Green multi-functional monomer based ion imprinted polymers for selective removal of copper ions from aqueous solution

Liyan Wang; Jinhua Li; Jianan Wang; Xiaotong Guo; Xiaoyan Wang; Jaebum Choo; Lingxin Chen

doi:10.1016/j.jcis.2019.01.081

Green multi-functional monomer based ion imprinted polymers for selective removal of copper ions from aqueous solution

J Colloid Interface Sci. 2019 Apr 1:541:376-386. doi: 10.1016/j.jcis.2019.01.081. Epub 2019 Jan 22.

Authors

Liyan Wang¹, Jinhua Li², Jianan Wang³, Xiaotong Guo⁴, Xiaoyan Wang², Jaebum Choo⁵, Lingxin Chen⁶

Affiliations

¹ CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China; Department of Polymer Chemistry, Yantai Engineering & Technology College, Yantai 264006, China.
² CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
³ School of Civil Engineering, Yantai University, Yantai 264005, China.
⁴ CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China.
⁵ Department of Chemistry, Chung-Ang University, Seoul 06974, South Korea. Electronic address: jbchoo@cau.ac.kr.
⁶ CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Research Center for Coastal Environmental Engineering and Technology, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. Electronic address: lxchen@yic.ac.cn.

PMID: 30710820
DOI: 10.1016/j.jcis.2019.01.081

Abstract

Green ion imprinted polymers (IIPs) were prepared in aqueous phase via the synergy of three functional monomers of low-cost eco-friendly gelatin (G), 8-hydroxyquinoline (HQ) and chitosan (C), namely G-HQ-C IIPs, and were applied as an effective and recyclable adsorbent to remove Cu(II) from aqueous solution. The as-prepared G-HQ-C IIPs were systematically characterized, and several major factors affecting adsorption capacity including solution pH, temperature and contact time were investigated in detail. The adsorption of Cu(II) on G-HQ-C IIPs followed the pseudo-second-order kinetic and Langmuir isotherm models, and the adsorption capacity increased with temperature increase. Moreover, the maximum adsorption capacities of G-HQ-C IIPs toward Cu(II) reached up to 111.81 mg/g at room temperature, much higher than those of most of the reported adsorbents for Cu(II). The G-HQ-C IIPs displayed excellent selectivity against seven common divalent ions with selectivity coefficients above 18.71, as well as high anti-interference ability. Additionally, a good reusability was demonstrated without significant loss in adsorption capacity after at least ten cycles. The IIPs were applied to environmental water samples for selective removal of Cu(II) with satisfactory results. By replacing Cu(II) template by Cd(II), Hg(II) and Pb(II), respectively, the obtained three kinds of IIPs based on G-HQ-C presented convincing imprinting properties, and therefore the work could provide a simple and general imprinting strategy toward various concerned heavy metal ions through multi-point interactions from multiple functional monomers.

Keywords: Aqueous solution; Cu(II) removal; Green synthesis; Ion imprinted polymers; Multi-functional monomer imprinting.