Treatment of Textile Wastewater Containing Reactive Blue 19 Dye Using Nano TiO 2 in the Presence of UV/H 2 O 2

Decolorization and mineralization of textile wastewater is studied here using various Advanced Oxidation Processes (AOPs) like Ultraviolet (UV), UV/TiO2, UV/H2O2, and UV/H2O2/TiO2. Further, the influence of various operational parameters like pH, catalyst loading, H2O2 concentration and contact time on the rate of decolorisation has also been studied. The degradation study is estimated using Chemical Oxygen Demand (COD) and compound reduction, using UV-visible spectrophotometer, and further conformed by Gas Chromatography and Mass Spectrometry (GC/MS) techniques. The relative order established was UV/H2O2/TiO2>UV/H2O2>UV/TiO2>UV. Among all the processes studied, the UV/H2O2/TiO2 process was found to be the most efficient decolorization process observed under the optimum conditions of pH at 3.0, 50 mgL–1 of H2O2 and 1.0 g/L of TiO2. Kinetic constants are evaluated using first order equations to determine the rate constant.