A novel carboxylated polyacrylonitrile nanofibrous membrane with high adsorption capacity for fluoride removal from water

Xin Chen; Caixia Wan; Rui Yu; Lingpu Meng; Daoliang Wang; Wei Chen; Tao Duan; Liangbin Li

doi:10.1016/j.jhazmat.2021.125113

A novel carboxylated polyacrylonitrile nanofibrous membrane with high adsorption capacity for fluoride removal from water

J Hazard Mater. 2021 Jun 5:411:125113. doi: 10.1016/j.jhazmat.2021.125113. Epub 2021 Jan 15.

Authors

Xin Chen¹, Caixia Wan², Rui Yu², Lingpu Meng², Daoliang Wang³, Wei Chen², Tao Duan⁴, Liangbin Li⁵

Affiliations

¹ National Synchrotron Radiation Lab, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China; National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, China.
² National Synchrotron Radiation Lab, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China.
³ National Synchrotron Radiation Lab, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address: dlwang@ustc.edu.cn.
⁴ National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621010, China.
⁵ National Synchrotron Radiation Lab, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address: lbli@ustc.edu.cn.

PMID: 33858093
DOI: 10.1016/j.jhazmat.2021.125113

Abstract

To deal with the drinking water safety caused by fluoride, a novel carboxylated polyacrylonitrile nanofibrous membrane (C-PAN NFM) is designed and fabricated massively for the first time by adopting synchronously biaxial stretching and carboxylation. The C-PAN NFM is composed of the layered stack structure by cross-linked nanofibers. Due to its high specific surface area, excellent hydrophilicity, a large amount of carboxyl and amine groups, C-PAN NFM owns high fluoride adsorption capacity and outstanding selectivity. Both the carboxylation and acid treatment of C-PAN NFM improved the fluoride adsorption capacity remarkably. Specifically, C-PAN NFM shows excellent reusability without secondary pollution. The fluoride adsorption behavior of C-PAN NFM is dominated by chemical adsorption, and the adsorption mechanism is mainly driven by hydrogen bonding and ion exchange. The mass-produced C-PAN NFM is a novel polyacrylonitrile-based porous membrane that shows a great application potential for fluoride removal with good efficiency and recyclability.

Keywords: Carboxylated polyacrylonitrile nanofibrous membrane; Fluoride removal; Secondary pollution; Selectivity and reusability; Synchronously biaxial stretching.

Publication types

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