ELECTROCHEMICAL STUDIES OF THE OXIDATION OF PERSISTENT ORGANIC POLLUTANT 4-CHLOROPHENOL

Authors

  • V. Gilles
  • T. F. Soares
  • A. R. De Andrade
  • J. Ribeiro

DOI:

https://doi.org/10.18011/bioeng2014v8n1p43-58

Keywords:

4-Chorophenol, DSA®, Electrochemical Impedance

Abstract

This paper aimed to prepare and characterize type electrodes dimensionally stable anodes, DSA® for degradation of organic compounds. The electrodes were prepared by thermal decomposition of polymeric precursor at 450° C with the following nominal compositions: Ti/Pt(30%) RuO2(10%)SnO2(60%), Ti/Pt(30%)RuO2(30%)SnO2(40%), and Ti/Pt(30%)RuO2(35%)SnO2(35%). The analysis by X-ray diffraction showed the presence of Pt on the metallic form with a face-centered cubic structure. Oxides of ruthenium and tin showed tetragonal structure and solid solutions formation at concentrations of ≥ 30% RuO2. The micrographs showed mud-cracked morphology for the electrodes with a high % atom of ruthenium. The analyzes carried out by cyclic voltammetry in an acid medium in the presence of 4-chlorophenol, 4-CF, showed the appearance of an anodic peak near 1.0 V vs. Ag/AgCl (KCl, 3.0 mol/L) being proportional to 4-CF concentration. Electrolysis test showed that the electrodes Ti/Pt(30%)RuO2(30%)SnO2(40%), and Ti/Pt(30%)RuO2(35%)SnO2(35%) are considerably more efficient. The results obtained showed that the electrochemical impedance electrode Ti/Pt(30%)RuO2 (35%)SnO2(35%) has a lower charge transfer resistance

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References

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Published

2014-12-09

How to Cite

GILLES, V.; SOARES, T. . F.; ANDRADE, A. R. . D.; RIBEIRO, J. ELECTROCHEMICAL STUDIES OF THE OXIDATION OF PERSISTENT ORGANIC POLLUTANT 4-CHLOROPHENOL. Revista Brasileira de Engenharia de Biossistemas, Tupã, São Paulo, Brazil, v. 8, n. 1, p. 43–58, 2014. DOI: 10.18011/bioeng2014v8n1p43-58. Disponível em: https://seer.tupa.unesp.br/index.php/BIOENG/article/view/177. Acesso em: 1 dec. 2021.

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