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Journal of Applied Electrochemistry

, Volume 41, Issue 5, pp 577–587 | Cite as

Anodic oxidation of organic pollutants on a Ti/SnO2–Sb2O4 anode

  • L. CiríacoEmail author
  • D. Santos
  • M. J. Pacheco
  • A. Lopes
Original Paper

Abstract

A Ti/SnO2–Sb2O4 electrode was prepared by alternate Sn and Sb electrodepositions using the thermo-electrochemical method. The chemical, electrochemical, and structural characterization of the electrode was performed and it was tested in the anodic oxidation of several pollutants, phenol, ibuprofen, acid orange 7 (AO7), and diclofenac, all in aqueous 0.035 M Na2SO4 solutions at current densities of 10 and 20 mA cm−2. After the 24 h assay, removal of chemical oxygen demand, total organic carbon (TOC) and absorbance were very high, especially at the higher current density. TOC removals presented the lowest value. However, after 24 h at 20 mA cm−2, TOC removals were: phenol—94%; ibuprofen—83%; AO7—88%; and diclofenac—73%. Combustion efficiency and instantaneous and mineralization current efficiencies were also determined.

Keywords

Ti/SnO2–Sb2O4 anode Anodic oxidation Phenol AO7 Ibuprofen Diclofenac 

Notes

Acknowledgments

The financial support of Fundação para a Ciência e a Tecnologia, FCT, BII 2/UMTP/UBI/2008, PTDC/CTM/64856/2006, is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • L. Ciríaco
    • 1
    Email author
  • D. Santos
    • 1
  • M. J. Pacheco
    • 1
  • A. Lopes
    • 1
  1. 1.UMTP and Department of ChemistryUniversity of Beira InteriorCovilhãPortugal

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