壳聚糖插层有机膨润土的制备及吸附性能研究  

Synthesis and absorption performance of chitosan intercalation organobentonite

作　　者：何丽仙[1] 李晓红[2] 张剑[2] 王基伟[1] 

机构地区：[1]大理学院云南省昆虫生物医药研发重点实验室,大理671000 [2]中国石油吉林石化公司研究院,吉林132021

出　　处：《化工新型材料》2014年第7期153-155,共3页New Chemical Materials

基　　金：云南省科技厅创新团队项目(2011C1132);州院共建洱海治理项目(YY2011012)

摘　　要：采用微波辅助法,以十六烷基二甲基苄基溴化铵及壳聚糖对膨润土进行改性,制备了一种新型的壳聚糖插层有机膨润土材料。通过红外光谱(FTIR)、X-射线衍射(XRD)及扫描电镜(SEM)对膨润土及插层膨润土进行了表征。结果表明壳聚糖已经进入膨润土层间,层间距由1.41nm增大至2.04nm。对该材料吸附水中苯酚的性能进行了研究,结果显示在25℃,pH=6的条件下,最大理论吸附量为73.25mg/g,最大理论吸附量随温度升高而降低。用不同模型对等温线进行了拟合,结果表明等温吸附平衡更符合Langmuir模型。A kind of novel chitosan intercalation organobentonite was prepared by modifying bentonite with benzyldimethylhexadecylammonium bromide and chitosan. The modifying process was conducted by microwave irradiation. The bentonite and its modi？ ed form were characterize by fourier transform infrared （FTIR）,X-ray diffraction （XRD）and Scanning electron microscope （SEM）measurements. The results showed that the chitosan had been successfully inserted into the inter layers,and the basal spacing was increased from1.41nm to 2.04nm. The adsorption performance of the material was studied for the removal of phenol. The results indicated that the highest adsorption capacity （qm）adsorption capacity of modi？ ed bentonite was 73.25mg/g at 25 ℃, with the conditions of pH 6, and it decreased with increasing temperature. The adsorption isotherm datas were modeled using several models. Langmuir isotherm model represented the adsorption equilibrium data better than the Freundlich isotherm model.

关 键 词：膨润土 壳聚糖 吸附 苯酚 

分 类 号：TD985[矿业工程—选矿] O647.3[理学—物理化学]