fulltext.study @t Gmail

Photocatalytic inactivation of Gram-positive and Gram-negative bacteria using fluorescent light

Paper ID Volume ID Publish Year Pages File Format Full-Text
28368 44071 2007 7 PDF Available
Title
Photocatalytic inactivation of Gram-positive and Gram-negative bacteria using fluorescent light
Abstract

A batch photocatalytic study was carried out to inactivate six different species of bacteria using fluorescent light and TiO2 photocatalyst. Several surface loadings of TiO2 varying from 234 to 8662 mg/m2, impregnated on membrane filters were used with fluorescent light of constant illuminance of 3900 lux for the inactivation of four ATCC bacteria (Escherichia coli K-12, Pseudomonas fluorescens, Bacillus subtilis and Microbacterium sp.) and two other species of bacteria collected from outdoor air in Singapore (Microbacteriaceae str. W7 and Paenibacillus sp. SAFN-007). Gram-negative bacterium E. coli K-12 was the most effectively inactivated, while Gram-positive B. subtilis exhibited the least response to the photocatalytic treatment. The inactivation rate increased with an increase in the TiO2 loading, the maximum inactivation of most bacteria was achieved at an optimum TiO2 loading of 511–1666 mg/m2, corresponding to a thickness of 294–438 nm of TiO2 layer on the surface. 100% of the E. coli K-12 was inactivated after 30 min of treatment at a TiO2 loading of 1666 mg/m2, while inactivation of 1 log10 was obtained for Microbacterium sp., Paenibacillus sp. SAFN-007 and Microbacteriaceae str. W7 after 2 h of illumination at a TiO2 loading of 1116 mg/m2.

Keywords
TiO2; Fluorescent light; Inactivation rate; E. coli K-12; Pseudomonas fluorescens; Bacillus subtilis; Microbacterium sp.; Microbacteriaceae str. W7; Paenibacillus sp. SAFN-007
First Page Preview
Photocatalytic inactivation of Gram-positive and Gram-negative bacteria using fluorescent light
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 186, Issues 2–3, 25 February 2007, Pages 335–341
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us