咪唑基双阳离子有机膨润土对甲基橙的吸附  

Adsorption of imidazolium dual cation organobentonite on methyl orange

作　　者：陈煜炜 王玉红[1] 宋瑞峰[1] CHEN Yuwei;WANG Yuhong;SONG Ruifeng(School of Chemistry and Life Sciences,SUST,Suzhou 215009,China)

机构地区：[1]苏州科技大学化学与生命科学学院,江苏苏州215009

出　　处：《苏州科技大学学报（自然科学版）》2020年第4期38-44,共7页Journal of Suzhou University of Science and Technology（Natural Science Edition）

基　　金：住房与城乡建设部科技基金资助项目(2010-K7-12)。

摘　　要：以咪唑基双子表面活性剂1,1'-(1,2-乙二基)双十六烷基咪唑二溴化物(Bim)改性钠基膨润土制备了一种新型的有机膨润土。通过XRD、FT-IR、TG和SEM等手段表征了Bim-膨润土的结构和形貌,研究了改性剂Bim加入量、温度、pH值和吸附时间对甲基橙吸附效率的影响。结果表明:吸附效果随温度(20~60℃)和pH值(3~11)的变化不大,最佳改性剂加入量为1.2CEC,吸附时间70 min,最大吸附量为240.1 mg·g^-1。Bim-膨润土对甲基橙的吸附过程符合Langmuir等温吸附模型,吸附速率符合准二级动力学模型。A new type of organic bentonite(Bim-bentonite)was prepared by sodium bentonite modified with Gemini imidazolium surfactant 1,1'-(1,2-ethylenediyl)bishexadecylimidazoledibromide(Bim).The structure and morphology of Bim-bentonite were characterized by XRD,FT-IR,TG and SEM.The effects of the addition amount,temperature,pH and adsorption time of the modifier Bim on the adsorption capacity of methyl orange were studied.The results show that the adsorption effect hardly changes with temperature(20~60℃)and pH(3~11).The best modifier is 1.2CEC,the adsorption time is 70 min,and the maximum adsorption amount is 240.1 mg·g^-1.The adsorption process of Bim-bentonite on methyl orange conforms to the Langmuir isothermal adsorption model,and the adsorption rate conforms to the quasi-second-order kinetic model.

关 键 词：咪唑基双子表面活性剂 钠基膨润土 吸附 甲基橙 

分 类 号：X703.1[环境科学与工程—环境工程] O69[理学—化学]