三维网格状β-环糊精树脂制备及其对Cd2+吸附特性

摘要

采用反相悬浮法,通过接枝共聚合反应,制备了具有三维网格结构的β-环糊精基金属离子吸附树脂.对聚合反应的反应温度、引发剂用量、交联剂用量、丙烯酸中和度等条件进行优化,确定了最佳聚合反应条件.采用FTIR、13CNMR、SEM、DSC等手段表征了产物的物化结构;采用静态法研究了吸附树脂的吸附性能;吸附动力学,分别采用准一阶方程、准二阶方程、Elovich方程、分子间扩散方程拟合.结果表明:每克树脂对质量浓度为80mg/L的Cd2+溶液吸附金属离子容量为78.94mg,去除率为52.69%,树脂对Cd2+的吸附更符合准一阶方程、粒子内扩散方程.%A novel β-cyclodextrin based resin with 3D network was synthesized by the reaction of inverse suspension co-polymerization and graft copolymerization.The physical and chemistry structure of resin was characterized by FTIR, DSC, SEM and 13CNMR.The adsorption behavior of Cd2+ on resin was investigated.Adsorption kinetics data were fitted by pseudo-first-order equation, pseudo-second-order equation, Elovich equation and intra-particle diffusion equation.The adsorption capacity of the resin to 80mg/L Cd2+ is 78.94mg/g.The adsorption data of Cd2+ on resin was well fitted to pseudo-first-order equation and intra-particle diffusion equation.