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DISINFECTION OF E. coli CONTAMINATED WATER USING TUNGSTEN TRIOXIDE-BASED PHOTOELECTROCATALYSIS
Autori: Efetobor Scott-Emuakpor
Data aparitiei: Aprilie / 2016
Revista: Environmental Engineering and Management JournalVol. 15Nr. 4
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.

Semi-conductor oxide enhanced photocatalysis is a sustainable technology suitable for disinfection of water contaminated with
pathogens. Disinfection of Escherichia coli was investigated using an immobilized thin film tungsten trioxide (WO3)
photocatalyst in a visible light-driven photoelectrocatalytic batch cell (PECB). Disinfection efficiency was monitored under dark
electrocatalytic, photolytic and photoelectrocatalytic conditions and assessed using a culture-based approach. Optimal
disinfection efficiency (>99 % within 15 minutes) occurred when the WO3 catalyst was illuminated under closed circuit
conditions. Non-detection of colony forming units showed no re-growth of the pathogen during post-irradiation studies,
indicating cell death. The WO3 photocatalyst is a potentially useful disinfection technology as its utilization of visible parts of the
solar spectrum optimizes solar energy for treatment of contaminated waters.



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