SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 54 ›› Issue (2): 1-10.DOI: 10.1016/j.cjche.2022.04.011

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

Zhongqi Ren, Jie Wang, Hewei Zhang, Fan Zhang, Shichao Tian, Zhiyong Zhou   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2021-11-13 Revised:2022-04-22 Online:2023-05-11 Published:2023-02-28
  • Contact: Zhiyong Zhou,E-mail:zhouzy@mail.buct.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22125802 and 22078010), Beijing Natural Science Foundation (2222017) and Big Science Project from BUCT (XK180301). The authors gratefully acknowledge these grants.

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

Zhongqi Ren, Jie Wang, Hewei Zhang, Fan Zhang, Shichao Tian, Zhiyong Zhou   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Zhiyong Zhou,E-mail:zhouzy@mail.buct.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22125802 and 22078010), Beijing Natural Science Foundation (2222017) and Big Science Project from BUCT (XK180301). The authors gratefully acknowledge these grants.

Abstract: 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.

Key words: Surface-imprinted material, Adsorption, Aqueous solution, Silica, Selectivity

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