Removal Of Basic Dyes From Textile Wastewater By Applying Advanced Oxidation Process Using Fenton Reagents

In this study Advanced oxidation process using Fenton reagents is considered for the applicationrnof textile dye-house wastewater treatment. A representative basic dye-house wastewater samplernhas been brought from K.K. Textile Factory and its characteristic is analyzed and the resultrnshows that dye-house wastewaters, containing basic dyes, are hazardous to the environment sincerntheir COD & BOD values are higher than the free discharge limit values and also they are highlyrncolored even at the lower dye concentration operation cases. After characterizing the wastewater,rnadvanced oxidation of a Basic Blue 41 dyes using solar -Fenton treatment was investigated inrnbatch experiments using Box–Behnken statistical experiment design and the response surfacernanalysis. Dyestuff, H2O2 and Fe2+ concentrations were selected as independent variables in Box–rnBehnken design while color and COD removal were considered as the response functions. Colorrnremoval increased with increasing H2O2 and Fe2+ concentrations up to a certain level. Highrnconcentrations of H2O2 and Fe2+ adversely affected the color and COD removals due to hydroxylrnradical scavenging effects of high oxidant and catalyst concentrations. Both H2O2 and Fe2+rnconcentration had profound effects on decolorization. Percent color removal was higher thanrnCOD removal indicating formation of colorless organic intermediate. The optimal H2O2 / Fe2+ /rndyestuff ratio resulting in for the 99.75% color removal & 87.56% COD removal is found to bern1045mg/L / 52mg/L / 12mg/L ( 0, 0, -0.09 coded value).rnKey Words: advanced oxidation process, Box –Behnken experimental design, Fenton reagents,rnPercent color removal , percent COD removal

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