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Electrochemical oxidation of diclofenac on CNT and M/CNT modified electrodes

Ferreira, M.; Guney, S.; Kuzniarska-Biernacka, I.; Soares, O. S. G. P.; Figueiredo, J. L.; Pereira, M. F. R.; Neves, I. C.; Fonseca, A. M.; Parpot, P.


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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/232682</identifier>
  <creators>
    <creator>
      <creatorName>Ferreira, M.</creatorName>
      <givenName>M.</givenName>
      <familyName>Ferreira</familyName>
      <affiliation>Univ Minho, Escola Ciencias, Ctr Quim, CQUM, Campus Gualtar, P-4710057 Braga, Portugal</affiliation>
    </creator>
    <creator>
      <creatorName>Guney, S.</creatorName>
      <givenName>S.</givenName>
      <familyName>Guney</familyName>
      <affiliation>Tech Univ Istanbul, Dept Chem, TR-34467 Sariyer, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Kuzniarska-Biernacka, I.</creatorName>
      <givenName>I.</givenName>
      <familyName>Kuzniarska-Biernacka</familyName>
    </creator>
    <creator>
      <creatorName>Soares, O. S. G. P.</creatorName>
      <givenName>O. S. G. P.</givenName>
      <familyName>Soares</familyName>
      <affiliation>Univ Porto, Lab Catalise Mat LCM, Lab Associado LSRE LCM, Dept Engn Quim,Fac Engn, Rua Dr Roberto Frias, P-4200465 Porto, Portugal</affiliation>
    </creator>
    <creator>
      <creatorName>Figueiredo, J. L.</creatorName>
      <givenName>J. L.</givenName>
      <familyName>Figueiredo</familyName>
      <affiliation>Univ Porto, Lab Catalise Mat LCM, Lab Associado LSRE LCM, Dept Engn Quim,Fac Engn, Rua Dr Roberto Frias, P-4200465 Porto, Portugal</affiliation>
    </creator>
    <creator>
      <creatorName>Pereira, M. F. R.</creatorName>
      <givenName>M. F. R.</givenName>
      <familyName>Pereira</familyName>
      <affiliation>Univ Porto, Lab Catalise Mat LCM, Lab Associado LSRE LCM, Dept Engn Quim,Fac Engn, Rua Dr Roberto Frias, P-4200465 Porto, Portugal</affiliation>
    </creator>
    <creator>
      <creatorName>Neves, I. C.</creatorName>
      <givenName>I. C.</givenName>
      <familyName>Neves</familyName>
    </creator>
    <creator>
      <creatorName>Fonseca, A. M.</creatorName>
      <givenName>A. M.</givenName>
      <familyName>Fonseca</familyName>
    </creator>
    <creator>
      <creatorName>Parpot, P.</creatorName>
      <givenName>P.</givenName>
      <familyName>Parpot</familyName>
    </creator>
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  <titles>
    <title>Electrochemical Oxidation Of Diclofenac On Cnt And M/Cnt Modified Electrodes</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2021</publicationYear>
  <dates>
    <date dateType="Issued">2021-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/232682</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1039/d1nj01117k</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">The electrochemical oxidation of diclofenac (DCF), a non-steroidal anti-inflammatory drug considered as an emerging pollutant (frequently detected in wastewater), was investigated on CNT, Pt/CNT and Ru/CNT modified electrodes based on Carbon Toray in aqueous media. The electroreactivity of DCF on these modified electrodes was studied using cyclic voltammetry and the kinetic parameters were calculated from the scan rate study. Cyclic voltammograms show several oxidation processes, which confirm the interaction between DCF and the catalyst surface necessary for direct oxidation processes. Constant potential electrolysis of DCF was carried out on carbon nanotubes (CNT) and metal supported CNT (M/CNT) modified electrodes, in 0.1 M NaOH and 0.1 M Na2CO3/NaHCO3 buffer media. The highest DCF conversion (88% after 8 h of electrolysis) was found in carbonate buffer medium, for Ru/CNT, while the best carbon mineralization efficiency (corresponding to 48% of the oxidized DCF) was obtained on Pt/CNT modified electrode in 0.1 M NaOH medium. The products of the electrolyses were identified and quantified by HPLC-MS, GC-MS, HPLC-UV-RID and IC. The results show the presence of some low molecular weight carboxylic acids, confirming the cleavage of the aromatic rings during the oxidation process.</description>
  </descriptions>
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