改性膨润土对水中苯甲酸的吸附  

Adsorption Behaviour of Benzoic Acid in Water on Modified Bentonite

作　　者：杨健[1] 辛晓东[2] 魏琴[3] 杜斌[1] 

机构地区：[1]济南大学资源与环境学院,山东济南250022 [2]济南市供排水监测中心,山东济南250000 [3]济南大学化学化工学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2012年第3期241-245,共5页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(21075052)

摘　　要：采用氯化钠对膨润土进行钠化,与聚二甲基二烯丙基氯化铵(PDMDAAC)作用制得PDMDAAC-膨润土。经FTIR分析,研究PDMDAAC-膨润土对水中苯甲酸的最佳吸附条件、吸附动力学及等温线拟合。结果表明:当选取吸附剂用量为0.5 g,吸附时间为1 h,吸附酸度为pH=4时,PDMDAAC-膨润土可吸附0.5 mmol/L的苯甲酸,其最大吸附效率可达86.57%。PDMDAAC-膨润土对苯甲酸的吸附符合拟二级动力学方程及Langmuir型等温曲线。Using sodium modified bentonite and polydimethydiallylammonium chloride, we prepared polydimethydiallylammonium chloride-bentonite （PDMDAAC-bentonite） via exchange reaction and analyzed it by FTTR. The adsorption behavior of benzoic acid by PDMDAAC-bentonite was studied, and the best experimental conditions were investigated. Experimental results show that PDMDAAC- bentonite can adsorb 0.5 mmol/L benzoic acid with the maximal removal efficiency of 86.57% under the optimial conditons of 0.5 g sorbent, 1 h adsorption time and pH = 4. The adsorption kinetic data of benzoic acid by PDMDAAC-bentonite fitts the pseudo-second-or- der model well, and its adsorption isotherm meets with Langmuir adsorption model.

关 键 词：聚二甲基二烯丙基氯化铵 膨润土 苯甲酸 吸附 

分 类 号：X78[环境科学与工程—环境工程]