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DECOLORIZATION OF ACID YELLOW 42 AS A MODEL CONTAMINANT BY FENTON AND ELECTRO-FENTON PROCESSES

AUTHOR/S: N. MODIRSHAHLA, N. GALEBSAZ-JEDDI, M. A. BEHNAJADY, A. MOHAMMADIVAND, S. GITIBAN. K, 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, 447-454 pp

ABSTRACT

The decolorization of Acid Yellow 42 (AY42) by Fenton and electro-Fenton processes
was compared. The effect of operational parameters was studied and the desired
conditions obtained in the initial dye concentration of 120 mg L-1 for H2O2/ Fe2+
([H2O2]=800 mg L-1, [Fe2+]=0.2 mmol, pH=3) and electrolysis/Fe2+/H2O2
([H2O2]=1100 mg L-1 , [Fe2+]= 0.5 mmol, pH=3.5 and distance of electrodes 10 mm)
systems. The Fenton process proved to be more efficient and occurs at a higher
oxidation rate than electro-Fenton process and allows achieving 93% decolorization of
aromatic content of AY42 in about 50 min of reaction time, whereas in electro-Fenton
processes the decolorization percent was 90%.

Keywords: Advanced oxidation processes (AOPs), Fenton; Electro-Fenton, Acid Yellow 42, Decolorization.