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The photochemical decolorization of two dyes, namely Acid Yellow 54 and Basic Blue 9, was studied using the UV/H 2 O 2  and UV/Fenton processes. The effects of the amount of H 2 O 2  and FeSO 4  as well as the initial pH solution on decolorization kinetics of both the dyes were investigated. The pseudo-first order kinetic model was applied to predict the decolorization of the selected dyes at the different operational conditions and results showed that this model fitted very well with the experimental data. The obtained results also showed the efficiency of UV/Fenton process to quickly degrade aqueous effluents polluted by Acid Yellow 54 and Basic Blue 9 compared to the UV/H 2 O 2  process.

Decolorization Kinetics of Acid Azo Dye and Basic Thiazine Dye in Aqueous Solution by UV/H 2 O 2 and UV/Fenton: Effects of Operational Parameters