Issue
Korean Journal of Chemical Engineering,
Vol.22, No.2, 196-200, 2005
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 2.8 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.
[References]
  1. Ahn KB, Na SN, Park YS, Korean Soc. Environ. Eng., 26(10), 1063, 2004
  2. Bhatkhande DS, Pangarkar VG, Beenackers AACM, Water Res., 37, 1223, 2003
  3. Chai YS, Lee JC, Kim BW, Korean J. Chem. Eng., 17(6), 633, 2000
  4. Chun HD, Kim JS, Yoon S, Kim CG, Korean J. Chem. Eng., 18(6), 908, 2001
  5. Fernandez A, Lassaletta G, Jimenez VM, Justo A, Gonzalezelipe AR, Herrmann JM, Tahiri H, Aitichou Y, Appl. Catal. B: Environ., 7(1-2), 49, 1995
  6. Lim TH, Kim SD, J. Chem. Eng., 19(6), 1072, 2002
  7. Mattews RW, Water Res., 24, 653, 1990
  8. Mazzarino I, Piccinini P, Spinelli L, Catal. Today, 48(1-4), 315, 1999
  9. Ministry of Health Singapore, http://www.gov.sg/moh/mohiss/poison/rhodam.html, 2002
  10. Na YS, The Treatment of Nonbiodegradable Wastewater by TiO2 Photocatalytic Reactor, Ph. D. Thesis, Busan National University, (Korea), 54-135, 2002
  11. Nam WS, Han GY, Korean J. Chem. Eng., 20(1), 180, 2003
  12. Nam WS, Kim JM, Han GY, Chemosphere, 47, 1019, 2002
  13. Nazawa M, Tanigawa K, Hosomi M, Chikusa T, Kawada E, Water Sci. Technol., 44, 127, 2001
  14. Park YS, Comparison of Color Removal Between Powder and Immobilized 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
  15. Pozzo RL, Baltanas MA, Cassano AE, Catal. Today, 54(1), 143, 1999
  16. Pozzo RL, Giombi JL, Baltanas MA, Cassano AE, Catal. Today, 62(2-3), 175, 2000
  17. Rachel A, Lavedrine B, Subrahmanyam M, Boule P, Catalysis Communications, 3, 165, 2002
  18. Schmelling DC, Gray KA, Water Res., 29, 2651, 1995
  19. Shifu C, Environ. Sci., 17, 33, 1996
  20. Shourong Z, Qingguo H, Jun Z, Bingkun W, J. Photochem. Photobiol. A-Chem., 108, 235, 1997
  21. Spadary JT, Isebelle L, Renganathan V, Environ. Sci. Technol., 28, 1389, 1994
  22. Sunada F, Heller A, Environ. Sci. Technol., 32, 282, 1998
  23. Takeda N, Iwata N, Torimoto T, Yoneyama H, J. Catal., 177(2), 240, 1998
  24. Tang WZ, An H, Chemosphere, 31, 4157, 1995
  25. Turchi CS, Ollis DF, J. Catal., 119, 483, 1989
  26. You YS, Chung KH, Kim JH, Seo G, Korean J. Chem. Eng., 18(6), 924, 2001
  27. Zhu C, Wang L, Kong L, Yang Z, Wang L, Zheng S, Chen F, MaiZhi F, Zong H, Chemosphere, 41, 303, 2000