Bionic chitosan-carbon imprinted aerogel for high selective recovery of Gd(Ⅲ) from end-of-life rare earth productions

Yuzhe Zhang; Tingting Bian; Rong Jiang; Yi Zhang; Xudong Zheng; Zhongyu Li

doi:10.1016/j.jhazmat.2020.124347

Bionic chitosan-carbon imprinted aerogel for high selective recovery of Gd(Ⅲ) from end-of-life rare earth productions

J Hazard Mater. 2021 Apr 5:407:124347. doi: 10.1016/j.jhazmat.2020.124347. Epub 2020 Oct 22.

Authors

Yuzhe Zhang¹, Tingting Bian¹, Rong Jiang¹, Yi Zhang¹, Xudong Zheng², Zhongyu Li³

Affiliations

¹ School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, PR China.
² School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, PR China; Jiangsu Engineering Research Center of Petrochemical Safety and Environmental Protection, Changzhou 213164, PR China. Electronic address: zhengks@outlook.com.
³ School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, PR China; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China; Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, PR China. Electronic address: zhongyuli@mail.tsinghua.edu.cn.

PMID: 33144020
DOI: 10.1016/j.jhazmat.2020.124347

Abstract

High selective recovery of Gd(Ⅲ) from end-of-life rare earth productions is essential for cleaner production. Chitosan(CS), a biomaterial, has shown excellent results in water treatment. The amino and hydroxyl groups on the surface of CS play a vital role in adsorbing metal ions. Polydopamine has good stability, strong water dispersibility, and excellent biocompatibility. As a bio-crosslinking agent, the amino and phenolic hydroxyl groups on its surface can be combined with metal ions to help the material absorb metal ions. This paper combines the active groups of biomimetic materials and the mechanical properties of new nanomaterials multi-walled carbon nanotubes and graphene oxide, and prepared a high-performance chitosan-based aerogel MWCNT-PDA-CS-GO through heat and mass transfer at low temperature and low pressure. The adsorption mechanism of MWCNT-PDA-CS-GO for Gd(Ⅲ) was analyzed through a series of characterization and adsorption experiments. At pH 7.0, the maximum adsorption capacity of aerogel for Gd(Ⅲ) reached 150.86 mg g^-1. The relative selectivity of imprinted ions is 48.02 times higher than other ions. All the results indict MWCNT-PDA-CS-GO aerogel exhibits excellent selectivity and stability for effective recovery of Gd(Ⅲ).

Keywords: Aerogel; Chitosan; Ion imprinted; New carbon Materials; Polydopamine.

Publication types

Research Support, Non-U.S. Gov't