Optimization of mild solar TiO2 photocatalysis as a tertiary treatment for municipal wastewater treatment plant effluents

L. Prieto-Rodriguez, S. Miralles-Cuevas, I. Oller, P Fernandez Ibanez, A. Agüera, J. Blanco, S. Malato

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The appropriate catalyst concentration for industrial wastewater treatment is several hundred milligrams per liter in solar photoreactors. Nonetheless, when the purpose of eliminating emerging contaminants in municipal wastewater treatment plant effluents is for reuse of the water, and they are present at extremely low concentrations, a tertiary treatment with a much lower photocatalyst concentration might be possible. TiO2 concentrations of only tens of mg L−1 were selected to evaluate the influence of catalyst load, initial hydrogen peroxide dose and radiation intensity on the degradation rate of five emerging contaminants (100 g L−1 of ofloxacin, sulfamethoxazole, flumequine, carbamazepine, and 2-hydroxy- biphenyl) spiked in a real municipal wastewater treatment plant effluent. Response surface methodology based on a spherical central composite design was used to optimize the parameters to find the maximal degradation rate. The experiments were carried out using an Evonik P-25 titanium dioxide suspension in a Suntest solar simulator. It has been demonstrated that the use of hydrogen peroxide is highly rec- ommendable for working with TiO2 at low concentrations and high photon flux must be avoided. It has also been demonstrated that too low (less than 40 mg L−1 ) TiO2 concentration is not recommendable.
LanguageEnglish
Pages119-125
JournalApplied Catalysis B: Environmental
Volume128
DOIs
Publication statusAccepted/In press - 22 Apr 2012

Fingerprint

Photocatalysis
Wastewater treatment
hydrogen peroxide
Effluents
catalyst
flumequine
effluent
Hydrogen peroxide
Hydrogen Peroxide
degradation
pollutant
Impurities
simulator
Sulfamethoxazole
Degradation
Catalysts
Ofloxacin
Carbamazepine
Photocatalysts
Titanium dioxide

Keywords

  • Emerging contaminants
  • Photocatalysis
  • Solar photoreactors

Cite this

Prieto-Rodriguez, L. ; Miralles-Cuevas, S. ; Oller, I. ; Fernandez Ibanez, P ; Agüera, A. ; Blanco, J. ; Malato, S. / Optimization of mild solar TiO2 photocatalysis as a tertiary treatment for municipal wastewater treatment plant effluents. In: Applied Catalysis B: Environmental. 2012 ; Vol. 128. pp. 119-125.
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Optimization of mild solar TiO2 photocatalysis as a tertiary treatment for municipal wastewater treatment plant effluents. / Prieto-Rodriguez, L.; Miralles-Cuevas, S.; Oller, I.; Fernandez Ibanez, P; Agüera, A.; Blanco, J.; Malato, S.

In: Applied Catalysis B: Environmental, Vol. 128, 22.04.2012, p. 119-125.

Research output: Contribution to journalArticle

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