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Oxidation of Levafix CA reactive azo-dyes in industrial wastewater of textile dyeing by electro-generated Fenton's reagent
Faculty
Science
Year:
2010
Type of Publication:
Article
Pages:
858-865
Authors:
El-Desoky, Hanaa S, Ghoneim, Mohamed M, El-Sheikh, Ragaa, Zidan, Naglaa M
DOI:
10.1016/j.jhazmat.2009.10.089
Journal:
JOURNAL OF HAZARDOUS MATERIALS ELSEVIER SCIENCE BV
Volume:
175
Research Area:
Engineering; Environmental Sciences \& Ecology
ISSN
ISI:000274490400109
Keywords :
Levafix blue and red reactive azo-dyes, Electro-Fenton's oxidation, Wastewater, Decolorization, Mineralization
Abstract:
The indirect electrochemical removal of pollutants from effluents has become an attractive method in recent years. Removal (decolorization and mineralization) of Levafix Blue CA and Levafix Red CA reactive azo-dyes from aqueous media by electro-generated Fenton's reagent (Fe(2+)/H(2)O(2)) using a reticulated vitreous carbon cathode and a platinum gauze anode was optimized. Progress of oxidation (decolorization and mineralization) of the investigated azo-dyes with time of electro-Fenton's reaction was monitored by UV-visible absorbance measurements, Chemical oxygen demand (COD) removal and HPLC analysis. The results indicated that the electro-Fenton's oxidation system is efficient for treatment of such types of reactive dyes. Oxidation of each of the investigated azo-dyes by electro-generated Fenton's reagent up to complete decolorization and approximately 90-95\% mineralization was achieved. Moreover, the optimized electro-Fenton's oxidation was successfully applied for complete decolorization and approximately 85-90\% mineralization of both azo-dyes in real industrial wastewater samples collected from textile dyeing house at El-Mahalla El-Kobra, Egypt. (C) 2009 Elsevier B.V. All rights reserved.
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