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.
出处
《济南大学学报（自然科学版）》
CAS
北大核心
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)
关键词
聚二甲基二烯丙基氯化铵
膨润土
苯甲酸
吸附
polydimethydiallylammonium chloride
bentonite
benzoic acid
adsorption
