Oxidation of Levafix CA reactive azo-dyes in industrial wastewater of textile dyeing by electro-generated Fenton's reagent

被引：122
作者：
El-Desoky, Hanaa S. [1 ]
Ghoneim, Mohamed M. [1 ]
El-Sheikh, Ragaa [2 ]
Zidan, Naglaa M. [1 ]
机构：
[1] Tanta Univ, Fac Sci, Dept Chem, Analyt & Electrochem Res Unit, Tanta 31527, Egypt
[2] Zagazig Univ, Fac Sci, Dept Chem, Zagazig 44519, Egypt
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 175卷 / 1-3期
关键词：
Levafix blue and red reactive azo-dyes; Electro-Fenton's oxidation; Wastewater; Decolorization; Mineralization; ELECTROCHEMICAL OXIDATION; ANODIC-OXIDATION; IN-SITU; HYDROXYL RADICALS; AQUEOUS-SOLUTIONS; HERBICIDE 2,4-D; DEGRADATION; ACID; REMOVAL; DECOLORIZATION;
D O I：
10.1016/j.jhazmat.2009.10.089
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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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页码：858 / 865
页数：8
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