有机膨润土对水中苯、甲苯、乙苯、二甲苯和铬酸根离子的吸附性能  

Adsorption Behavior of Organo Bentonite for Benzene/toluene/ethylbenzene/xylene and Chromate in Water

作　　者：刘莺[1] 黄晓佳[1] 刘学良[1] 王俊德[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116012

出　　处：《应用化学》2002年第4期317-320,共4页Chinese Journal of Applied Chemistry

基　　金：中国科学院出国留学人员启动基金;大连市回国留学人员科研基金资助

摘　　要：考察了有机膨润土对水中苯、甲苯、乙苯、二甲苯和铬酸根离子的吸附性能 .有机膨润土对苯、甲苯、乙苯、二甲苯的吸附曲线在低质量浓度范围 (0～ 0 .2 g/L)内呈现良好的线性关系 ;对铬酸根离子的吸附符合Langmuir吸附模型 ,1 5℃时的饱和吸附容量为 5 71 .2 1 mg/kg,并对铬酸根饱和的有机膨润土的再生进行了研究 .结果表明 ,有机物改性后的膨润土与原土比较 ,对苯、甲苯、乙苯和二甲苯 (BTEX)和铬酸根的吸附容量均大大提高 .使用碱性溶液对铬酸根饱和的有机膨润土萃取回收率为 84% ,再生后基本恢复了有机膨润土对铬酸根离子以及The adsorption behavior of organo bentonite to benzene/toluene/ethylbenzene/xylene(BTEX) and chromate in water was examined. The adsorption curves of organo bentonite for BTEX were well linear in range of 0 g/L to 0 2 g/L. The adsorption isotherm for chromate was agreed with Langmuir equation. The saturation adsorption capacity of organo bentonite to chromate was 571 21 mg/kg . Both adsorption quantities of organo bentonite to BTEX and chromate were found to be greatly increased in comparision with that of natural bentonite. The regeneration of chromate saturated organo bentonite was studied. The efficiency for extracting chromate from chromate saturated organo bentonite in alkaline solution was 84%.

关 键 词：有机膨润土 苯 甲苯 乙苯 二甲苯 铬酸根 污水处理 吸附性能 有机污染物 

分 类 号：X703.1[环境科学与工程—环境工程]