H₂O₂-assisted photolysis of reactive dye BES golden yellow simulated wastewater

Reactive dye BES golden yellow simulated wastewater was treated with H₂O₂-assisted photolysis method. Influences of factors such as reaction time, initial pH and H₂O₂ dosage were investigated, and the reaction kinetics of the process were explored. Results showed that, the degradation of 200 mg/L BES golden yellow solution happened only in the presence of both conditions: UV irradiation and H₂O₂ addition. Initial pH and H₂O₂ dosage had remarkable influence on the removal efficiency of the dye. Through several groups of univariate experiments, the optimum pH and H₂O₂ dosage of the photolysis process were found to be 6–7 and 0.0375 mL 30% H₂O₂ per milligram of BES golden yellow, respectively. The photolysis process was approximately in accordance with the second-order kinetic equation.