Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.watres.2013.04.056
Title: Inactivation/reactivation of antibiotic-resistant bacteria by a novel UVA/LED/TiO2 system
Authors: Xiong, P.
Hu, J. 
Keywords: Antibiotic-resistant bacteria
Inactivation
Periodic illumination
Reactivation
UVA/LED
Issue Date: 1-Sep-2013
Citation: Xiong, P., Hu, J. (2013-09-01). Inactivation/reactivation of antibiotic-resistant bacteria by a novel UVA/LED/TiO2 system. Water Research 47 (13) : 4547-4555. ScholarBank@NUS Repository. https://doi.org/10.1016/j.watres.2013.04.056
Abstract: In this study, an effective photocatalytic disinfection system was established using the newly emerged high power UVA/LED lamp. Crystallizing dish coated with TiO2 was prepared by 32-times impregnation-drying processes, and served as the supporting container for water samples. This study focused on the application of this UVA/LED system for the photocatalytic disinfection of selected antibiotic-resistant bacteria, Escherichia coli ATCC 700891. The disinfection performances were studied under various light intensities and illumination modes. Results show that higher light intensity could reach more significant inactivation of E. coli ATCC 700891. With the same UV dose, log-removal of antibiotic-resistant bacteria decreased with circle time in the studied range, while increased with duty circle. A "residual disinfecting effect" was found in the following dark period for bacteria collected at different phases of photocatalytic process. Residual disinfecting effect was found not significant for bacteria with 30min periodic illumination. While residual disinfecting effect could kill almost all bacteria after 90min UV periodic illumination within the following 240min dark period. © 2013 Elsevier Ltd.
Source Title: Water Research
URI: http://scholarbank.nus.edu.sg/handle/10635/91017
ISSN: 00431354
DOI: 10.1016/j.watres.2013.04.056
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