Evaluation of synthesized ozone by dielectric barrier discharge plasma for degradation of anionic dyes from their solutions

Abstract

DEGRADATION of hardly degradable textile dyes in wastewater using dielectric barrier discharge (DBD) plasma method becomes a competitive technology for primary decomposition. In the same trend, new complex Dielectric Barrier Discharge Plasma device has been used in this study to evaluate its results in degradation of textile dyes. The six dyes used are from different classes (acid, basic and reactive) and structure to cover all the bases of dye. Different parameters as exposure time, ozone and dye concentration and their effect on% efficiency (η) of color removal of dyes from their solution were investigated. The de-colorization kinetics and both chemical oxygen demand (COD), the effect of final product of the degradation process on the aquatic live is expressed using biological oxygen demand (BOD) analysis. The resultant study shows that, the maximum color removal was obtained by treating the dye solution for 90 sec using ozone concentration 20g/m2 and concentration of dye 0.5g/l for all the dye. Kinetic studies were been also considered and the obtained results were following first-order reaction.