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-mediated oxidation was predominantly responsible for the degradation of Cu-EDTA, as proved by the radical scavenging experiments and electron paramagnetic resonance. Based on the evolution of HPLC spectra and HPLC–MS analysis, a stepwise decarboxylation (i.e., cleavage of N–C bond) was found to responsible for the ozonation of Cu-EDTA, where six intermediates/products were identified. Thus, a plausible...
Ozonation of recalcitrant contaminants under acidic conditions is inefficient due to the lack of initiator (e.g., OH − ) for ozone to produce hydroxyl radicals (HO). In this study, we reported that benzoic acid (BA), which is inert to ozone attack, underwent efficient degradation by ozone at acidic pH (2.3). The kinetics of BA degradation and ozone decomposition were both enhanced by increasing...
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