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中文摘要：
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0．5g，吸附时间为1h，吸附酸度为pH=4时，PDMDAAC-膨润土可吸附0．5mmol／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。
英文摘要：
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.
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