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Cited 398 time in webofscience Cited 436 time in scopus
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dc.contributor.authorCho, M-
dc.contributor.authorChung, HM-
dc.contributor.authorChoi, WY-
dc.contributor.authorYoon, JY-
dc.date.accessioned2015-06-25T01:02:52Z-
dc.date.available2015-06-25T01:02:52Z-
dc.date.created2009-02-28-
dc.date.issued2005-01-
dc.identifier.issn0099-2240-
dc.identifier.other2015-OAK-0000004814en_US
dc.identifier.urihttps://oasis.postech.ac.kr/handle/2014.oak/9353-
dc.description.abstractDespite a wealth of experimental evidence concerning the efficacy of the biocidal action associated with the TiO2 photocatalytic reaction, our understanding of the photochemical mechanism of this particular biocidal action remains largely unclear. It is generally accepted that the hydroxyl radical (-OH), which is generated on the surface of UV-illuminated TiO2 plays the main role. However, our understanding of the exact mode of action of the hydroxyl radical in killing microorganisms is far from complete, and some studies report that other reactive oxygen species (ROS) (H2O2 and O(2)(.-)etc.) also play significant roles. In particular, whether hydroxyl radicals remain bound to the surface or diffuse into the solution bulk is under active debate. In order to examine the exact mode of action of ROS in inactivating the microorganism, we tested and compared the levels of photocatalytic inactivation of MS-2 phage and Escherichia coli as representative species of viruses and bacteria, respectively. To compare photocatalytic microbial inactivation with the photocatalytic chemical degradation reaction, para-chlorobenzoic acid, which rapidly reacts with a hydroxyl radical with a diffusion-limited rate, was used as a probe compound. Two different hydroxyl radical scavengers, tert-butanol and methanol, and an activator of the bulk phase hydroxyl radical generation, Fe2+, were used to investigate their effects on the photocatalytic mode of action of the hydroxyl radical in inactivating the microorganism. The results show that the biocidal modes of action of ROS are very different depending on the specific microorganism involved, although the reason for this is not clear. It seems that MS-2 phage is inactivated mainly by the free hydroxyl radical in the solution bulk but that E. coli is inactivated by both the free and the surface-bound hydroxyl radicals. E. coli might also be inactivated by other ROS, such as O-2(.-) and H2O2, according to the present results.-
dc.description.statementofresponsibilityopenen_US
dc.languageEnglish-
dc.publisherAMER SOC MICROBIOLOGY-
dc.relation.isPartOfAPPLIED AND ENVIRONMENTAL MICROBIOLOGY-
dc.rightsBY_NC_NDen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.0/kren_US
dc.titleDifferent inactivation Behaviors of MS-2 phage and Escherichia coli in TiO2 photocatalytic disinfection-
dc.typeArticle-
dc.contributor.college환경공학부en_US
dc.identifier.doi10.1128/AEM.71.1.270-275.2005-
dc.author.googleCho, Men_US
dc.author.googleChung, HMen_US
dc.author.googleYoon, JYen_US
dc.author.googleChoi, WYen_US
dc.relation.volume71en_US
dc.relation.issue1en_US
dc.relation.startpage270en_US
dc.relation.lastpage275en_US
dc.contributor.id10105056en_US
dc.relation.journalAPPLIED AND ENVIRONMENTAL MICROBIOLOGYen_US
dc.relation.indexSCI급, SCOPUS 등재논문en_US
dc.relation.sciSCIen_US
dc.collections.nameJournal Papersen_US
dc.type.rimsART-
dc.identifier.bibliographicCitationAPPLIED AND ENVIRONMENTAL MICROBIOLOGY, v.71, no.1, pp.270 - 275-
dc.identifier.wosid000226458800033-
dc.date.tcdate2019-01-01-
dc.citation.endPage275-
dc.citation.number1-
dc.citation.startPage270-
dc.citation.titleAPPLIED AND ENVIRONMENTAL MICROBIOLOGY-
dc.citation.volume71-
dc.contributor.affiliatedAuthorChoi, WY-
dc.identifier.scopusid2-s2.0-12244258226-
dc.description.journalClass1-
dc.description.journalClass1-
dc.description.wostc296-
dc.type.docTypeArticle-
dc.subject.keywordPlusBACTERICIDAL ACTIVITY-
dc.subject.keywordPlusTHIN-FILM-
dc.subject.keywordPlusWATER-
dc.subject.keywordPlusDEGRADATION-
dc.subject.keywordPlusMECHANISM-
dc.subject.keywordPlusDETOXIFICATION-
dc.subject.keywordPlusSUSPENSIONS-
dc.subject.keywordPlusOXIDATION-
dc.subject.keywordPlusRADICALS-
dc.relation.journalWebOfScienceCategoryBiotechnology & Applied Microbiology-
dc.relation.journalWebOfScienceCategoryMicrobiology-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalResearchAreaBiotechnology & Applied Microbiology-
dc.relation.journalResearchAreaMicrobiology-

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최원용CHOI, WONYONG
Div of Environmental Science & Enginrg
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