Facile synthesis of degradable CA/CS imprinted membrane by hydrolysis polymerization for effective separation and recovery of Li

Jiuyun Cui; Zhiping Zhou; Atian Xie; Siwei Liu; Qianqian Wang; Yilin Wu; Yongsheng Yan; Chunxiang Li

doi:10.1016/j.carbpol.2018.10.094

Facile synthesis of degradable CA/CS imprinted membrane by hydrolysis polymerization for effective separation and recovery of Li

Carbohydr Polym. 2019 Feb 1:205:492-499. doi: 10.1016/j.carbpol.2018.10.094. Epub 2018 Oct 29.

Authors

Jiuyun Cui¹, Zhiping Zhou¹, Atian Xie², Siwei Liu¹, Qianqian Wang², Yilin Wu², Yongsheng Yan², Chunxiang Li³

Affiliations

¹ School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.
² Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
³ Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China. Electronic address: lcx@mail.ujs.edu.cn.

PMID: 30446133
DOI: 10.1016/j.carbpol.2018.10.094

Abstract

Lithium resources are attractive for different applications because of their specific properties. Therefore, it is more significant to find a cost-effective and environment-friendly method to selective adsorption and recovery of Li⁺. In this work, a renewable and easy degradable CA/CS hybrid membrane was modified with polydopamine as adhesion layer to anchored TiO₂. The simple imprinting process could be realized by hydrolysis polymerization. The adsorption process followed Langmuir isotherm model and pseudo-second-order kinetic equation were researched in detail. The results displayed the maximum adsorption capacity is 20.08 mg g^-1 for Li⁺. The selectivity factors of Li⁺ to Na⁺, K⁺, Mg²⁺ and Ca²⁺ are 1.78, 2.43, 2.60 and 3.61, respectively, which mainly attributed to imprinting effect. The LIICMs also exhibited the superior reusability and durability. Thus, the LIICMs provide a powerful tool for selective separation and recovery of Li⁺ from mixed solutions.

Keywords: Degradable hybrid membrane; Environment-friendly method; Ion imprinted; Lithium; Permselectivity.