Photocatalytic decolorization of rhodamine B by immobilized TiO2/UV in a fluidized-bed reactor
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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 wordsPhotocatalytic Degradation UV/TiO2 Fluidized-bed Dye Immobilization Adsorption
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- Ahn, K.B., Na, S.N. and Park, Y. S., “Ozone Lamp/Photocatalytic Decolorization of Rhodamine B,”Korean Soc., of Environ. Eng.,26(10), 1063 (2004).Google Scholar
- Chun, H.D., Kim, J. S., Yoon, S. M. and Kim, C.G., “Physical Properties and Photocatalytic Performance of TiO2 Coated Stainless Steel Plate,”Korean J. Chem. Eng.,18(6), 908 (2001).Google Scholar
- Fernandez, A., Lassaletta, G., Jimenez, V. M., Justo, A., Gonzalez-Elipe, A. R., Herrmann, J. M., Tahiri, H. and Ait-Ichou, Y., “Preparation and Characterization of TiO2 Photocatalysts Supported on Various Rigid Supports (Glass, Quartz and Stainless Steel). Comparative Studies of Photocatalytic Activity in Water Purification,”Appl. Catal. B: Environ.,7, 49 (1995).CrossRefGoogle Scholar
- Lim, T.H. and Kim, S.D., “Photocatalytic Degradation of Trichloroethylene over TiO2/SiO2 in an Annulus Fluidized Bed Reactor,”Korean J. Chem. Eng.,19(6), 1072 (2002).Google Scholar
- Ministry of Health Singapore,http://www.gov.sg/moh/mohiss/poison/ rhodam.html (2002).Google Scholar
- Na, Y. S.,The Treatment of Nonbiodegradable Wastewater by TiO 2 Photocatalytic Reactor, Ph. D. Thesis, Busan National University, (Korea), 54–135 (2002).Google Scholar
- Nazawa, M., Tanigawa, K., Hosomi, M., Chikusa, T. and Kawada, E., “Removal and Decomposition of Malodorants by Using Titanium Dioxie Photocatalyst Supported on Fiber Activated Carbon,”Wat. Sci. Tech.,44, 127 (2001).Google Scholar
- Park, Y. S.,Comparison of Color Removal Between Powder and Im- mobilized TiO2. In: Proceedings of the Korean Environmental Sciences Society Conference, The Korean Environmental Sciences Society, May. 16–17, Chungbook Province, pp. 267–270. ISSN 1598-6268 (2003).Google Scholar
- Shifu, C., “Photocatalytic Degradation of Organic Pesticide Containing Phosphorus by TiO2 Supported ob Fiber Glass,”Environ. Sci.,17, 33 (1996).Google Scholar
- You, Y. S., Chung, K.H., Kim, J.H. and Seo, G., “Photocatalytic Oxidation of Toluene over TiO2 Catalysts Supported on Glass Fiber,”Korean J. Chem. Eng.,18(6), 924 (2001).Google Scholar