Korean Journal of Chemical Engineering

, Volume 22, Issue 2, pp 196–200 | Cite as

Photocatalytic decolorization of rhodamine B by immobilized TiO2/UV in a fluidized-bed reactor



The photocatalytic oxidation of Rhodamine B (RhB) was studied by using a newly developed immobilized photocatalyst (TiO2 immobilized by support consisting of a perlite and silicone sealant) and a fluidized-bed reactor. Three 8W germicidal lamps were used as the light source and the reactor volume was 2.8l. When this photocatalyst was employed in a batch process, a total decolorization of the RhB in reaction times lower than 60 min was observed. The optimum dosage of photocatalyst was 33.8 g/l. The initial RhB decolorization rate of the immobilized TiO2 was higher than that of the suspended TiO2 and this did not agree with pseudo first-order kinetics because of the adsorption onto the surface of the immobilized TiO2. This result indicated that the adsorption capacity of the immobilized photocatalyst is very important in photocatalysis.

Key words

Photocatalytic Degradation UV/TiO2 Fluidized-bed Dye Immobilization Adsorption 


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Copyright information

© Korean Institute of Chemical Engineering 2005

Authors and Affiliations

  1. 1.R&D Laboratory, Segye Chemical Co. Ltd.KyungnamKorea
  2. 2.Department of Chemical EngineeringPusan National UniversityBusanKorea
  3. 3.Department of Environmental HygieneDaegu UniversityGyeongbukKorea

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