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Received October 29, 2009
Accepted June 10, 2010
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Statistical optimization of process conditions for photocatalytic degradation of phenol with immobilization of nano TiO2 on perlite granules
Chemical Engineering Department, Catalyst Research Center, Razi University, Kermanshah 67149-67346, Iran 1Pasteur Institute of Iran (IPI), Tehran 13164, Iran 2Chemical Engiveering Department, Biotechnol. Research Lab, Razi University, Kermanshah 67149-67346, Iran
sharif@razi.ac.ir
Korean Journal of Chemical Engineering, February 2011, 28(2), 531-538(8), 10.1007/s11814-010-0355-8
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Abstract
Response surface methodology (RSM) using D-optimal design was applied to optimization of photocatalytic degradation of phenol by new composite nano-catalyst (TiO2/Perlite). Effects of seven factors (initial pH, initial phenol concentration, reaction temperature, UV irradiation time, UV light intensity, catalyst calcination temperature, and dosage of TiO2/perlite) on phenol conversion efficiency were studied and optimized by using the statistical software MODDE 8.02. On statistical analysis of the results from the experimental studies, the optimum process conditions were_x000D_
as follows: initial pH, 10.7; initial phenol concentration, 0.5 mM; reaction temperature, 27 ℃; UV irradiation time, 6.5 h; UV light intensity, 250W; catalyst calcination temperature, 600 ℃; and TiO2/perlite dosage, 6 g/L. Analysis of variance (ANOVA) showed a high coefficient of determination (R2) of 91.8%.
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References
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Chen DW, Ray AK, Appl. Catal. B: Environ., 23(2-3), 143 (1999)
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Erdem TK, Meral C, Tokyay M, Erdogan TY, Cem. Concr.Compos., 29, 13 (2007)
Daneshvar N, Behnajady MA, Asghar YZ, J. Hazard. Mater., 139(2), 275 (2007)
Sakthivel S, Neppolian B, Shankar MV, Arabindoo B, Palanichamy M, Murugesan V, Sol. Energy Mater. Sol. Cells., 77, 65 (2003)
Lizama C, Freer J, Baeza J, Mansilla WD, Catal. Today, 76(2-4), 235 (2002)
Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69 (1995)
Sobana N, Swaminathan M, Sep. Purif. Technol., 56(1), 101 (2007)
Chatterjee S, Sarkar S, Bhattacharyya SN, J. Photochem. Photobiol. A., 77, 183 (1993)
Lee JC, Kim MS, Kim CK, Chung CH, Cho SM, Han GY, Yoon KJ, Kim BW, Korean J. Chem. Eng., 20(5), 862 (2003)
Ohno T, Tokieda K, Higashida S, Matsumura M, Appl. Catal. A: Gen., 244(2), 383 (2003)
Tanaka Y, Suganuma M, J. Sol-Gel Sci. Technol., 22, 83 (2001)
Kim DJ, Hahn SH, Oh SH, Kim EJ, Mater. Lett., 57, 355 (2002)
Mills A, Morris S, J. Photochem. Photobiol. A., 71, 285 (1993)
Machado NRCF, Santana VS, Catal. Today., 107, 595 (2005)
Wang CM, Heller A, Gerscher H, J. Am. Chem. Soc., 114, 5230 (1992)
Alberici RM, Jardim WF, Water Res., 28, 1845 (1994)
Sclafani A, Palmisano L, Davi E, New. J. Chem., 14, 265 (1990)
Matthews RW, J. Chem. Soc. Faraday Trans., 80(1), 457 (1984)
