The photocatalytic decolorization of Rhodamine B (RhB) was studied using immobilized TiO2 and fluidized bed reactor. Immobilized TiO2(length: 1～2 mm, width: 1～3 mm, thickness: 0.5～2 mm) onto silicone sealant was employed as the photocatalyst and a 30 W germicidal lamp was used as the light source and the reactor volume was 4.8 L. The effects of parameters such as the amounts of photocatalyst, initial concentration, initial pH, superficial velocity, H2O2 and anion additives. (NO3-, SO42-, Cl-, CO32-) The results showed that the optimum dosage of the immobilized TiO2 were 87.0 g/L. Initial removal rate of RhB of the immobilized TiO2 was 1.5 times higher than that of the powder TiO2 because of the adsorption onto the surface of immobilized TiO2. In the conditions of acidic pH, initial reaction rate was increased slowly and reaction time was shorted. The effect of anion type on the reaction rate was not much.

• 박영식(대구대학교 보건과학부) | Young-Seek Park Corresponding Author