Simultaneous removal of U(VI) and Re(VII) by highly efficient functionalized ZIF-8 nanosheets adsorbent

Jie Li; Zheng Wu; Qingyun Duan; Xuede Li; Ying Li; Hamed Alsulami; Mohammed Sh Alhodaly; Tasawar Hayat; Yubing Sun

doi:10.1016/j.jhazmat.2020.122398

Simultaneous removal of U(VI) and Re(VII) by highly efficient functionalized ZIF-8 nanosheets adsorbent

J Hazard Mater. 2020 Jul 5:393:122398. doi: 10.1016/j.jhazmat.2020.122398. Epub 2020 Feb 24.

Authors

Jie Li¹, Zheng Wu¹, Qingyun Duan¹, Xuede Li¹, Ying Li², Hamed Alsulami³, Mohammed Sh Alhodaly³, Tasawar Hayat³, Yubing Sun⁴

Affiliations

¹ School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, PR China.
² MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
³ Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
⁴ MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China. Electronic address: sunyb@ipp.ac.cn.

PMID: 32131037
DOI: 10.1016/j.jhazmat.2020.122398

Abstract

The simultaneously efficient removal of cationic and anionic radionuclides is an important and challenging topic for nuclear waste remediation as well as environmental protection. Herein, monoclinic ZIF-8 nanosheets modified with ethyleneimine polymer (denoted as ZIF-8/PEI) was achieved and used to determine the capture behaviors of both U(VI) oxycations and Re(VII) oxyanions from aqueous solution. ZIF-8/PEI assemblies showed a maximum U(VI) and Re(VII) uptake capacity of 665.3 (pH 5.0) and 358.2 mg/g (pH 3.5), respectively. Experimental, spectroscopic and theoretical calculation results directly unraveled that U(VI) adsorption onto ZIF-8/PEI assemblies was mainly ascribed to the coordination with abundant amino groups and weakly due to the Zn terminal hydroxyl groups, while anion exchange mechanism contributed predominantly to the Re(VII) sequestration. This work not only sheds light on the interaction mechanisms of simultaneous capture of U(VI) and Re(VII) but also highlights the versatile material design of cationic and anionic radionuclide immobilization in radioactive wastewater remediation.

Keywords: Polyethyleneimine; Re(VII) oxyanions; Simultaneous removal; U(VI) oxycations; ZIF-8 nanosheets.

Publication types

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