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Recent developments of advanced oxidation processes (AOPs), have led to new improvements of the oxidative degradation of the organic compounds.While most photocatalytic studies have used anatase TiO2 as photocatalyst for single model compound, numerous studies have been carried out to evaluate the potentiality of TiO2.Among others, several dyes appear as a model compound at same time for degradation of dye in aqueous system.In this work, a completive photodegradation study of the triarylmethane dyes is reported in aqueous TiO2 suspensions.The effect of various adsorbed dye in TiO2 aqueous suspension was studied.