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Effect of UV Irradiation and TiO2 Addition on the Ozonation of Pyruvic Acid

피루브산의 오존산화반응에 미치는 TiO2 첨가 및 UV 조사의 영향

  • Received : 2015.11.10
  • Accepted : 2015.12.04
  • Published : 2016.01.30

Abstract

Ozonation was investigated for its ability to remove pyruvic acid in a laboratory-scale batch reactor under various experimental conditions, including UV irradiation, TiO2 addition, and variations in temperature. An ozone flow rate of 1.0 L min-1 and a concentration of 75±5 mg L-1 were maintained throughout the experiment, and pH, COD, and TOC were measured at 10 min intervals during a 60 min reaction. Our results confirmed that the combination of UV irradiation and photocatalytic TiO2 in the ozonation reaction improved the removal efficiency of both COD and TOC in aqueous solution at 20℃. Pseudo first-order rate constants and activation energies were quantified based on the COD and TOC measurements. We observed that the O3/UV, O3/UV/TiO2 system increased mineralization and reduced the activation energy (Ea) necessary for pyruvic acid decomposition.

Keywords

Activation energy;Ozonation;Pyruvic acid;TiO2 photocatalyst

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