Bactericidal activity of a Ce-promoted Ag/AlPO4 catalyst using molecular oxygen in water.
Identifieur interne : 000B71 ( Main/Corpus ); précédent : 000B70; suivant : 000B72Bactericidal activity of a Ce-promoted Ag/AlPO4 catalyst using molecular oxygen in water.
Auteurs : Qingyun Chang ; Hong He ; Jincai Zhao ; Min Yang ; Jiuhui QutSource :
- Environmental science & technology [ 0013-936X ] ; 2008.
English descriptors
- KwdEn :
- Aluminum Compounds (chemistry), Aluminum Compounds (pharmacology), Cerium (chemistry), Disinfectants (chemistry), Electron Spin Resonance Spectroscopy (MeSH), Escherichia coli (drug effects), Escherichia coli (ultrastructure), Microscopy, Electron, Transmission (MeSH), Oxygen (chemistry), Phosphates (chemistry), Phosphates (pharmacology), Reactive Oxygen Species (chemistry), Silver (chemistry), Silver (pharmacology), Water (chemistry), Water Microbiology (MeSH), X-Ray Diffraction (MeSH).
- MESH :
- chemical , chemistry : Aluminum Compounds, Cerium, Disinfectants, Oxygen, Phosphates, Reactive Oxygen Species, Silver, Water.
- chemical , pharmacology : Aluminum Compounds, Phosphates, Silver.
- drug effects : Escherichia coli.
- ultrastructure : Escherichia coli.
- Electron Spin Resonance Spectroscopy, Microscopy, Electron, Transmission, Water Microbiology, X-Ray Diffraction.
Abstract
The catalytic inactivation of Escherichia coli in water by a cerium (Ce)-promoted silver-loaded aluminum phosphate (Ag/ AlPO4) catalyst using molecular oxygen was investigated. With optimum Ce content, the Ag(Ce)/AlPO4 catalyst exhibited strong bactericidal activity. The process of decomposition of the cell wall and cell membrane was directly observed by TEM. The different morphological changes of E. coli cells treated with the Ag(Ce)/AlPO4 catalyst and those treated with Ag+ suggested that the Ag+ eluted from the catalyst surface did not play an important role during the bactericidal process. Results of DMPO spin-trapping measurements by electron spin resonance (ESR) indicated the formation of the reactive oxygen species (ROS) *OH and *O2-, which caused the considerable bactericidal activity. The formation of H2O2 acted as an important intermediate; this was confirmed by addition of catalase as the scavenger. A possible catalytic oxidation bactericidal mechanism using molecular oxygen was proposed for the Ag(Ce)/AlPO4 catalyst.
DOI: 10.1021/es071810e
PubMed: 18441823
Links to Exploration step
pubmed:18441823Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Bactericidal activity of a Ce-promoted Ag/AlPO4 catalyst using molecular oxygen in water.</title><author><name sortKey="Chang, Qingyun" sort="Chang, Qingyun" uniqKey="Chang Q" first="Qingyun" last="Chang">Qingyun Chang</name><affiliation><nlm:affiliation>Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100080, China.</nlm:affiliation></affiliation></author><author><name sortKey="He, Hong" sort="He, Hong" uniqKey="He H" first="Hong" last="He">Hong He</name></author><author><name sortKey="Zhao, Jincai" sort="Zhao, Jincai" uniqKey="Zhao J" first="Jincai" last="Zhao">Jincai Zhao</name></author><author><name sortKey="Yang, Min" sort="Yang, Min" uniqKey="Yang M" first="Min" last="Yang">Min Yang</name></author><author><name sortKey="Qut, Jiuhui" sort="Qut, Jiuhui" uniqKey="Qut J" first="Jiuhui" last="Qut">Jiuhui Qut</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2008">2008</date><idno type="RBID">pubmed:18441823</idno><idno type="pmid">18441823</idno><idno type="doi">10.1021/es071810e</idno><idno type="wicri:Area/Main/Corpus">000B71</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000B71</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Bactericidal activity of a Ce-promoted Ag/AlPO4 catalyst using molecular oxygen in water.</title><author><name sortKey="Chang, Qingyun" sort="Chang, Qingyun" uniqKey="Chang Q" first="Qingyun" last="Chang">Qingyun Chang</name><affiliation><nlm:affiliation>Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100080, China.</nlm:affiliation></affiliation></author><author><name sortKey="He, Hong" sort="He, Hong" uniqKey="He H" first="Hong" last="He">Hong He</name></author><author><name sortKey="Zhao, Jincai" sort="Zhao, Jincai" uniqKey="Zhao J" first="Jincai" last="Zhao">Jincai Zhao</name></author><author><name sortKey="Yang, Min" sort="Yang, Min" uniqKey="Yang M" first="Min" last="Yang">Min Yang</name></author><author><name sortKey="Qut, Jiuhui" sort="Qut, Jiuhui" uniqKey="Qut J" first="Jiuhui" last="Qut">Jiuhui Qut</name></author></analytic><series><title level="j">Environmental science & technology</title><idno type="ISSN">0013-936X</idno><imprint><date when="2008" type="published">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminum Compounds (chemistry)</term><term>Aluminum Compounds (pharmacology)</term><term>Cerium (chemistry)</term><term>Disinfectants (chemistry)</term><term>Electron Spin Resonance Spectroscopy (MeSH)</term><term>Escherichia coli (drug effects)</term><term>Escherichia coli (ultrastructure)</term><term>Microscopy, Electron, Transmission (MeSH)</term><term>Oxygen (chemistry)</term><term>Phosphates (chemistry)</term><term>Phosphates (pharmacology)</term><term>Reactive Oxygen Species (chemistry)</term><term>Silver (chemistry)</term><term>Silver (pharmacology)</term><term>Water (chemistry)</term><term>Water Microbiology (MeSH)</term><term>X-Ray Diffraction (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Aluminum Compounds</term><term>Cerium</term><term>Disinfectants</term><term>Oxygen</term><term>Phosphates</term><term>Reactive Oxygen Species</term><term>Silver</term><term>Water</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Aluminum Compounds</term><term>Phosphates</term><term>Silver</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Escherichia coli</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="en"><term>Escherichia coli</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Electron Spin Resonance Spectroscopy</term><term>Microscopy, Electron, Transmission</term><term>Water Microbiology</term><term>X-Ray Diffraction</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The catalytic inactivation of Escherichia coli in water by a cerium (Ce)-promoted silver-loaded aluminum phosphate (Ag/ AlPO4) catalyst using molecular oxygen was investigated. With optimum Ce content, the Ag(Ce)/AlPO4 catalyst exhibited strong bactericidal activity. The process of decomposition of the cell wall and cell membrane was directly observed by TEM. The different morphological changes of E. coli cells treated with the Ag(Ce)/AlPO4 catalyst and those treated with Ag+ suggested that the Ag+ eluted from the catalyst surface did not play an important role during the bactericidal process. Results of DMPO spin-trapping measurements by electron spin resonance (ESR) indicated the formation of the reactive oxygen species (ROS) *OH and *O2-, which caused the considerable bactericidal activity. The formation of H2O2 acted as an important intermediate; this was confirmed by addition of catalase as the scavenger. A possible catalytic oxidation bactericidal mechanism using molecular oxygen was proposed for the Ag(Ce)/AlPO4 catalyst.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">18441823</PMID><DateCompleted><Year>2008</Year><Month>07</Month><Day>31</Day></DateCompleted><DateRevised><Year>2019</Year><Month>07</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0013-936X</ISSN><JournalIssue CitedMedium="Print"><Volume>42</Volume><Issue>5</Issue><PubDate><Year>2008</Year><Month>Mar</Month><Day>01</Day></PubDate></JournalIssue><Title>Environmental science & technology</Title><ISOAbbreviation>Environ Sci Technol</ISOAbbreviation></Journal><ArticleTitle>Bactericidal activity of a Ce-promoted Ag/AlPO4 catalyst using molecular oxygen in water.</ArticleTitle><Pagination><MedlinePgn>1699-704</MedlinePgn></Pagination><Abstract><AbstractText>The catalytic inactivation of Escherichia coli in water by a cerium (Ce)-promoted silver-loaded aluminum phosphate (Ag/ AlPO4) catalyst using molecular oxygen was investigated. With optimum Ce content, the Ag(Ce)/AlPO4 catalyst exhibited strong bactericidal activity. The process of decomposition of the cell wall and cell membrane was directly observed by TEM. The different morphological changes of E. coli cells treated with the Ag(Ce)/AlPO4 catalyst and those treated with Ag+ suggested that the Ag+ eluted from the catalyst surface did not play an important role during the bactericidal process. Results of DMPO spin-trapping measurements by electron spin resonance (ESR) indicated the formation of the reactive oxygen species (ROS) *OH and *O2-, which caused the considerable bactericidal activity. The formation of H2O2 acted as an important intermediate; this was confirmed by addition of catalase as the scavenger. A possible catalytic oxidation bactericidal mechanism using molecular oxygen was proposed for the Ag(Ce)/AlPO4 catalyst.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Chang</LastName><ForeName>Qingyun</ForeName><Initials>Q</Initials><AffiliationInfo><Affiliation>Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100080, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>He</LastName><ForeName>Hong</ForeName><Initials>H</Initials></Author><Author ValidYN="Y"><LastName>Zhao</LastName><ForeName>Jincai</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Yang</LastName><ForeName>Min</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Qut</LastName><ForeName>Jiuhui</ForeName><Initials>J</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType 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MajorTopicYN="N">Disinfectants</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D004578" MajorTopicYN="N">Electron Spin Resonance Spectroscopy</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004926" MajorTopicYN="N">Escherichia coli</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000648" MajorTopicYN="N">ultrastructure</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D046529" MajorTopicYN="N">Microscopy, Electron, Transmission</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010100" MajorTopicYN="N">Oxygen</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010710" MajorTopicYN="N">Phosphates</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017382" MajorTopicYN="N">Reactive Oxygen Species</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012834" MajorTopicYN="N">Silver</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014871" MajorTopicYN="N">Water Microbiology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014961" MajorTopicYN="N">X-Ray Diffraction</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate 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