高岭土/胡敏酸复合体对重金属离子吸附解吸实验研究  

Study of Heavy Metal Adsorption-desorption on Kaolinite/humic Acid Complex

作　　者：吴平霄[1] 徐玉芬[1] 朱能武[1] 党志[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广州510006

出　　处：《矿物岩石地球化学通报》2008年第4期356-362,共7页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(40573064;40730741;40202007);广东省自然科学基金资助项目(06025666;04020017);广东省科技计划项目(2006B36601004;2008B030302036);教育部新世纪优秀人才支持计划(NCET-06-0747);华南理工大学SRP资助项目

摘　　要：本文利用高岭土对胡敏酸吸附形成稳定的有机-无机络合物,研究了高岭土/胡敏酸复合体对Cu2+、Cd2+和Cr3+的吸附。结果表明,胡敏酸对高岭土改性后能提高上述三种重金属离子的吸附性能,高岭土/胡敏酸复合体对三种重金属离子的吸附量都随pH值的升高而增加,随离子强度的增加而减小。本文还研究了高岭土/胡敏酸复合体对上述三种重金属离子的吸附动力学,发现吸附过程可用Elovich方程和一级动力学方程进行较好的拟合。In this paper, the Kaolinite / humic acid complex was prepared, and sorption of Cu2＋ , Cd2＋ , Cr3＋ on the Kaolinite / humic acid complex was studied. The results showed that humic acid can modified the Kaolinite to improve its adsorption capacity. The adsorption capacity of these three kinds of heavy metal ions increased when pH increasing and decreased when the ionic strength increasing. The sorption kinetic characteristics of these three kinds of heavy metal ions on Kaolinite-humic acid complex was also studied, and it was found that Elovich equation and One-level kinetic equation can adequately describe the kinetic sorption procedures.

关 键 词：吸附解吸 高岭石 重金属 高岭土/胡敏酸复合体 

分 类 号：X132[环境科学与工程—环境科学]