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In this work, photocatalytic oxidation of reactive Black-5(RB-5) dye was investigated with illuminated TiO 2 . Effects of various parameters such as catalyst loading, contact time, pH and initial dye concentration on the removal efficiency of RB-5 dye was studied. Oxidation and adsorption were recognized as significant processes for the removal of RB-5 dye. Removal of RB-5 dye decreased with increasing pH and initial dye concentration. TiO 2  dosage was an important parameter for the removal of RB-5 dye. As the TiO 2  dosage increased up to 1 g/L TiO 2 , the removal efficiency of RB-5 dye was continuously enhanced. Removal trend of RB-5 was fitted well with the pseudo-first-order equation. From this work, it is possible to suggest that photocatalytic reaction with illuminated TiO 2  can be effectively applied to treat industrial wastewater contaminated with dyes.

Photocatalytic Removal of Reactive Black-5 Dye from Aqueous Solution by UV Irradiation in Aqueous TiO 2 : Equilibrium and Kinetics Study