十六烷基三甲基溴化铵和壳聚糖季铵盐复合改性膨润土对水中苯胺和Cd^(2+)的协同吸附研究  

Study on the simultaneous adsorption of CTMAB-HTCC bentonite towards aniline and Cd^(2+)

作　　者：黄瑞华[1] 王博[1] 郑东升[2] 张增强[1] 

机构地区：[1]西北农林科技大学理学院,陕西杨凌712100 [2]西北农林科技大学资环学院,陕西杨凌712100

出　　处：《功能材料》2012年第5期599-602,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51003086);中央高校基本科研业务费专项资金资助项目(QN2009049)

摘　　要：采用十六烷基三甲基溴化铵(CTMAB)和壳聚糖季铵盐(HACC)复合改性膨润土,制得CT-MAB-HACC膨润土。并将该有机膨润土用于水溶液中苯胺和Cd2+的协同吸附。调查了pH、吸附剂投加量、吸附时间、Cd2+和苯胺初始浓度等因素对吸附效果的影响。实验结果表明,CTMAB-HACC膨润土能同时有效地去除有机污染物苯胺和Cd2+,其对水中苯胺和Cd2+的吸附分别源于分配作用和螯合作用。Cd2+的存在对苯胺的吸附率基本没有影响,但苯胺的存在对Cd2+的吸附有促进作用。CTMAB-HTCC bentonite was prepared using bentonite modified with cetyltrimethyl ammonium bro- mide and quaternized chitosan. This organo-bentonite was applied in the simultaneous adsorption of CTMAB- HTCC bentonite towards aniline and Cd2＋ from aqueous solution. During the experiments, the effects of pH, absorbent dosage, adsorption time, the initial concentration, etc on adsorption were all discussed. The results show that CTMAB-HACC bentonite effectively removes aniline and Cd2＋ from aqueous solution simultaneously. The main adsorption mechanisms for aniline and Cd2＋ are partitioning effect and chelation action, respectively. The presence of Cd2＋ has no influence on the adsorption of aniline, while the presence of aniline can improve the adsorption of Cd2＋ onto CTMAB-HACC bentonite.

关 键 词：CTMAB-HACC膨润土 苯胺 Cd2+ 协同吸附 

分 类 号：TQ028.8[化学工程]