Adsorption of rubidium ion from aqueous solution by surface ion imprinted materials  

作　　者：Zhongqi Ren Jie Wang Hewei Zhang Fan Zhang Shichao Tian Zhiyong Zhou 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第2期1-10,共10页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(22125802 and 22078010);Beijing Natural Science Foundation(2222017);Big Science Project from BUCT(XK180301)。

摘　　要：A new type of rubidium ion-imprinted polymer has been synthesized by the surface-imprinting technique using methacrylic acid as the functional monomer,the rubidium ion as the template,methanol as the solvent,and silica as a carrier.Ethylene glycol dimethacrylate and 2,2-azobisisobutyronitrile were used as acrosslinker and an initiator,respectively.In addition,based on the macrocyclic effect of crown ethers,the 18-crown-6 ligand was introduced as a ligand to fix the template ions better.Scanning electron microscopy,zeta-potential analysis,Fourier transform infrared spectroscopy,thermogravimetric analysis,and X-ray photoelectron spectroscopy were performed to characterize the ion-imprinted polymer.The effects of the preparation and adsorption conditions on the adsorption performance of the rubidium ion-imprinted polymer were investigated.The results indicated that the rubidium ion-imprinted polymer has high selectivity and faster kinetics than other adsorbents,with an equilibrium adsorption capacity of 200.19 mg·g^(-1)at 298 K within 25 min.The sorption isotherm was well described by the Freundlich isotherm model,while the adsorption kinetics fitted the pseudo-second-order kinetic model.Consecutive adsorption-desorption experiments showed that the ion-imprinted polymer had good chemical stability and reusability.

关 键 词：Surface-imprinted material ADSORPTION Aqueous solution Silica Selectivity 

分 类 号：TS396.5[轻工技术与工程] TQ424[化学工程]