Kinetics of ultrasonic degradation of phenol in the presence of TiO 2 particles

Masaki Kubo, Kunihiro Matsuoka, Atsushi Takahashi, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)

Abstract

The degradation of phenol by ultrasonic irradiation in the presence of TiO2 was investigated in complete darkness. The effects of amount of TiO2 and the combination of TiO2 addition with gas (air or oxygen) supply on the degradation kinetics of phenol and the formation of the reaction products were examined. The degradation rate of phenol increased with the amount of TiO2. As the dissolved oxygen concentration increased by supplying oxygen, the degradation rate of phenol also increased. A kinetic model for the disappearance of phenol was proposed. The model takes into account the OH radical formation by direct water degradation, indirect degradation by oxygen atom and indirect degradation by TiO2 catalysis. The calculated results explained well the fact that a higher amount of TiO 2 and dissolved oxygen concentration gave faster disappearance rate.

Original languageEnglish
Pages (from-to)263-269
Number of pages7
JournalUltrasonics Sonochemistry
Volume12
Issue number4
DOIs
Publication statusPublished - 2005 Mar

Keywords

  • 82.30.Lp
  • Kinetics
  • OH radical
  • Phenol
  • TiO particles
  • Ultrasonic degradation

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

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