Table of Contents
ISRN Environmental Chemistry
Volume 2013, Article ID 354848, 7 pages
Research Article

Electrochemical Oxidation of Ethinylestradiol on a Commercial Ti/Ru0.3 Ti0.7O2 DSA Electrode

1Department of Exact and Applied Sciences, Federal University of Ouro Preto, Loanda, 35931-008 João Monlevade, MG, Brazil
2Department of Chemistry, Federal University of Minas Gerais, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
3Institute of Chemistry of São Carlos, University of São Paulo, P.O. Box 780, 13560-970 São Carlos, SP, Brazil

Received 29 April 2013; Accepted 13 June 2013

Academic Editors: J. J. Lenhart, F. Long, and K. L. Smalling

Copyright © 2013 Karla M. Vieira et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The electrochemical oxidation of the hormone ethinylestradiol in an aqueous-methanolic medium by the application of a constant current of 40 mA cm−2 in a flow cell with a commercial Ti/Ru0.3 Ti0.7O2 electrode was evaluated. The effect caused by the use of NaCl as a support electrolyte was also investigated. Hence, HPLC-UV analyses revealed that ethinylestradiol was almost totally consumed after a 60 min reaction time in the presence of NaCl. Conversely, much lower degradation rates were obtained when NaCl was not employed. Moreover, direct infusion ESI-MS and GC-MS analysis revealed that apparently no degradation products had been formed under these conditions. Hence, this study clearly demonstrated that such electrochemical treatment can be efficiently used to promote the complete degradation (and probably mineralization) of the hormone ethinylestradiol.