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Anti-biofouling property and anti-leaching investigation of modifier for PVDF ultrafiltration membrane by incorporating antibacterial graphene oxide derivatives.

Authors :
Geng, Chengbao
Zhao, Fangbo
Wang, Qiang
Zheng, Shuai
Liu, Yang
Niu, Hongyan
Zhang, Jiaming
Dong, Hongxing
Source :
Journal of Environmental Chemical Engineering; Dec2022, Vol. 10 Issue 6, pN.PAG-N.PAG, 1p
Publication Year :
2022

Abstract

To improve the anti-biofouling property of polyvinylidene fluoride (PVDF) membrane, three kinds of antibacterial graphene oxide (GO) derivatives were prepared, including imidazole-functionalized GO (Im-GO) and quaternized GO (Q-GO) synthesized by chemical grafting method, and GO loaded with silver nanoparticles (GO-Ag) synthesized by in-site reduction method. The structural characteristics and antibacterial abilities of three kinds of GO derivatives were characterized and investigated. It was demonstrated that GO could be used as a good carrier to prepare the anti-biofouling modifiers. Correspondingly, Im-GO/PVDF, Q-GO/PVDF, and GO-Ag/PVDF ultrafiltration membranes were fabricated using the phase inversion method. In contrast with the blank PVDF membrane, all the GO derivatives/PVDF membranes showed greatly improved permeability and anti-biofouling property. Significantly, the inhibition zone test and fluorescence staining experiment were carried out to investigate the differences between Im-GO, Q-GO, and GO-Ag in the antibacterial mechanisms. The corresponding results suggest that the imidazole and quaternary ammonium salt groups grafted on Im-GO and Q-GO possess great anti-leaching characteristics, while the loss of Ag<superscript>+</superscript> from GO-Ag is relatively obvious. Therefore, Im-GO and Q-GO synthesized by chemical grafting method have greater potential as the anti-biofouling membrane modifiers, considering the accumulation of harmful ions in water and possible reduction in antibacterial stability for GO-Ag. [Display omitted] • Im-GO, Q-GO, and GO-Ag with good antibacterial property were synthesized. • Im-GO, Q-GO, and GO-Ag were used as the anti-biofouling modifiers for membranes. • The anti-leaching characteristics of anti-biofouling modifiers were investigated. • Im-GO and Q-GO exhibited better anti-leaching characteristics than GO-Ag. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
22133437
Volume :
10
Issue :
6
Database :
Supplemental Index
Journal :
Journal of Environmental Chemical Engineering
Publication Type :
Academic Journal
Accession number :
160535584
Full Text :
https://doi.org/10.1016/j.jece.2022.108558