Comparison of geosmin and 2-methylisoborneol removal by conventional ozonation and co-treatment of potassium ferrate and peroxymonosulfate
Abstract
Geosmin and 2-methylisoborneol (2-MIB) are two common compounds that cause taste and odor problems in water. This study compares geosmin and 2-MIB removal from water by conventional ozonation, ferrate and peroxymonosulfate (PMS) oxidation processes. The effects of initial O3 doses, H2O2/O3 ratios, and pH on the removal efficiency of geosmin and 2-MIB were evaluated for ozonation. The addition of H2O2 and alkaline condition increased the removal efficiency by ozonation. A Box-Behnken Design was applied to study the influence of ferrate and PMS dosage and pH on the removal of geosmin. It was shown that Ferrate alone was not effective for removing geosmin, but the co-treatment of ferrate and PMS can achieve good geosmin removal.
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