胺基树脂的合成及对水中重金属离子的吸附特征  

Synthesis of amine resin and its adsorption properties for heavy metal ions in water

作　　者：张青梅[1,2] 郑寿荣[1] 王家宏[1] 许昭怡[1] 刘湛[2] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093 [2]湖南省环境保护科学研究院,水污染控制技术湖南省重点实验室,长沙410004

出　　处：《环境工程学报》2010年第12期2657-2661,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(40402022);江苏省科技项目(BK2005417,BS2007100);国家高技术研究发展计划(863)项目(2006AA06Z383);国家科技支撑计划项目(2006BAC02A15);国家水体污染控制与治理科技重大专项(2009ZX07212-001-07)

摘　　要：研究了使用氯甲基化聚苯乙烯交联微球为前驱体与二乙烯三胺经回流反应合成胺基树脂及其对水中Cd2＋和Ni2＋的吸附特征。结果表明,胺基官能团成功地嫁接到树脂表面,胺基含量为5.6 mmol/g。胺基树脂对Cd2＋和Ni2＋的吸附等温线表明,温度的升高有利于吸附,且吸附等温线都符合Langmuir模型。pH值对吸附的影响较大,最佳吸附pH值范围为4~6。2种金属离子在胺基树脂上的吸附都符合准二级动力学方程。Amine resin was prepared via the reaction between chloromethylated polystyrene resin and diethylenetriamine under refluxing conditions.Adsorption properties for Cd2＋ and Ni2＋ were described.Results showed that amino groups were successfully grafted on resin surface and the content of amino groups in the grafted resin was 5.6 mmol/g.The adsorption isotherms of Cd2＋ and Ni2＋ over amine resin were measured.Temperature rising was advantageous to adsorption.Cd2＋ and Ni2＋ adsorption behaviors could be well described using the Langmuir adsorption model.Heavy metals adsorption capacities were dependent on solution pH.The best adsorption behaviors of the resin were observed in pH ranging from 4 to 6.The kinetics of Cd2＋ and Ni2＋ adsorption onto the amine resin could be well described by pseudo-second order kinetics model.

关 键 词：胺基树脂 氯甲基化聚苯乙烯交联微球 吸附 Cd2+ NI2+ 

分 类 号：X703.1[环境科学与工程—环境工程]