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Journal of Zhejiang University-SCIENCE A

, Volume 5, Issue 2, pp 198–205 | Cite as

Degradation kinetics and mechanisms of phenol in photo-Fenton process

  • HE Feng
  • Lei Le-cheng
Bioscience & Biotechnology
  • 242 Downloads

Abstract

Phenol degradation in photochemically enhanced Fenton process was investigated in this work. UV-VIS spectra of phenol degradation showed the difference between photo-Fenton process and UV/H2O2, which is a typical hydroxyl radical process. A possible pathway diagram for phenol degradation in photo-Fenton process was proposed, and a mathematical model for chemical oxygen demand (COD) removal was developed. Operating parameters such as dosage of H2O2 and ferrous ions, pH, suitable carrier gas were found to impact the removal of COD significantly. The results and analysis of kinetic parameters calculated from the kinetic model showed that complex degradation of phenol was the main pathway for removal of COD; while hydroxyl radicals acted weakly in the photo-Fenton degradation of phenol.

Key words

Phenol Photo-Fenton process Kinetics Radical oxidation Complex oxidation 

Document code

CLC number

TQ150.9 X783 

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References

  1. Andreozzi, R., Apuzzo, A.D., Marotta, R., 2000. A kinetic model for the degradation of benzothiazole by Fe3+-photo-assisted Fenton process in a completely mixed batch reactor.J. Hazardous Materials B.,80(3):241–257.CrossRefGoogle Scholar
  2. Bossmann, S.H., Oliveros, E., Göbs, S., Siegwart, S., Dahlen, E.P., Payawan, L.M., Jr, Matthias, S., Wörner, M., Braun, A.M., 1998. New evidence against hydroxyl radicals as reactive intermediates in the thermal and photochemically enhanced Fenton reactions.J. Phys. Chem. A.,102(28):5542–5550.CrossRefGoogle Scholar
  3. Bossmann, S.H., Oliveros, E., Göb, S., Kantor, M., Goeppert, A., Braun, A.M., Lei, L., Yue, P.L., 2001. Oxidative degradation of polyvinyl alcohol by the photochemically enhanced Fenton reaction. Evidence for the formation of super-macromolecules.Prog. React. Kinet. Mec.,26(2):113–137.CrossRefGoogle Scholar
  4. Gallard, H., Laat, J.D., 2000. Kinetic modeling of Fe(III)/H2O2 oxidation reactions in dilute aqueous solution using atrazine as a model organic compounds.Wat. Res.,34(12):3107–3116.CrossRefGoogle Scholar
  5. Jiang, J., Bank, J.F., Scholes, C., 1993. Subsecond time-resolved spin trapping followed by stopped-flow EPR of Fenton reaction products.J. Am. Chem. Soc.,115 (11):4742–4746.CrossRefGoogle Scholar
  6. Kremer, M.L., Stein, G., 1959. The catalytic decomposition of hydrogen peroxide by ferric perchlorate.Trans. Faraday Soc.,55(5):959–973.CrossRefGoogle Scholar
  7. Kremer, M.L., 1985. Complex visas ‘Free Radical’ mechanism for the catalytic decomposition of H2O2 by Fe3+.Int. J. Chem. Kinet.,17(12):1299–1314.CrossRefGoogle Scholar
  8. Legrini, O., Oliveros, E., Braun, A.M., 1993. Photochemical processes for water treatment.Chem. Rev.,93(2):671–698.CrossRefGoogle Scholar
  9. Lei, L., Hu, X., Yue, P.L., Bossmann, S.H., Gob, S., Braun, A.M., 1998. Oxidative degradation of polyvinyl-alcohol by the photochemically enhanced Fenton reaction.J. Photochem. Photobiol. A., Chem.,116(3):159–166.CrossRefGoogle Scholar
  10. Ollis D.F., Al-Ekabi, H., 1993. Photocatalytic Purification and Treatment of Water and Air. Elsevier, Amsterdam.Google Scholar
  11. Prousek, J., 1996. Advanced oxidation processes for water treatment. Chemical processes.Chem. Listy.,90(4): 229–237.Google Scholar
  12. Sun, Y., Pignatello, J.J., 1993. Photochemical reactions involved in the total mineralization of 2,4-D by Fe3+/H2O2/UV.Environ. Sci. Technol.,27(2):304–310.CrossRefGoogle Scholar
  13. Utset, B., Garcia, J., Casado, J., Domenech, X., Peral, J., 2000. Replacement of H2O2 by O2 in Fenton and photo-Fenton reactions.Chemosphere,41(8):1187–1192.CrossRefGoogle Scholar
  14. Walling, C., 1975. Fenton’s reagent revisited.Acc. Chem. Res.,8(5):125–131.MathSciNetCrossRefGoogle Scholar
  15. Walling, C., Amarnath, K., 1982. Oxidation of mandelic acid by Fenton’s reagent.J. Am. Chem. Soc.,104(5): 1185–1189.CrossRefGoogle Scholar
  16. Weichgrebe, D., Vogelpohl, A., 1994. A comparative study of wastewater treatment by chemical wet oxidation.Chem. Eng. Process,33(4):199–203.CrossRefGoogle Scholar

Copyright information

© Zhejiang University Press 2004

Authors and Affiliations

  • HE Feng
    • 1
  • Lei Le-cheng
    • 1
  1. 1.Department of Environmental EngineeringZhejiang UniversityHangzhouChina

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