Decolorization and mineralization of C.I. Acid Yellow 23 by Fenton and photo-Fenton processes

The degradation of azo dye C.I. Acid Yellow 23 (AY23) by Fenton and photo-Fenton processes was investigated. The degradation rate is strongly dependent on the pH, initial concentrations of the dye, Fe 2+, H 2O 2 and UV light intensity. The effect of these parameters has been studied and the optimum...

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Bibliographic Details
Published inDyes and pigments Vol. 73; no. 3; pp. 305 - 310
Main Authors Modirshahla, N., Behnajady, M.A., Ghanbary, F.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2007
Subjects
Advanced oxidation processes (AOPs)
C.I. Acid Yellow 23
Decolorization
Fenton
Photo-Fenton
Photooxidation
Photo-Fenton
Fenton
Decolorization
Advanced oxidation processes (AOPs)
C.I. Acid Yellow 23
Photooxidation
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Summary:The degradation of azo dye C.I. Acid Yellow 23 (AY23) by Fenton and photo-Fenton processes was investigated. The degradation rate is strongly dependent on the pH, initial concentrations of the dye, Fe 2+, H 2O 2 and UV light intensity. The effect of these parameters has been studied and the optimum operational conditions of these two processes were found. The optimum conditions were obtained at pH = 3 for the H 2O 2/Fe 2+ and UV/H 2O 2/Fe 2+ systems. The photo-Fenton process proved to be the most efficient and occurs at a much higher oxidation rate than Fenton process and allows achieving 90% degradation of aromatic content of AY23 in about 10 min of reaction time.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2006.01.002