PLASMA-CATALYTIC DESTRUCTION OF TEXTILE DYEING WASTEWATER USING TITANIUM DIOXIDE

Abstract

The aim of this work is to study the destruction of Acid Blue 25 dye (AB25), used in the textile industry, by DC glow discharge generated in argon atmosphere in the absence and presence of TiO2. The effect of operational parameters such as catalyst load and pH of solution on the degradation of AB25 is investigated. It was found that the degradation rate is increased in the presence of TiO2, in comparison to discharge alone. As shown by the results, the degradation increases with treatment time until the catalyst load reaches 0.5 g L-1. The degradation maximum (90%) is obtained within 1 h of treatment, while the plasmachemical treatment without catalyst only gave 78% AB25 degradation after the same treatment time. The pH has significant influence on the dye degradation