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Received March 14, 2008
Accepted May 3, 2008
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Effect of dissolved oxygen concentration and light intensity on photocatalytic degradation of phenol
Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600 036, India, Korea
kannan@iitm.ac.in
Korean Journal of Chemical Engineering, November 2008, 25(6), 1300-1308(9), 10.1007/s11814-008-0213-0
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Abstract
Catalyst loading is an important parameter that needs to be optimized in the operation of photocatalytic slurry reactors. In this study on photocatalytic degradation of phenol, the optimum catalyst loading was found to depend mainly on the dissolved oxygen (DO) concentration in the aqueous solution, especially at higher irradiation intensities. The estimated Langmuir-Hinshelwood (L-H) kinetics constants were found to vary with light intensity and dissolved_x000D_
oxygen concentration. The intermediate products of photocatalytic oxidation were identified.
Keywords
References
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Peral J, Casado J, Domenech J, J. Photochem. Photobiol., A, 44, 209 (1988)
Terzian R, Serpone N, J. Photochem. Photobiol., A, 89, 163 (1995)
Ilisz I, Laszlo Z, Dombi A, Appl. Catal. A: Gen., 180(1-2), 25 (1999)
Almquist CB, Biswas P, Chem. Eng. Sci., 56(11), 3421 (2001)
Wang C, Heller A, Gerischer H, J. Am. Chem. Soc., 114, 5230 (1992)
Stafford U, Gray KA, Kamat PV, J. Catal., 167(1), 25 (1997)
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Herrmann JM, Guillard C, Pichat P, Catal. Today, 17, 7 (1993)
Chen DW, Ray AK, Appl. Catal. B: Environ., 23(2-3), 143 (1999)
Kim IK, Ha HJ, Lee SK, Lee JK, Korean J. Chem. Eng., 22(3), 382 (2005)
Salaices M, Serrano B, de Lasa HI, Chem. Eng. Sci., 59(1), 3 (2004)
Bekkouche S, Bouhelassa M, Salah NH, Meghlaoui FZ, Desalination, 166(1-3), 355 (2004)
Curco D, Malato S, Blanco J, Gimenez J, Marco P, Sol. Energy, 56(5), 387 (1996)
Clescerl LS, Greenberg AE, Eaton AD, Eds., Standard methods for the examination of water and wastewater 18th edition, APHA-AWWA-WEF (1992)
Hatchard CG, Parker CA, Proc. R. Soc. A, 235, 518 (1956)
Gerischer H, Electrochim. Acta, 40(10), 1277 (1995)
Matthews RW, Water Res., 24, 653 (1990)
Brezova V, Stasko A, J. Catal., 147(1), 156 (1994)
Okamoto K, Yamamoto Y, Tanaka H, Itaya A, Bull. Chem. Soc. Jpn., 58, 2023 (1985)
Turchi CS, Ollis DF, J. Catal., 119, 483 (1989)
Chhor K, Bocquet JF, Colbeau-Justin C, Mater. Chem. Phys., 86(1), 123 (2004)
Emeline AV, Ryabchuk V, Serpone ,, J. Photochem. Photobiol., A, 133, 89 (2000)
Xu Y, Langford CH, J. Photochem. Photobiol., A, 133, 67 (2000)
Sobczynski A, Duczmal L, Zmudzinski W, J. Mol. Catal. A-Chem., 213(2), 225 (2004)
Ollis DF, J. Phys. Chem. B, 109(6), 2439 (2005)
Serpone N, J. Photochem. Photobiol., A, 104, 1 (1997)
Bosco MC, Garrido M, Larrechi MS, Anal. Chim. Acta, 559, 240 (2006)
Sun B, Smirniotis PG, Catal. Today, 88(1-2), 49 (2003)
Zhang L, Kanki T, Sano N, Toyoda A, Environ. Monit. Assess., 115, 395 (2006)
