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Received October 6, 2004
Accepted December 10, 2004
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Photocatalytic Decolorization of Rhodamine B by Immobilized TiO2/UV in a Fluidized-bed Reactor
R&D Laboratory, Segye Chemical Co. Ltd., Kyungnam 626-110, Korea 1Department of Chemical Engineering, Pusan National University, Busan 609-735, Korea 2Department of Environmental Hygiene, Daegu University, Gyeongbuk 712-830, Korea
Korean Journal of Chemical Engineering, March 2005, 22(2), 196-200(5), 10.1007/BF02701484
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Abstract
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 2.8 l. 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.
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Spadary JT, Isebelle L, Renganathan V, Environ. Sci. Technol., 28, 1389 (1994)
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Takeda N, Iwata N, Torimoto T, Yoneyama H, J. Catal., 177(2), 240 (1998)
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