Chitosan-based hollow nanofiber membranes with polyvinylpyrrolidone and polyvinyl alcohol for efficient removal and filtration of organic dyes and heavy metals

Shuping Wu; Weijian Shi; Kanghui Li; Jiawei Cai; Chao Xu; Lei Gao; Jianwei Lu; Fuyuan Ding

doi:10.1016/j.ijbiomac.2023.124264

Chitosan-based hollow nanofiber membranes with polyvinylpyrrolidone and polyvinyl alcohol for efficient removal and filtration of organic dyes and heavy metals

Int J Biol Macromol. 2023 Jun 1:239:124264. doi: 10.1016/j.ijbiomac.2023.124264. Epub 2023 Mar 30.

Authors

Shuping Wu¹, Weijian Shi², Kanghui Li², Jiawei Cai², Chao Xu², Lei Gao³, Jianwei Lu², Fuyuan Ding⁴

Affiliations

¹ Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China. Electronic address: shupingwu@ujs.edu.cn.
² Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
³ School of Marine Science and Engineering, Nanjing Normal University, Nanjing, Jiangsu Province 210023, China. Electronic address: gaolei@nnu.edu.cn.
⁴ School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.

PMID: 37003384
DOI: 10.1016/j.ijbiomac.2023.124264

Abstract

Due to their large specific surface area and numerous diffusion channels, hollow fibers are widely used in wastewater treatment. In this study, we successfully synthesized a chitosan (CS)/polyvinylpyrrolidone (PVP)/polyvinyl alcohol (PVA) hollow nanofiber membrane (CS/PVP/PVA-HNM) via coaxial electrospinning. This membrane demonstrated remarkable permeability and adsorption separation. Specifically, the CS/PVP/PVA-HNM had a pure water permeability of 4367.02 L·m^-2·h^-1·bar^-1. The hollow electrospun nanofibrous membrane exhibited a continuous interlaced nanofibrous framework structure with the extraordinary advantages of high porosity and high permeability. The rejection ratios of CS/PVP/PVA-HNM for Cu²⁺, Ni²⁺, Cd²⁺, Pb²⁺, malachite green (MG), methylene blue (MB) and crystal violet (CV) were 96.91 %, 95.29 %, 87.50 %, 85.13 %, 88.21 %, 83.91 % and 71.99 %, and the maximum adsorption capacities were 106.72, 97.46, 88.10, 87.81, 53.45, 41.43, and 30.97 mg·g^-1, respectively. This work demonstrates a strategy for the synthesis of hollow nanofibers, which provides a novel concept for the design and fabrication of highly efficient adsorption and separation membranes.

Keywords: Adsorption separation membrane; Chitosan; Electrospun nanofiber; Hollow fibers; Water treatment.

MeSH terms

Chitosan* / chemistry
Coloring Agents
Metals, Heavy*
Nanofibers* / chemistry
Polyvinyl Alcohol / chemistry
Povidone

Substances

Chitosan
Polyvinyl Alcohol
Povidone
Metals, Heavy
Coloring Agents