Study of Photo-catalytic Degradation of Disperse B-SE2R with UV/H2O2/TiO2 and Solar Light

Abstract

Currently, the presence of dyes in sewage, drinking, and surface water is a serious concern. To remove dye toxicity from the water reservoirs, substantial efforts were made. Among different procedures, the Advanced Oxidation Process (AOPs) is a highly recommended process for degrading disperse dyes due to its accuracy. Due to the greater efficiency of AOPs, solar light and UV/H₂O₂/TiO₂-based advanced oxidation processes were utilized to degrade the disperse dye blue SE2R (DB-SE2R). The impact of various factors, such as pH effect, H₂O₂ dosage concentration, and dye concentration, on dye degradation was investigated. A 94% degradation was achieved by the ultraviolet/hydrogen peroxide/TiO₂ method, which involves breaking down the disperse dye blue SE2R molecule into less harmful components or eliminating its toxicity from water or wastewater to the maximum extent. A 62% degradation efficacy was optimized after solar light irradiation with the TiO₂ photocatalyst. The optimal conditions for maximum degradation of DB-SE2R were 0.9 mL H₂O₂ at pH 3, achieved in 60 minutes. The assurance of results was achieved through improvements in toxicological tests (Hemolysis and Mutagenicity evaluation) and water quality parameters, including dissolved oxygen, chemical oxygen demand, and biological oxygen demand. After treatment with solar light and ultraviolet radiation, the intermediates and end products were investigated. All the major peaks disappeared after Fourier Transform Infrared Spectroscopy (FT-IR) analysis, except for some minor peaks. From the results, it was found that UV/H₂O₂/TiO₂ is an efficient method for degrading the DB-SE2R