About The Journal
  Aims and Scope
  Editorial Board
  Submit a Manuscript 
  Subscription Information
  Guidelines for Publication
  Ethics
Articles & Issues
  Search
  Issue
  Online First
  KJChE on
For Authors
  Instructions to Authors
  Ethical Responsibilities of
  Authors in KJChE
  Ethics in Publishing
  Peer Review Process
  Author's Checklist
  Copyright Transfer Form
Contact us
 
 
 
Issue
Korean Journal of Chemical Engineering,
Vol.29, No.5, 555-562, 2012
Photodecomposition of polyphenols in E. camaldulensis leaves in the presence of hybrid catalyst of titania and MCM-41 synthesized from rice husk silica
Artkla S
Photocatalytic degradation (PCD) of polyphenols (gallic acid) from E. camaldulensis leaves on TiO2/MCM-41 was investigated in order to get rid of substances harmful to aquatic life. The TiO2/MCM-41 catalysts with titania loading of 2-40% were synthesized by hydrothermal method using rice husk silica and tetraethyl orthotitanate as silica and titania sources, respectively. The obtained catalysts were characterized by XRD, TEM, Zeta potential analyzer, N2 adsorption-desorption and diffuse reflectance UV spectroscopy. Hexagonal array of MCM-41 was confirmed, but its crystallinity decreased dramatically with titania loading. Zeta potential of TiO2/MCM-41s surface varied from 2.11 to 6.00 with the increase of TiO2 from 0 to 100 wt%. Band gap energy of TiO2 shifted from 394.1 to 425.1 nm after adding 60%MCM-41 (40%TiO2/MCM-41), facilitating the ease of OH establishment. Gallic acid - a weak acid solution (pKa=4.0) around 27 ppm was favorable to dissolve in water. PCD of gallic acid was carried out on irradiating of 400W of mercury lamp. The results showed gallic acid solution about 10 wt% properly adsorbed on 10%TiO2/MCM-41 and effectively degraded at pH solution of 9.0. PCD completed at 60 minutes of irradiation time through catalyst concentration of 0.17 g/L and obeyed pseudo-first order. Intermediate products were formic, oxalic, pyruvic, malanic and maleic acids that finally mineralized to CO2 and H2O as downstream products.
Keywords: Eucalyptus; Polyphenols; Gallic Acid; MCM-41; Titania; Degradation
[References]
  1. Bravo L, Nutr. Rev., 56, 317, 1998
  2. Ahmed R, Hoque ATMR, Hossain MK, J. Forest Res.,, 19, 19, 2008
  3. Gehrke PC, Revell MB, Philbey AW, J. Fish Biol., 43, 265, 1993
  4. Abelho M, Graca MAS, Hydrobiologia., 324, 195, 1996
  5. Molina A, Reigosa MJ, Carballeira A, J. Chem. Ecol., 17, 147, 1991
  6. Azabou S, Najjar W, Gargoubi A, Ghorbel A, Sayadi S, Appl. Catal. B: Environ., 77(1-2), 166, 2007
  7. Capasso R, Evidente A, Schivo L, Orru G, Marcialis MA, Cristinzio G, J. Appl. Bacter., 79, 393, 1995
  8. Borja R, Alba J, Banks CJ, Process Biochem., 32(2), 121, 1997
  9. Kim S, Choi W, Environ. Sci. Technol., 36, 2019, 2002
  10. Vohra MS, Lee JS, Choi WY, J. Appl. Electrochem., 35(7), 757, 2005
  11. Artkla S, Kim W, Choi W, Wittayakun J, Appl. Catal. B: Environ., 91(1-2), 157, 2009
  12. Artkla S, Wantala K, Srinameb BO, Grisdanurak N, Klysubun W, Wittayakun J, Korean J. Chem. Eng., 26(6), 1556, 2009
  13. Artkla S, Choi W, Wittayakun J, Adv. Mater. Res., 93, 22, 2010
  14. Zanjanchi MA, Golmojdeh H, Arvand M, J. Hazard. Mater., 169(1-3), 233, 2009
  15. Eimer GA, Casuscelli SG, Ghione GE, Crivello ME, Herrero ER, Appl. Catal. A: Gen., 298, 232, 2006
  16. Landau MV, Vradman L, Wang XG, Titelman L, Micropor.Mesopor. Mater., 78, 117, 2005
  17. Carp O, Huisman CL, Reller A, Prog. Solid State Chem., 32, 33, 2004
  18. Artkla S, Choi W, Wittayakun J, Environment Asia., 2, 41, 2009
  19. Hoffmann MR, Martin ST, Choi WY, Bahnemann DW, Chem. Rev., 95(1), 69, 1995
  20. Konstantinou IK, Albanis TA, Appl. Catal. B: Environ., 49(1), 1, 2004
  21. Neppolian B, Choi HC, Sakthivel S, Arabindoo B, Murugesan V, Chemosphere., 46, 1173, 2002
  22. Mai JX, Sun WL, Xiong L, Liu Y, Ni JR, Chemosphere., 73, 600, 2008
  23. Eslami AC, Pasanphan W, Wagner BA, Buettner GR, Chem.Cent. J., 4, 15, 2010
  24. Kim S, Choi W, J. Phys. Chem. B, 109(11), 5143, 2005
  25. Nishiyama N, Saputra H, Park DH, Egashira Y, Ueyama K, J. Membr. Sci., 218(1-2), 165, 2003
  26. Park DH, Matsuda M, Nishiyama N, Egashira Y, Ueyama K, J. Chem. Eng. Jpn., 34(10), 1321, 2001
  27. Kim S, Choi W, Environ. Sci. Technol., 36, 2019, 2002
  28. Maira AJ, Yeung KL, Lee CY, Yue PL, Chan CK, J. Catal., 192(1), 185, 2000
  29. Beltran FJ, Gimeno O, Rivas FJ, Carbajo M, J. Chem. Technol. Biotechnol., 81(11), 1787, 2006
  30. Lee JC, Kim MS, Kim CK, Chung CH, Cho SM, Han GY, Yoon KJ, Kim BW, Korean J. Chem. Eng., 20(5), 862, 2003
  31. Lee HJ, Kang DW, Chi J, Lee DH, Korean J. Chem. Eng., 20(3), 503, 2003
[Cited By]
  1. Chen P, Bie H, Bie R, Korean Journal of Chemical Engineering, 35(9), 1911, 2018
참고문헌정보(참고문헌, 인용문헌)는 화학공학소재연구정보센터에 의해 제공되고 있습니다.