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.
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