Performance of novel a Ag-n-TiO2/PVC reinforced hollow fiber membrane applied in water purification: in situ antibacterial properties and resistance to biofouling. Issue 118 (12th November 2015)

• Record Type: Journal Article
• Authors: Yu, Zhenjiang; Zhao, Yuanyuan; Gao, Bing; Liu, Xuyang; Jia, Liming; Zhao, Fangbo; Ma, Jun
• Is Part Of: RSC advances. Volume 5:Issue 118(2015)
• Page Start: 97320
• Page End: 97329
• Publication Date: 2015-11-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra18185b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : To improve the anti-biofouling properties of membranes, Ag-embedded nano-sized titanium dioxide (Ag-n-TiO2 ) particles were utilized as biocidal agents to modify polyvinyl chloride (PVC) membranes. Abstract : To improve the anti-biofouling properties of membranes, Ag-embedded nano-sized titanium dioxide (Ag-n-TiO2 ) particles were utilized as biocidal agents to modify polyvinyl chloride (PVC) membranes. Both Ag-n-TiO2 /PVC flat sheet membranes and reinforced hollow fiber membranes were fabricated by a phase inversion method with varying Ag-n-TiO2 particle concentrations. As a result, the hydrophilicity, permeability, and retention capability increased with Ag-n-TiO2 concentrations from 0 to 1.5 wt%. In addition, the in situ antibacterial and anti-formation of biofilm properties of the modified membranes were greatly enhanced in the conventional inhibition zone test, Escherichia coli ( E. coli ) absorption experiment, fluorescent staining experiment, as well as long-term continuous biofouling test. The best results were obtained for the PVC membrane modified by 1.0 wt% Ag-n-TiO2 . The optimized membrane presented not only better permeability and in situ antibacterial properties in the E. coli adhesion test, but also an enhancement in resisting biofilm formation and a more steady permeation flux in long-term filtration than the unmodified membrane.