Hydroxyl radical (HO) production during ozonation of municipal wastewater was investigated with and without liquid or solid-phase promoters. For liquid-phase promoters, an "ozone dose threshold" was observed, below which addition of H2O2 yielded no discernible increase in the rate of HO production. This threshold occurs because ozonation of bulk organics in wastewater promotes HO due to the presence of ambient promoters. Although solid-phase catalysts are reported to promote oxidation of contaminants, ozonation of effluent over TiO2 or GAC was no more effective on trace organic removal than over inert surfaces.

Original languageEnglish (US)
Pages (from-to)229-237
Number of pages9
JournalOzone: Science and Engineering
Issue number3
StatePublished - May 2014


  • Advanced Oxidation
  • Catalytic Ozonation
  • Hydrogen Peroxide
  • Ozone
  • Ozone Decomposition
  • Water Reuse

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry


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