Removal of textile dyes from water by the electro-Fenton process

Abstract

International audienceAn environmentally friendly electrochemical treatment, electro-Fenton process, was applied to the depollution of a synthetic dismissal composed of three dyes, yellow drimaren, congo red and methylene blue, frequently used in textile and dyehouses. Here, we show that those dyes and their mixture are quickly degraded under current controlled electrolysis conditions, leading to an almost complete mineralization. The results show the efficiency of electro-Fenton process to quickly degrade aqueous effluents polluted by synthetic organic dyes

Oxidative degradation of direct orange 61 by electro-Fenton process using a carbon felt electrode: Application of the experimental design methodology

“…This value is in agreement with k abs values for hydroxylation reactions of aromatic compounds with hydroxyl radicals [47][48][49]. No absolute rate constant of hydroxylation of DO 61 was found in literature for comparison.…”

“…We have chosen, at first, the approach of Doehlert [48]. Indeed, these designs are formed by uniformly distributed points within the space of the coded variables (X i ).…”

Carbon sponge as a new cathode material for the electro-Fenton process: Comparison with carbon felt cathode and application to degradation of synthetic dye basic blue 3 in aqueous medium

“…On the other hand, Oturan et al reported that the mineralization efficiency values were higher than 90% for CF cathode by optimizing experimental conditions (larger electrode surface, higher applied current (300 mA), longer electrolysis time, etc.) in several cases [ 11,22,[27][28][29]. The residual TOC of the system arises from the formed carboxylic acids and particularly oxalic acid during the mineralization of BB3.…”

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

“…Recalcitrant textile wastewater typically contains high concentrations of organic compounds [expressed as high chemical oxygen demand (COD)], colors associated with residual dyes, a wide range of pH, low biodegradability, and high salt content (Balcioglu and Arslan 1997, Lahkimi et al 2006, Schrank et al 2007, Hassan et al 2009, Rodrigues et al 2009, Blanco et al 2012, Hammami et al 2012, Punzi et al 2012. The characteristics of textile wastewater are depicted in Table 2.…”