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Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light

Photocatalytic inactivation of six different species of bacteria using fluorescent light and TiO2 was conducted. Up to five surface loadings of TiO2 varying from 234-8662 mg/m2, impregnated on membrane filters were used with fluorescent light of constant illuminance of 3900 Lux for the inactivation...

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主要な著者: Pal, Amrita, Pehkonen, Simo O., Yu, Liya E., Ray, Madhumita B.
フォーマット: Conference or Workshop Item
言語:English
出版事項: 2006
主題:
TD Environmental technology. Sanitary engineering
オンライン･アクセス:http://eprints.utm.my/id/eprint/166/1/AmritaPal2006_Tio2mediatedphotocatalyticinactivationof.pdf
http://eprints.utm.my/id/eprint/166/
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spelling my.utm.1662017-08-24T01:14:51Z http://eprints.utm.my/id/eprint/166/ Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light Pal, Amrita Pehkonen, Simo O. Yu, Liya E. Ray, Madhumita B. TD Environmental technology. Sanitary engineering Photocatalytic inactivation of six different species of bacteria using fluorescent light and TiO2 was conducted. Up to five surface loadings of TiO2 varying from 234-8662 mg/m2, impregnated on membrane filters were used with fluorescent light of constant illuminance of 3900 Lux for the inactivation of four ATCC bacteria (E. coli K-12, Pseudomonas fluorescens, Bacillus subtilis and Microbacterium sp.) and two other species of bacteria (Microbacteriaceae str. W7 and Paenibacillus sp. SAFN-007) collected from outdoor air in Singapore. A Gram-negative bacterium E. coli K-12 was the most effectively inactivated, while Gram-positive Bacillus 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 1116-1666 mg/m2. 100% of the E. coli K-12 was inactivated after 30 minutes of treatment at a TiO2 loading of 1666 mg/m2, while inactivation of one log10 was obtained for Microbacterium sp., Paenibacillus sp. SAFN-007 and Microbacteriaceae str. W7 after two hours. Preliminary experiments indicate that the photocatalytic inactivation using Degussa P25 is 1.83-5.41 times higher than that of Hombikat UV-100. 2006-07 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/166/1/AmritaPal2006_Tio2mediatedphotocatalyticinactivationof.pdf Pal, Amrita and Pehkonen, Simo O. and Yu, Liya E. and Ray, Madhumita B. (2006) Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light. In: 1st International Conference on Natural Resources Engineering & Technology 2006, 24-25th July 2006, Putrajaya, Malaysia.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TD Environmental technology. Sanitary engineering
spellingShingle TD Environmental technology. Sanitary engineering
Pal, Amrita
Pehkonen, Simo O.
Yu, Liya E.
Ray, Madhumita B.
Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
description Photocatalytic inactivation of six different species of bacteria using fluorescent light and TiO2 was conducted. Up to five surface loadings of TiO2 varying from 234-8662 mg/m2, impregnated on membrane filters were used with fluorescent light of constant illuminance of 3900 Lux for the inactivation of four ATCC bacteria (E. coli K-12, Pseudomonas fluorescens, Bacillus subtilis and Microbacterium sp.) and two other species of bacteria (Microbacteriaceae str. W7 and Paenibacillus sp. SAFN-007) collected from outdoor air in Singapore. A Gram-negative bacterium E. coli K-12 was the most effectively inactivated, while Gram-positive Bacillus 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 1116-1666 mg/m2. 100% of the E. coli K-12 was inactivated after 30 minutes of treatment at a TiO2 loading of 1666 mg/m2, while inactivation of one log10 was obtained for Microbacterium sp., Paenibacillus sp. SAFN-007 and Microbacteriaceae str. W7 after two hours. Preliminary experiments indicate that the photocatalytic inactivation using Degussa P25 is 1.83-5.41 times higher than that of Hombikat UV-100.
format Conference or Workshop Item
author Pal, Amrita
Pehkonen, Simo O.
Yu, Liya E.
Ray, Madhumita B.
author_facet Pal, Amrita
Pehkonen, Simo O.
Yu, Liya E.
Ray, Madhumita B.
author_sort Pal, Amrita
title Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
title_short Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
title_full Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
title_fullStr Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
title_full_unstemmed Tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
title_sort tio2 mediated photocatalytic inactivation of gram-positive and gram-negative bacteria using fluorescent light
publishDate 2006
url http://eprints.utm.my/id/eprint/166/1/AmritaPal2006_Tio2mediatedphotocatalyticinactivationof.pdf
http://eprints.utm.my/id/eprint/166/
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score 13.251813

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