阳离子聚合物/膨润土纳米复合吸附材料的性能及对红色染料的脱色  

Properties of and decoloration of orcein dye on epicholorohydrin-dimethylamine cationic polymer/bentonite nanocomposite adsorption material

作　　者：李倩[1] 岳钦艳[1] 高宝玉[1] 刘莉莉[1] 

机构地区：[1]山东大学环境科学与工程学院,山东济南250100

出　　处：《化工学报》2006年第2期436-441,共6页CIESC Journal

基　　金：山东省自然科学基金项目(Y2003B03).~~

摘　　要：利用阳离子聚合物-聚环氧氯丙烷二甲胺为插层剂,采用“有机高聚物溶液直接插层复合法”制备了一系列阳离子聚合物聚环氧氯丙烷二甲胺/膨润土纳米复合吸附材料,经特性分析表明,经聚环氧氯丙烷二甲胺插层复合后的膨润土比表面积显著增加,表面电性由负值变为正值,颗粒的聚集程度增加,有较好的吸附和沉降性能.在此基础上,研究了还原大红R、分散大红S-R、活性艳红K-2BP等红色染料在复合膨润土上的吸附行为.结果表明,聚环氧氯丙烷二甲胺/膨润土对三种染料的吸附脱色能力明显大于钠基膨润土,平衡吸附量qe与平衡浓度Ce之间的关系均符合Langmuir和Freundlich等温吸附模型,吸附动力学行为遵循Langmuir方程所述规律.A new cationic polymer, epicholorohydrin-dimethylamine polymer （EPI-DMA） as intercalary reagent was used to prepare a series of cationic polymer/bentonite （EPI- DMA/Bt） nanocomposite adsorption material. It was shown by the characteristic analysis that the surface area and degree of aggregation of the modified bentonite greatly increased as compared with that of unmodified bentonite and ξ electric potential changed from negative to positive. The adsorption of reductive reddish R, disperse reddish S-R, and activated reddish violet K-2BP on the EPI-DMA/Bt were also studied. The results indicated that the decoloration of three orcein dyes on EPI-DMA/Bt were much better than on Na- Bentonites. The relationship between adsorptive capacity （qe） and equilibrium concentration （Ce） fitted the isothermal adsorption equations of Langmuir and Freundlich. The adsorption dynamics followed the law of Langmuir equation.

关 键 词：聚环氧氯丙烷二甲胺 阳离子聚合物/膨润土纳米复合吸附材料 吸附 红色染料 

分 类 号：X703[环境科学与工程—环境工程] P579[天文地球—矿物学]