Journal
OZONE-SCIENCE & ENGINEERING
Volume 36, Issue 3, Pages 229-237Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01919512.2014.886938
Keywords
Ozone; Catalytic Ozonation; Advanced Oxidation; Water Reuse; Hydrogen Peroxide; Ozone Decomposition
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Hydroxyl radical (HO center dot) 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 center dot production. This threshold occurs because ozonation of bulk organics in wastewater promotes HO center dot 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.
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