb^(2+)、Zn^(2+)、Mn^(2+)的单独或共存状态下的吸附行为及吸附机理。研究表明:蛭石对Cu^(2+)、Pb^(2+)、Zn^(2+)、Mn^(2+)的吸附量分别为49.53、108.00、44.11 mg/g和32.47 mg/g,并且吸附符合Langmuir等温吸附模型,为单分子层吸附,吸附机理为层间离子交换、表面静电和表面络合共同作用。在动态吸附实验的条件下,蛭石填料在528 h达到平衡浓度,作用时间较长。完善了蛭石对多种重金属作用的基础性工作,并且蛭石在PRB技术中的长期运行,可为PRB矿物介质材料设计和优化提供重要指导。In this paper,the adsorption behavior and mechanism of Cu^(2+)、Pb^(2+)、Zn^(2+)and Mn^(2+)ions in the leachate of polymetallic sulfide tailings with vermiculite from Yuli Xinjiang,China were investigated.The results indicate that the adsorption capacities of vermiculite for Cu^(2+),Pb^(2+),Zn^(2+),Mn^(2+)ions are 49.53 mg/g,108.00 mg/g,44.11 mg/g,32.47 mg/g,respectively,and the monolayer adsorption process follows the Langmuir isothermal adsorption model.The adsorption mechanism is due to a combined effect of interlayer ion exchange,surface static electricity and surface complexation.Vermiculite as a filler reaches the equilibrium concentration for 528 h,and the running time is longer under the dynamic adsorption condition.This work can provide a guidance for the design and optimization of vermiculite as an adsorbent for removal of heavy metal ions in groundwater.

关 键 词：蛭石 吸附 重金属离子 渗透反应格栅 水处理 

分 类 号：T-013[一般工业技术]