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This paper investigates the optimization of iron electrolysis-catalysed ozonation (ECO) as a candidate for micropollutant abatement. Charged iron ions are produced to catalyse the degradation of dissolved ozone and form hydroxyl radicals. Hydroxyl radicals can reduce practically any contaminant that might resist treatment by conventional wastewater processes. Tert-butyl Alcohol (TBA) was used to measure performance, due to its resistance to ozonation but ready oxidation by hydroxyl radicals. A Headspace—SPME GC–MS method was used to accurately quantify the removal of TBA. Comparison of the ECO experiments to separate electrolysis and ozonation trials suggested that the proportion of non-catalytic removal of TBA is ~9% over the reaction duration. A comparison of ECO operating at a targeted dissolved ozone concentration was made to operation at a fixed ozone supply. Catalytic removal fractions between 5 and 60% of TBA were observed, suggesting strong removal potential for ozone-resistant compounds. Optimal operation of this ECO system occurred around 4 mg/L dissolved ozone and 14–33 mg/L total iron.

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Preliminary Investigation of Optimizing Electrocatalytic Ozonation with Mild-Steel Electrodes for Hydroxyl Radical Production

  • 会议论文

  • 发表日期：

    2025年

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  • Evan Chatfield,
  • Bassim Abbassi

摘要

This paper investigates the optimization of iron electrolysis-catalysed ozonation (ECO) as a candidate for micropollutant abatement. Charged iron ions are produced to catalyse the degradation of dissolved ozone and form hydroxyl radicals. Hydroxyl radicals can reduce practically any contaminant that might resist treatment by conventional wastewater processes. Tert-butyl Alcohol (TBA) was used to measure performance, due to its resistance to ozonation but ready oxidation by hydroxyl radicals. A Headspace—SPME GC–MS method was used to accurately quantify the removal of TBA. Comparison of the ECO experiments to separate electrolysis and ozonation trials suggested that the proportion of non-catalytic removal of TBA is ~9% over the reaction duration. A comparison of ECO operating at a targeted dissolved ozone concentration was made to operation at a fixed ozone supply. Catalytic removal fractions between 5 and 60% of TBA were observed, suggesting strong removal potential for ozone-resistant compounds. Optimal operation of this ECO system occurred around 4 mg/L dissolved ozone and 14–33 mg/L total iron.