The photocatalytic decolorization of Rhodamine B (RhB) was studied using packed-bed reactor and immobilized TiO2/UV System. The 20 W UV-A, UV-B and UV-C lamps were employed as the light source. The effect of shape and surface polishing extent of reflector, distance between the reactor and reflector, reactor material were investigated. The results showed that the order of the initial reaction constant with reflector shape was round > polygon > W > rhombus. The optimum distance between the reactor and reflector was 2 cm. The initial reaction constant of quartz reactor was 1.46 times higher than that of the PVDF reactor.

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.

The photocatalytic oxidation of Rhodamine B (RhB) was studied using immobilized TiO2 and fluidized bed reactor. Immobilized TiO2 onto GF/C 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, air flow rate and anion additives (NO3-, SO42-, Cl-, CO32-) competing for reaction. The results showed that the optimum dosage of the immobilized TiO2 was 40.0 g/L. Initial removal rate of immobilized TiO2 was expressed Langmuir - Hinshelwood equation.