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International Journal of Photoenergy
Volume 7, Issue 4, Pages 187-191

The role of pH in aqueous photocatalytic oxidation of β-estradiol

Department of Chemical Technology, Lappeenranta University of Technology, P.O. Box 20, Lappeenranta 53851, Finland

Copyright © 2005 Hindawi Publishing Corporation. 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.


Experimental studies of aqueous photocatalytic oxidation (PCO) of β-estradiol in TiO2 suspensions were undertaken. The dependence of PCO efficiency and adsorption of β-estradiol on pH was studied. It was found that both the adsorption of β-estradiol and the PCO efficiency increased practically linearly with increasing concentration of OH-ions. The predominant role of direct β-estradiol oxidation with positively charged holes was thus indirectly confirmed.