乙二胺螯合树脂对Cu(Ⅱ)和Cd(Ⅱ)的吸附性能研究  

Adsorption Properties of Ethylenediamine Chelating Resin for Cu(Ⅱ)and Cd(Ⅱ)

作　　者：陈佑宁[1] 王敏 常冰杰 CHEN Youning;WANG Min;CHANG Bingjie(College of Chemistry and Chemical Engineering,Xianyang Normal College,Xianyang 712000,China)

机构地区：[1]咸阳师范学院化学与化工学院,陕西咸阳712000

出　　处：《皮革与化工》2024年第4期24-29,共6页Leather And Chemicals

基　　金：咸阳市科技计划项目(L2022-XCZX-002);咸阳师范学院青蓝人才项目(XSYQL201710);大学生创新创业训练计划项目(202310722055);陕西省科技计划项目(2024GX-YBXM-396)。

摘　　要：采用表面引发原子转移自由基聚合(SI-ATRP)将甲基丙烯酸缩水甘油酯(GMA)接枝到氯甲基化聚苯乙烯树脂(PS-CH2Cl)表面,再经环氧基和氨基的开环反应,制备了一种乙二胺螯合树脂(PEDA-g-PS)。采用红外光谱、扫描电镜和元素分析对树脂进行了表征,考查了树脂对Cu(Ⅱ)和Cd(Ⅱ)的吸附性能。通过分析溶液pH对吸附容量的影响、吸附等温线和吸附动力学曲线,证明Cu(Ⅱ)和Cd(Ⅱ)在PEDA-g-PS树脂上的吸附属于Langmuir单层吸附模型,符合准二级动力学方程。pH3.0时,树脂对Cu(Ⅱ)和Cd(Ⅱ)的最大吸附量可达1.19和1.95 mmol/g,经过10次吸附-解吸循环实验,树脂的吸附容量无显著变化,表明树脂对重金属离子具有优异的吸附性能以及优良的重复使用性能。A novel ethylenediamine chelating resin was prepared by grafting poly(glycidyl methacrylate)onto the chloromethylated polystyrene beads via surface-initiated atom transfer radical polymerization(SI-ATRP),and followed by the Open loop reaction of epoxy and amine groups.The resin was characterized by infrared spectroscopy,scanning electron microscopy and elemental analysis.The adsorption of the resin on Cu(Ⅱ)and Cd(Ⅱ)was examined.By analyzing the influence of solution pH on the adsorption capacity,adsorption isotherm and adsorption kinetics curve,the adsorption of Cu(Ⅱ)and Cd(Ⅱ)on PEDA-g-PS resin is proved to be Langmuir single-layer adsorption model,and adsorption process conforms to pseudo-second-order kinetic equation.The maximum sorption capacities of Cu(Ⅱ)and Cd(Ⅱ)were 1.19 and 1.95 mmol/g at pH3.0.After 10 adsorption-desorption cycles,the adsorption capacity of the resin did not change significantly,indicating that the resin has excellent adsorption properties for heavy metal ions and excellent reusability.

关 键 词：氯甲基化聚苯乙烯树脂 表面引发原子转移自由基聚合 重金属离子 吸附 

分 类 号：O631[理学—高分子化学] O647.3[理学—化学]