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A 2011 pubblication on phototransformation by Fenton's reagent is available, in fact the degradation of the dye by Fenton and photo-Fenton processes was investigated. Among advanced oxidation processes, oxidation using Fenton's reagent is an attractive treatment for the effective decolourization and degradation of dye because of its low cost and the lack of toxicity of the reagents.

The degradation rate was strongly dependent on pH, initial concentrations of Fe2 +,H2O2, temperature and light intensity. The effects of these parameters have been studied and optimum operational conditions of these two processes were found. The optimum conditions were found at pH 3 for these processes. The decolourization experiments indicate that dye can be effectively decolourized using Fenton and photo-Fenton processes with a little difference between the two processes, 91.4 and 97.8 % within 0.5 h, respectively for optimal conditions. The difference in decolourization is not similar to COD removal: with Fenton process there is significant increment (52.27 % COD removal) relatively to photo-Fenton process (only 38.63 % COD removal).