Visible-light-driven photocatalytic inactivation of Escherichia coli by magnetic Fe2O3-AgBr.
Identifieur interne : 000703 ( Main/Corpus ); précédent : 000702; suivant : 000704Visible-light-driven photocatalytic inactivation of Escherichia coli by magnetic Fe2O3-AgBr.
Auteurs : Tsz Wai Ng ; Lisha Zhang ; Jianshe Liu ; Guocheng Huang ; Wei Wang ; Po Keung WongSource :
- Water research [ 1879-2448 ] ; 2016.
English descriptors
- KwdEn :
- Bromides (chemistry), Catalysis (MeSH), Disinfection (methods), Escherichia coli (growth & development), Escherichia coli (radiation effects), Ferric Compounds (chemistry), Hydrogen Peroxide (chemistry), Light (MeSH), Magnetic Phenomena (MeSH), Photochemical Processes (MeSH), Silver Compounds (chemistry), Staphylococcus aureus (growth & development), Staphylococcus aureus (radiation effects), Water Purification (methods).
- MESH :
- chemical , chemistry : Bromides, Ferric Compounds, Hydrogen Peroxide, Silver Compounds.
- growth & development : Escherichia coli, Staphylococcus aureus.
- methods : Disinfection, Water Purification.
- radiation effects : Escherichia coli, Staphylococcus aureus.
- Catalysis, Light, Magnetic Phenomena, Photochemical Processes.
Abstract
Bacterial inactivation by magnetic photocatalyst receives increasing interests for the ease recovery and reuse of photocatalysts. This study investigated bacterial inactivation by a magnetic photocatalysts, Fe2O3-AgBr, under the irradiation of a commercially available light emitting diode lamp. The effects of different factors on the inactivation of Escherichia coli were also evaluated, in term of the efficiency in inactivation. The results showed that Fe2O3-AgBr was able to inactivate both Gram negative (E. coli) and Gram positive (Staphylococcus aureus) bacteria. Bacterial inactivation by Fe2O3-AgBr was more favorable under high temperature and alkaline pH. Presence of Ca(2+) promoted the bacterial inactivation while the presence of [Formula: see text] was inhibitory. The mechanisms of photocatalytic bacterial inactivation were systemically studied and the effects of the presence of various specific reactive species scavengers and argon suggest that Fe2O3-AgBr inactivate bacterial cells by the oxidation of H2O2 generated from the photo-generated electron and direct oxidation of photo-generated hole. The detection of different reactive species further supported the proposed mechanisms. The results provide information for the evaluation of bacterial inactivation performance of Fe2O3-AgBr under different conditions. More importantly, bacterial inactivation for five consecutive cycles demonstrated Fe2O3-AgBr exhibited highly stable bactericidal activity and suggest that the magnetic Fe2O3-AgBr has great potential for water disinfection.
DOI: 10.1016/j.watres.2015.12.022
PubMed: 26724445
Links to Exploration step
pubmed:26724445Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Visible-light-driven photocatalytic inactivation of Escherichia coli by magnetic Fe2O3-AgBr.</title><author><name sortKey="Ng, Tsz Wai" sort="Ng, Tsz Wai" uniqKey="Ng T" first="Tsz Wai" last="Ng">Tsz Wai Ng</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.</nlm:affiliation></affiliation></author><author><name sortKey="Zhang, Lisha" sort="Zhang, Lisha" uniqKey="Zhang L" first="Lisha" last="Zhang">Lisha Zhang</name><affiliation><nlm:affiliation>College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: lszhang@dhu.edu.cn.</nlm:affiliation></affiliation></author><author><name sortKey="Liu, Jianshe" sort="Liu, Jianshe" uniqKey="Liu J" first="Jianshe" last="Liu">Jianshe Liu</name><affiliation><nlm:affiliation>College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.</nlm:affiliation></affiliation></author><author><name sortKey="Huang, Guocheng" sort="Huang, Guocheng" uniqKey="Huang G" first="Guocheng" last="Huang">Guocheng Huang</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.</nlm:affiliation></affiliation></author><author><name sortKey="Wang, Wei" sort="Wang, Wei" uniqKey="Wang W" first="Wei" last="Wang">Wei Wang</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China; School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.</nlm:affiliation></affiliation></author><author><name sortKey="Wong, Po Keung" sort="Wong, Po Keung" uniqKey="Wong P" first="Po Keung" last="Wong">Po Keung Wong</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China. Electronic address: pkwong@cuhk.edu.hk.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2016">2016</date><idno type="RBID">pubmed:26724445</idno><idno type="pmid">26724445</idno><idno type="doi">10.1016/j.watres.2015.12.022</idno><idno type="wicri:Area/Main/Corpus">000703</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000703</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Visible-light-driven photocatalytic inactivation of Escherichia coli by magnetic Fe2O3-AgBr.</title><author><name sortKey="Ng, Tsz Wai" sort="Ng, Tsz Wai" uniqKey="Ng T" first="Tsz Wai" last="Ng">Tsz Wai Ng</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.</nlm:affiliation></affiliation></author><author><name sortKey="Zhang, Lisha" sort="Zhang, Lisha" uniqKey="Zhang L" first="Lisha" last="Zhang">Lisha Zhang</name><affiliation><nlm:affiliation>College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: lszhang@dhu.edu.cn.</nlm:affiliation></affiliation></author><author><name sortKey="Liu, Jianshe" sort="Liu, Jianshe" uniqKey="Liu J" first="Jianshe" last="Liu">Jianshe Liu</name><affiliation><nlm:affiliation>College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.</nlm:affiliation></affiliation></author><author><name sortKey="Huang, Guocheng" sort="Huang, Guocheng" uniqKey="Huang G" first="Guocheng" last="Huang">Guocheng Huang</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.</nlm:affiliation></affiliation></author><author><name sortKey="Wang, Wei" sort="Wang, Wei" uniqKey="Wang W" first="Wei" last="Wang">Wei Wang</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China; School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.</nlm:affiliation></affiliation></author><author><name sortKey="Wong, Po Keung" sort="Wong, Po Keung" uniqKey="Wong P" first="Po Keung" last="Wong">Po Keung Wong</name><affiliation><nlm:affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China. Electronic address: pkwong@cuhk.edu.hk.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Water research</title><idno type="eISSN">1879-2448</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bromides (chemistry)</term><term>Catalysis (MeSH)</term><term>Disinfection (methods)</term><term>Escherichia coli (growth & development)</term><term>Escherichia coli (radiation effects)</term><term>Ferric Compounds (chemistry)</term><term>Hydrogen Peroxide (chemistry)</term><term>Light (MeSH)</term><term>Magnetic Phenomena (MeSH)</term><term>Photochemical Processes (MeSH)</term><term>Silver Compounds (chemistry)</term><term>Staphylococcus aureus (growth & development)</term><term>Staphylococcus aureus (radiation effects)</term><term>Water Purification (methods)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Bromides</term><term>Ferric Compounds</term><term>Hydrogen Peroxide</term><term>Silver Compounds</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Escherichia coli</term><term>Staphylococcus aureus</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Disinfection</term><term>Water Purification</term></keywords><keywords scheme="MESH" qualifier="radiation effects" xml:lang="en"><term>Escherichia coli</term><term>Staphylococcus aureus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Catalysis</term><term>Light</term><term>Magnetic Phenomena</term><term>Photochemical Processes</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Bacterial inactivation by magnetic photocatalyst receives increasing interests for the ease recovery and reuse of photocatalysts. This study investigated bacterial inactivation by a magnetic photocatalysts, Fe2O3-AgBr, under the irradiation of a commercially available light emitting diode lamp. The effects of different factors on the inactivation of Escherichia coli were also evaluated, in term of the efficiency in inactivation. The results showed that Fe2O3-AgBr was able to inactivate both Gram negative (E. coli) and Gram positive (Staphylococcus aureus) bacteria. Bacterial inactivation by Fe2O3-AgBr was more favorable under high temperature and alkaline pH. Presence of Ca(2+) promoted the bacterial inactivation while the presence of [Formula: see text] was inhibitory. The mechanisms of photocatalytic bacterial inactivation were systemically studied and the effects of the presence of various specific reactive species scavengers and argon suggest that Fe2O3-AgBr inactivate bacterial cells by the oxidation of H2O2 generated from the photo-generated electron and direct oxidation of photo-generated hole. The detection of different reactive species further supported the proposed mechanisms. The results provide information for the evaluation of bacterial inactivation performance of Fe2O3-AgBr under different conditions. More importantly, bacterial inactivation for five consecutive cycles demonstrated Fe2O3-AgBr exhibited highly stable bactericidal activity and suggest that the magnetic Fe2O3-AgBr has great potential for water disinfection. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">26724445</PMID><DateCompleted><Year>2016</Year><Month>10</Month><Day>20</Day></DateCompleted><DateRevised><Year>2018</Year><Month>03</Month><Day>04</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1879-2448</ISSN><JournalIssue CitedMedium="Internet"><Volume>90</Volume><PubDate><Year>2016</Year><Month>Mar</Month><Day>01</Day></PubDate></JournalIssue><Title>Water research</Title><ISOAbbreviation>Water Res</ISOAbbreviation></Journal><ArticleTitle>Visible-light-driven photocatalytic inactivation of Escherichia coli by magnetic Fe2O3-AgBr.</ArticleTitle><Pagination><MedlinePgn>111-118</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0043-1354(15)30419-X</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.watres.2015.12.022</ELocationID><Abstract><AbstractText>Bacterial inactivation by magnetic photocatalyst receives increasing interests for the ease recovery and reuse of photocatalysts. This study investigated bacterial inactivation by a magnetic photocatalysts, Fe2O3-AgBr, under the irradiation of a commercially available light emitting diode lamp. The effects of different factors on the inactivation of Escherichia coli were also evaluated, in term of the efficiency in inactivation. The results showed that Fe2O3-AgBr was able to inactivate both Gram negative (E. coli) and Gram positive (Staphylococcus aureus) bacteria. Bacterial inactivation by Fe2O3-AgBr was more favorable under high temperature and alkaline pH. Presence of Ca(2+) promoted the bacterial inactivation while the presence of [Formula: see text] was inhibitory. The mechanisms of photocatalytic bacterial inactivation were systemically studied and the effects of the presence of various specific reactive species scavengers and argon suggest that Fe2O3-AgBr inactivate bacterial cells by the oxidation of H2O2 generated from the photo-generated electron and direct oxidation of photo-generated hole. The detection of different reactive species further supported the proposed mechanisms. The results provide information for the evaluation of bacterial inactivation performance of Fe2O3-AgBr under different conditions. More importantly, bacterial inactivation for five consecutive cycles demonstrated Fe2O3-AgBr exhibited highly stable bactericidal activity and suggest that the magnetic Fe2O3-AgBr has great potential for water disinfection. </AbstractText><CopyrightInformation>Copyright © 2015 Elsevier Ltd. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Ng</LastName><ForeName>Tsz Wai</ForeName><Initials>TW</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zhang</LastName><ForeName>Lisha</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: lszhang@dhu.edu.cn.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Liu</LastName><ForeName>Jianshe</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Huang</LastName><ForeName>Guocheng</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wang</LastName><ForeName>Wei</ForeName><Initials>W</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China; School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wong</LastName><ForeName>Po Keung</ForeName><Initials>PK</Initials><AffiliationInfo><Affiliation>School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China. Electronic address: pkwong@cuhk.edu.hk.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2015</Year><Month>12</Month><Day>15</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Water Res</MedlineTA><NlmUniqueID>0105072</NlmUniqueID><ISSNLinking>0043-1354</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D001965">Bromides</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D005290">Ferric Compounds</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D018030">Silver Compounds</NameOfSubstance></Chemical><Chemical><RegistryNumber>1K09F3G675</RegistryNumber><NameOfSubstance UI="C000499">ferric oxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>BBX060AN9V</RegistryNumber><NameOfSubstance UI="D006861">Hydrogen Peroxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>NHQ37BJZ2Z</RegistryNumber><NameOfSubstance UI="C047751">silver bromide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001965" MajorTopicYN="N">Bromides</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002384" MajorTopicYN="N">Catalysis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004203" MajorTopicYN="N">Disinfection</DescriptorName><QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D004926" MajorTopicYN="N">Escherichia coli</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000528" MajorTopicYN="Y">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005290" MajorTopicYN="N">Ferric Compounds</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006861" MajorTopicYN="N">Hydrogen Peroxide</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008027" MajorTopicYN="N">Light</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D060328" MajorTopicYN="N">Magnetic Phenomena</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D055668" MajorTopicYN="N">Photochemical Processes</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018030" MajorTopicYN="N">Silver Compounds</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013211" MajorTopicYN="N">Staphylococcus aureus</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018508" MajorTopicYN="N">Water Purification</DescriptorName><QualifierName UI="Q000379" MajorTopicYN="N">methods</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Bacterial inactivation</Keyword><Keyword MajorTopicYN="N">Inactivation mechanisms</Keyword><Keyword MajorTopicYN="N">Magnetic photocatalyst</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2015</Year><Month>08</Month><Day>24</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2015</Year><Month>12</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2015</Year><Month>12</Month><Day>12</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2016</Year><Month>1</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2016</Year><Month>1</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2016</Year><Month>10</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">26724445</ArticleId><ArticleId IdType="pii">S0043-1354(15)30419-X</ArticleId><ArticleId IdType="doi">10.1016/j.watres.2015.12.022</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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