Antipyrine removal by TiO2 photocatalysis based on spinning disc reactor technology

A. J. Exposito, D. A. Patterson, W. S. W. Mansor, J. M. Monteagudo, E. Emanuelsson, I. Sanmartin, A. Duran

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The photo-degradation of the emerging contaminant antipyrine (AP) was studied and optimized in a novel photocatalytic spinning disc reactor (SDR). A heterogeneous process (UV/H2O2/TiO2) was used. TiO2 was immobilized on the surface of a glass disc using a sol-gel method. A factorial design of experiments followed by a Neural Networks fitting allowed the optimal conditions to be determined for treating 50 mg/L of AP. Under these conditions (pH= 4; [H2O2]0= 1500 mg/L; disc speed= 500 rpm; flowrate = 25 mL/s), AP was completely degraded in 120 minutes and regeneration of the disc allowed 10 cycles with no loss in efficiency. The value of the apparent volumetric rate constant was found to be 6.9•10-4 s-1 with no apparent mass transfer limitation.

Based on the main intermediates identified, a mechanism is proposed for antipyrine photodegradation: Firstly, cleavage of the N-N bond of penta-heterocycle leads to the formation of two aromatic acids and N-phenylpropanamide. An attack to the C-N bond in the latter compound produces benzenamine. Finally, the phenyl ring of the aromatic intermediates are opened and molecular organic acids are formed.
LanguageEnglish
Pages504-512
Number of pages9
JournalJournal of Environmental Management
Volume187
Early online date14 Nov 2016
DOIs
StatusPublished - 1 Feb 2017

Fingerprint

Antipyrine
Photocatalysis
Photodegradation
photodegradation
Organic acids
Carboxylic acids
organic acid
Design of experiments
Sol-gel process
cleavage
mass transfer
Rate constants
Mass transfer
gel
regeneration
glass
Impurities
Neural networks
Glass
pollutant

Keywords

  • AOPs
  • emerging contaminant
  • neural networks
  • UV radiation
  • pharmaceuticals
  • pathway

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemical Engineering (miscellaneous)
  • Catalysis
  • Fluid Flow and Transfer Processes
  • Environmental Engineering
  • Waste Management and Disposal
  • Water Science and Technology
  • Pollution

Cite this

Exposito, A. J., Patterson, D. A., Mansor, W. S. W., Monteagudo, J. M., Emanuelsson, E., Sanmartin, I., & Duran, A. (2017). Antipyrine removal by TiO2 photocatalysis based on spinning disc reactor technology. Journal of Environmental Management, 187, 504-512. https://doi.org/10.1016/j.jenvman.2016.11.012

Antipyrine removal by TiO2 photocatalysis based on spinning disc reactor technology. / Exposito, A. J.; Patterson, D. A.; Mansor, W. S. W.; Monteagudo, J. M.; Emanuelsson, E.; Sanmartin, I.; Duran, A.

In: Journal of Environmental Management, Vol. 187, 01.02.2017, p. 504-512.

Research output: Contribution to journalArticle

Exposito, AJ, Patterson, DA, Mansor, WSW, Monteagudo, JM, Emanuelsson, E, Sanmartin, I & Duran, A 2017, 'Antipyrine removal by TiO2 photocatalysis based on spinning disc reactor technology', Journal of Environmental Management, vol. 187, pp. 504-512. https://doi.org/10.1016/j.jenvman.2016.11.012
Exposito AJ, Patterson DA, Mansor WSW, Monteagudo JM, Emanuelsson E, Sanmartin I et al. Antipyrine removal by TiO2 photocatalysis based on spinning disc reactor technology. Journal of Environmental Management. 2017 Feb 1;187:504-512. https://doi.org/10.1016/j.jenvman.2016.11.012
Exposito, A. J. ; Patterson, D. A. ; Mansor, W. S. W. ; Monteagudo, J. M. ; Emanuelsson, E. ; Sanmartin, I. ; Duran, A. / Antipyrine removal by TiO2 photocatalysis based on spinning disc reactor technology. In: Journal of Environmental Management. 2017 ; Vol. 187. pp. 504-512.
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