粘土矿物吸附重金属的研究  

Study on the Adsorption of Heavy Metals with Clays

作　　者：李艳梅[1] 任晓莉[1] 杜云云[1] 廉玲[1] 张凤杰[1] 

机构地区：[1]大连民族学院生命科学学院,辽宁大连116600

出　　处：《天津农业科学》2011年第2期34-37,共4页Tianjin Agricultural Sciences

基　　金：国家民委2008年重点研究项目(2008DL-05);大连民族学院校青年基金(2008A203)

摘　　要：采用蒙脱石和高岭石为吸附剂,研究了其对水中的Cu2+、Pb2+、Zn2+的吸附选择性。结果表明:蒙脱石的吸附容量大于高岭石。粘土矿物对重金属的吸附量随着pH值的增大而增大。在pH4,25℃的条件下,蒙脱石和高岭石对不同重金属离子的吸附容量大小顺序均为:Pb2+>Cu2+>Zn2+。通过吸附等温线的拟合,证实了蒙脱石对重金属离子具有良好的吸附选择性。The montmorillonite and kaolinite as adsorbents were studied on the selective adsorption of Cu2＋,Pb2＋,Zn2＋.The result showed that the adsorption capacities of the two clays for the three heavy metals were found to be in order of montmorillonite kaolinite.The adsorption capacities of heavy metals on clays increased with the increasing of pH values.In the condition of pH4 and 25 ℃,adsorption capacities of montmorillonite and kaolinite for different heavy metal ions were both in order of Pb2＋Cu2＋Zn2＋.Through the isotherms fitted with different models,it was evidenced that montmorillonite had excellent adsorptive selectivity to heavy metal ions.

关 键 词：蒙脱石 高岭石 重金属 吸附容量 吸附等温式 

分 类 号：X703.1[环境科学与工程—环境工程]