Photocatalytic Reactive Ultrafiltration Membrane for Removal of Antibiotic Resistant Bacteria and Antibiotic Resistance Genes from Wastewater Effluent

Biological wastewater treatment is not effective in removal of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs). In this study, we fabricated a photocatalytic reactive membrane by functionalizing polyvinylidene fluoride (PVDF) ultrafiltration (UF) membrane with titanium oxi...

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Bibliographic Details
Published in:Environmental science & technology 2018-08, Vol.52 (15), p.8666-8673
Main Authors: Ren, Shaojie, Boo, Chanhee, Guo, Ning, Wang, Shuguang, Elimelech, Menachem, Wang, Yunkun
Format: Article
Language:English
Subjects:
Antibiotic resistance
Antibiotics
Antifouling substances
Bacteria
Biodegradation
Biological treatment
Biological wastewater treatment
Drug resistance
Effluents
Filters
Fluorides
Genes
Genomes
Horizontal transfer
Irradiation
Nanoparticles
Photocatalysis
Photodegradation
Polyvinylidene fluorides
Secondary wastewater
Titanium dioxide
Titanium oxide
Titanium oxides
Ultrafiltration
Ultraviolet radiation
Wastewater treatment
Water treatment
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Summary:Biological wastewater treatment is not effective in removal of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs). In this study, we fabricated a photocatalytic reactive membrane by functionalizing polyvinylidene fluoride (PVDF) ultrafiltration (UF) membrane with titanium oxide (TiO2) nanoparticles for the removal of ARB and ARGs from a secondary wastewater effluent. The TiO2-modified PVDF membrane provided complete retention of ARB and effective photocatalytic degradation of ARGs and integrons. Specifically, the total removal efficiency of ARGs (i.e., plasmid-mediated floR, sul1, and sul2) with TiO2-modified PVDF membrane reached ∼98% after exposure to UV irradiation. Photocatalytic degradation of ARGs located in the genome was found to be more efficient than those located in plasmid. Excellent removal of integrons (i.e., intI1, intI2, and intI3) after UV treatment indicated that the horizontal transfer potential of ARGs was effectively controlled by the TiO2 photocatalytic reaction. We also evaluated the antifouling properties of the TiO2–UF membrane to demonstrate its potential application in wastewater treatment.
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.8b01888