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A COMPARISON BETWEEN EC/UV/TiO2 AND EC/UV/ZnO SYSTEMS IN THE REMOVAL OF C.I. ACID YELLOW 23 AS A MODEL CONTAMINANT

AUTHOR/S: N. MODIRSHAHLA, M.A. BEHNAJADY, G. SAFARZADEH, M. ABDOLI, B. VAHID
Sunday 1 August 2010 by Libadmin2010

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 2, 347-354 pp

ABSTRACT

In this study, the efficiency of EC/UV/TiO2 and EC/UV/ZnO coupled systems, on the
decolorization of C.I. Acid Yellow 23 (AY23) as a model contaminant was compared. It
was found that for the efficient decolorization of 40 mg L-1 of AY23 using steel304/Al
(anode/cathode) as electrodes, with the distance of 15 mm, I = 120 A m-2, electrolyte
concentration was 800 mg L-1 for both systems, but pH and initial concentrations of
catalysts were 5.53, 800 mg L-1 for TiO2 and 6.29, 650 mg L-1 for ZnO systems,
respectively. The results also revealed that the decolorization percents for 5 min of
operation were 99.2% for EC/UV/TiO2 and 99.7% for EC/UV/ZnO systems.

Keywords: Coupled systems, Tartrazine, Electrocoagulation, Photooxidation, TiO2, ZnO