Petrophilic, Fe(III) Reducing Exoelectrogen Citrobacter sp. KVM11, Isolated From Hydrocarbon Fed Microbial Electrochemical Remediation Systems
Identifieur interne : 000C79 ( Pmc/Curation ); précédent : 000C78; suivant : 000C80Petrophilic, Fe(III) Reducing Exoelectrogen Citrobacter sp. KVM11, Isolated From Hydrocarbon Fed Microbial Electrochemical Remediation Systems
Auteurs : Krishnaveni Venkidusamy [Australie] ; Ananda Rao Hari [Qatar] ; Mallavarapu Megharaj [Australie]Source :
- Frontiers in Microbiology [ 1664-302X ] ; 2018.
Abstract
Exoelectrogenic biofilms capable of extracellular electron transfer are important in advanced technologies such as those used in microbial electrochemical remediation systems (MERS) Few bacterial strains have been, nevertheless, obtained from MERS exoelectrogenic biofilms and characterized for bioremediation potential. Here we report the identification of one such bacterial strain,
Url:
DOI: 10.3389/fmicb.2018.00349
PubMed: 29593662
PubMed Central: 5858583
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Petrophilic, Fe(III) Reducing Exoelectrogen <italic>Citrobacter</italic> sp. KVM11, Isolated From Hydrocarbon Fed Microbial Electrochemical Remediation Systems</title><author><name sortKey="Venkidusamy, Krishnaveni" sort="Venkidusamy, Krishnaveni" uniqKey="Venkidusamy K" first="Krishnaveni" last="Venkidusamy">Krishnaveni Venkidusamy</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>CRC for Contamination Assessment and Remediation of the Environment (CRCCARE)</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Hari, Ananda Rao" sort="Hari, Ananda Rao" uniqKey="Hari A" first="Ananda Rao" last="Hari">Ananda Rao Hari</name><affiliation wicri:level="1"><nlm:aff id="aff3"><institution>Division of Sustainable Development, Hamad Bin Khalifa University</institution>,<addr-line>Education City, Doha</addr-line>,<country>Qatar</country></nlm:aff><country xml:lang="fr">Qatar</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>CRC for Contamination Assessment and Remediation of the Environment (CRCCARE)</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff4"><institution>Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle</institution>,<addr-line>Callaghan, NSW</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">29593662</idno><idno type="pmc">5858583</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5858583</idno><idno type="RBID">PMC:5858583</idno><idno type="doi">10.3389/fmicb.2018.00349</idno><date when="2018">2018</date><idno type="wicri:Area/Pmc/Corpus">000C79</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000C79</idno><idno type="wicri:Area/Pmc/Curation">000C79</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000C79</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Petrophilic, Fe(III) Reducing Exoelectrogen <italic>Citrobacter</italic> sp. KVM11, Isolated From Hydrocarbon Fed Microbial Electrochemical Remediation Systems</title><author><name sortKey="Venkidusamy, Krishnaveni" sort="Venkidusamy, Krishnaveni" uniqKey="Venkidusamy K" first="Krishnaveni" last="Venkidusamy">Krishnaveni Venkidusamy</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>CRC for Contamination Assessment and Remediation of the Environment (CRCCARE)</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Hari, Ananda Rao" sort="Hari, Ananda Rao" uniqKey="Hari A" first="Ananda Rao" last="Hari">Ananda Rao Hari</name><affiliation wicri:level="1"><nlm:aff id="aff3"><institution>Division of Sustainable Development, Hamad Bin Khalifa University</institution>,<addr-line>Education City, Doha</addr-line>,<country>Qatar</country></nlm:aff><country xml:lang="fr">Qatar</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Megharaj, Mallavarapu" sort="Megharaj, Mallavarapu" uniqKey="Megharaj M" first="Mallavarapu" last="Megharaj">Mallavarapu Megharaj</name><affiliation wicri:level="1"><nlm:aff id="aff1"><institution>Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><institution>CRC for Contamination Assessment and Remediation of the Environment (CRCCARE)</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:aff id="aff4"><institution>Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle</institution>,<addr-line>Callaghan, NSW</addr-line>,<country>Australia</country></nlm:aff><country xml:lang="fr">Australie</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Frontiers in Microbiology</title><idno type="eISSN">1664-302X</idno><imprint><date when="2018">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Exoelectrogenic biofilms capable of extracellular electron transfer are important in advanced technologies such as those used in microbial electrochemical remediation systems (MERS) Few bacterial strains have been, nevertheless, obtained from MERS exoelectrogenic biofilms and characterized for bioremediation potential. Here we report the identification of one such bacterial strain, <italic>Citrobacter</italic> sp. KVM11, a petrophilic, iron reducing bacterial strain isolated from hydrocarbon fed MERS, producing anodic currents in microbial electrochemical systems. Fe(III) reduction of 90.01 ± 0.43% was observed during 5 weeks of incubation with Fe(III) supplemented liquid cultures. Biodegradation screening assays showed that the hydrocarbon degradation had been carried out by metabolically active cells accompanied by growth. The characteristic feature of diazo dye decolorization was used as a simple criterion for evaluating the electrochemical activity in the candidate microbe. The electrochemical activities of the strain KVM11 were characterized in a single chamber fuel cell and three electrode electrochemical cells. The inoculation of strain KVM11 amended with acetate and citrate as the sole carbon and energy sources has resulted in an increase in anodic currents (maximum current density) of 212 ± 3 and 359 ± mA/m<sup>2</sup> with respective coulombic efficiencies of 19.5 and 34.9% in a single chamber fuel cells. Cyclic voltammetry studies showed that anaerobically grown cells of strain KVM11 are electrochemically active whereas aerobically grown cells lacked the electrochemical activity. Electrobioremediation potential of the strain KVM11 was investigated in hydrocarbonoclastic and dye detoxification conditions using MERS. About 89.60% of 400 mg l<sup>-1</sup> azo dye was removed during the first 24 h of operation and it reached below detection limits by the end of the batch operation (60 h). Current generation and biodegradation capabilities of strain KVM11 were examined using an initial concentration of 800 mg l<sup>-1</sup> of diesel range hydrocarbons (C9-C36) in MERS (maximum currentdensity 50.64 ± 7 mA/m<sup>2</sup>; power density 4.08 ± 2 mW/m<sup>2</sup>, 1000 ω, hydrocarbon removal 60.14 ± 0.7%). Such observations reveal the potential of electroactive biofilms in the simultaneous remediation of hydrocarbon contaminated environments with generation of energy.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Aldisi, Z" uniqKey="Aldisi Z">Z. AlDisi</name></author><author><name sortKey="Jaoua, S" uniqKey="Jaoua S">S. Jaoua</name></author><author><name sortKey="Al Thani, D" uniqKey="Al Thani D">D. Al-Thani</name></author><author><name sortKey="Almeer, S" uniqKey="Almeer S">S. AlMeer</name></author><author><name sortKey="Zouari, N" uniqKey="Zouari N">N. 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Logan</name></author></analytic></biblStruct></listBibl></div1></back></TEI><pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Front Microbiol</journal-id><journal-id journal-id-type="iso-abbrev">Front Microbiol</journal-id><journal-id journal-id-type="publisher-id">Front. Microbiol.</journal-id><journal-title-group><journal-title>Frontiers in Microbiology</journal-title></journal-title-group><issn pub-type="epub">1664-302X</issn><publisher><publisher-name>Frontiers Media S.A.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">29593662</article-id><article-id pub-id-type="pmc">5858583</article-id><article-id pub-id-type="doi">10.3389/fmicb.2018.00349</article-id><article-categories><subj-group subj-group-type="heading"><subject>Microbiology</subject><subj-group><subject>Original Research</subject></subj-group></subj-group></article-categories><title-group><article-title>Petrophilic, Fe(III) Reducing Exoelectrogen <italic>Citrobacter</italic> sp. KVM11, Isolated From Hydrocarbon Fed Microbial Electrochemical Remediation Systems</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Venkidusamy</surname><given-names>Krishnaveni</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="author-notes" rid="fn001"><sup>*</sup></xref><uri xlink:type="simple" xlink:href="http://loop.frontiersin.org/people/343127/overview"></uri></contrib><contrib contrib-type="author"><name><surname>Hari</surname><given-names>Ananda Rao</given-names></name><xref ref-type="aff" rid="aff3"><sup>3</sup></xref><uri xlink:type="simple" xlink:href="http://loop.frontiersin.org/people/343679/overview"></uri></contrib><contrib contrib-type="author"><name><surname>Megharaj</surname><given-names>Mallavarapu</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="aff" rid="aff2"><sup>2</sup></xref><xref ref-type="aff" rid="aff4"><sup>4</sup></xref><uri xlink:type="simple" xlink:href="http://loop.frontiersin.org/people/36475/overview"></uri></contrib></contrib-group><aff id="aff1"><sup>1</sup><institution>Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></aff><aff id="aff2"><sup>2</sup><institution>CRC for Contamination Assessment and Remediation of the Environment (CRCCARE)</institution>,<addr-line>Mawson Lakes, SA</addr-line>,<country>Australia</country></aff><aff id="aff3"><sup>3</sup><institution>Division of Sustainable Development, Hamad Bin Khalifa University</institution>,<addr-line>Education City, Doha</addr-line>,<country>Qatar</country></aff><aff id="aff4"><sup>4</sup><institution>Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle</institution>,<addr-line>Callaghan, NSW</addr-line>,<country>Australia</country></aff><author-notes><fn fn-type="edited-by"><p>Edited by: <italic>Yong Xiao, Institute of Urban Environment (CAS), China</italic></p></fn><fn fn-type="edited-by"><p>Reviewed by: <italic>Baogang Zhang, China University of Geosciences, China; Gefu Zhu, Institute of Urban Environment (CAS), China</italic></p></fn><corresp id="fn001">*Correspondence: <italic>Krishnaveni Venkidusamy, <email xlink:type="simple">krishnaveni.venkidusamy@mymail.unisa.edu.au</email></italic></corresp><fn fn-type="other" id="fn002"><p>This article was submitted to Microbiotechnology, Ecotoxicology and Bioremediation, a section of the journal Frontiers in Microbiology</p></fn></author-notes><pub-date pub-type="epub"><day>12</day><month>3</month><year>2018</year></pub-date><pub-date pub-type="collection"><year>2018</year></pub-date><volume>9</volume><elocation-id>349</elocation-id><history><date date-type="received"><day>21</day><month>2</month><year>2017</year></date><date date-type="accepted"><day>14</day><month>2</month><year>2018</year></date></history><permissions><copyright-statement>Copyright © 2018 Venkidusamy, Hari and Megharaj.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder>Venkidusamy, Hari and Megharaj</copyright-holder><license xlink:href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</license-p></license></permissions><abstract><p>Exoelectrogenic biofilms capable of extracellular electron transfer are important in advanced technologies such as those used in microbial electrochemical remediation systems (MERS) Few bacterial strains have been, nevertheless, obtained from MERS exoelectrogenic biofilms and characterized for bioremediation potential. Here we report the identification of one such bacterial strain, <italic>Citrobacter</italic> sp. KVM11, a petrophilic, iron reducing bacterial strain isolated from hydrocarbon fed MERS, producing anodic currents in microbial electrochemical systems. Fe(III) reduction of 90.01 ± 0.43% was observed during 5 weeks of incubation with Fe(III) supplemented liquid cultures. Biodegradation screening assays showed that the hydrocarbon degradation had been carried out by metabolically active cells accompanied by growth. The characteristic feature of diazo dye decolorization was used as a simple criterion for evaluating the electrochemical activity in the candidate microbe. The electrochemical activities of the strain KVM11 were characterized in a single chamber fuel cell and three electrode electrochemical cells. The inoculation of strain KVM11 amended with acetate and citrate as the sole carbon and energy sources has resulted in an increase in anodic currents (maximum current density) of 212 ± 3 and 359 ± mA/m<sup>2</sup> with respective coulombic efficiencies of 19.5 and 34.9% in a single chamber fuel cells. Cyclic voltammetry studies showed that anaerobically grown cells of strain KVM11 are electrochemically active whereas aerobically grown cells lacked the electrochemical activity. Electrobioremediation potential of the strain KVM11 was investigated in hydrocarbonoclastic and dye detoxification conditions using MERS. About 89.60% of 400 mg l<sup>-1</sup> azo dye was removed during the first 24 h of operation and it reached below detection limits by the end of the batch operation (60 h). Current generation and biodegradation capabilities of strain KVM11 were examined using an initial concentration of 800 mg l<sup>-1</sup> of diesel range hydrocarbons (C9-C36) in MERS (maximum currentdensity 50.64 ± 7 mA/m<sup>2</sup>; power density 4.08 ± 2 mW/m<sup>2</sup>, 1000 ω, hydrocarbon removal 60.14 ± 0.7%). Such observations reveal the potential of electroactive biofilms in the simultaneous remediation of hydrocarbon contaminated environments with generation of energy.</p></abstract><kwd-group><kwd>petrophilic</kwd><kwd>electroactive biofilms</kwd><kwd><italic>Citrobacter</italic> sp. KVM11</kwd><kwd>iron reducing</kwd><kwd>extracellular electron flow</kwd><kwd>microbial electrochemical remediation systems</kwd><kwd>hydrocarbonoclastic potential</kwd></kwd-group><counts><fig-count count="11"></fig-count><table-count count="1"></table-count><equation-count count="0"></equation-count><ref-count count="87"></ref-count><page-count count="14"></page-count><word-count count="0"></word-count></counts></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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