粘土矿物的掺杂对沉积物吸持Cu、Zn能力的影响  

Effect of Clay Minerals Adulterated in Sediments on Sorption Ability of Cu and Zn

作　　者：王晓丽[1,2] 李鱼[2,3] 王一喆[2] 杜显元[3] 王婷[3] 刘建林[3] 

机构地区：[1]吉林大学植物科学学院,长春130062 [2]吉林大学环境与资源学院,长春130012 [3]华北电力大学能源与环境研究中心,北京102206

出　　处：《吉林大学学报（地球科学版）》2010年第1期183-187,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家重点基础研究发展规划项目(2004CB418501)

摘　　要：通过考察粘土矿物及掺杂粘土矿物前后沉积物的吸附/解吸特性,分析了伊利石与蒙脱石对重金属污染沉积物中Cu与Zn稳定固定化的可行性。结果表明:伊利石与蒙脱石的掺杂均降低了沉积物吸持Cu的能力(最大下降量分别为5.4%和3.8%),伊利石的掺杂同样降低了沉积物吸持Zn的能力(最大下降量为4.4%),但蒙脱石掺杂后沉积物吸持Zn的能力明显增强,最高增加5.7%。因此,蒙脱石具有固定污染沉积物中Zn的能力,但不能提高污染沉积物中Cu的稳定性。The feasibility of illite and montmorillonite to immobilize Cu and Zn in the contaminated sediments was investigated by analyzing the adsorption capacities of illite and montmorillonite, the adsorption/desorption characteristics of the sediments before and after the clay minerals adulterating. The results indicate that the adulterated illite and montmorillonite reduce the adsorption capacity of Cu with the maximum decrease of 5.4% for illite and 3.8% for montmorillonite, and the adulterated illite also decreases the sequestration of Zn in the sediments with the maximum decrease of 4.4%, but the adulterated montmorillonite enhances the adsorption and sequestration ability of Zn into the sediments with the maximum increase of 5.7%. Therefore, the montmorillonite is recognized as the most suitable materials for stabilizing and immobilizing Zn in the contaminated sediments, but it can not enhance Cu stabilizing in polluted sediments.

关 键 词：沉积物 伊利石 蒙脱石 固定化 吸持能力 

分 类 号：X132[环境科学与工程—环境科学]