硅藻土/丙烯酸水凝胶的合成及其对染料孔雀石绿的吸附研究  

Synthesis of diatomite/acrylic acid hydrogel and its adsorption properties for Malachite Green

作　　者：俞洁[1] 张雅迪[1] 李芸[1] 牛韩根[1] 郑继东[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2011年第6期42-47,52,共7页Journal of Northwest Normal University(Natural Science)

基　　金：西北师范大学青年教师科研能力提升计划资助项目(NWNU-LKQN-10-16)

摘　　要：以丙烯酸(AA)和硅藻土(DIA)为原料,N,N′-亚甲基双丙烯酰胺(MBA)为交联剂,在水溶液中利用辉光放电电解等离子体引发一步制得硅藻土/丙烯酸(DIA/AA)复合水凝胶,研究了其对阳离子型染料孔雀石绿(MG)的吸附行为,并考察了pH值、吸附时间、初始浓度等因素对吸附性能的影响.结果表明,最佳的吸附pH为5.6,吸附时间为4h,DIA/AA水凝胶对孔雀石绿的吸附行为符合准二级反应动力学方程和Langmuir吸附等温式.A diatomite/acrylic acid（DIA/AA） hydrogel is prepared in aqueous solution by using glow discharge electrolysis plasma（GDEP） induced graft copolymerization of acrylic acid（AA） on diatomite（DIA）,in which N,N′-methylenebisacrylamide（MBA） is used as a crosslinker.Cationic dye Malachite Green（MG） is used for characterizing adsorption property.Factors influencing the adsorption of MG such as solution pH,contact time,initial concentration are investigated in detail by batch experiments.The results show that the best parameters for the removal of MG are pH 5.6 and the equilibrium contact time 4 h.The adsorption process can be well described by the pseudo-second-order kinetic and the Langmuir model.

关 键 词：辉光放电电解等离子体(GDEP) 硅藻土(DIA) 丙烯酸(AA) 水凝胶 吸附 孔雀石绿(MG) 

分 类 号：O613.6[理学—无机化学] X791[理学—化学]