十六烷基三甲基溴化铵改性的凹凸棒黏土对Cu^(2+)的吸附性能  

Adsorption Performance of Attapulgite Modified by Cetyl Trimethyl Ammonium Bromide for Cupric Ion

作　　者：李静萍[1] 杨佳静[1] 管振杰 仝云霄 张念[1] 

机构地区：[1]兰州交通大学化学与生物工程学院,甘肃兰州730070

出　　处：《材料保护》2014年第9期59-61,9,共3页Materials Protection

基　　金：甘肃省科技计划项目(1010RJZA073);甘肃省建设科技攻关项目(JK2010-31);金川公司预研基金(JCYY2013002)资助

摘　　要：为提高凹凸棒黏土(ATP)的吸附性能,以十六烷基三甲基溴化铵(CTAB)对粗提纯的ATP作超声波有机改性,通过单因素和正交试验优选条件,分析吸附模型。结果表明:最佳吸附条件为p H值5,温度20℃,改性凹凸棒黏土(O-ATP)用量0.8 g,振荡时间2.0 h,吸附率可达99.28%;O-ATP对Cu2+的吸附符合Freundlich吸附模型。Primarily purified attapulgite clay was modified with cetyltrimethyl ammonium bromide(CTAB) under ultrasonic irradiation so as to improve the adsorption performance for cupric ion(Cu^(2+).The adsorption condition was optimized with single factor test and orthogonal test,and the adsorption model was analyzed as well.Results indicated that the optimal adsorption capacity was acquired at a pH value of 5,a temperature of 20℃,a modified attapulgite clay dosage of 0.8 g,and an oscillation time of 2.0 h.Under the optimal adsorption condition,Cu2+ could be adsorbed at a rate of 99.28%.Besides,the adsorption of Cu^(2+) by the modified attapulgite clay could be well described with the Freundlich equation.

关 键 词：有机改性 超声波 CU^2+ 凹凸棒黏土 十六烷基三甲基溴化铵 吸附性能 

分 类 号：X703[环境科学与工程—环境工程]