Abstract
Aqueous phenol was ozonated for the first time at pH over 12. Results obtained under conditions favoring rapid generation of radicals completely eliminated the possibility deduced from the absorption theory that the indirect radical reaction might be one of the reaction pathways. Meanwhile, it was found in this study that the apparent first-order rate constant of phenol ozonation decreased logarithmically with increasing initial phenol concentration. On the other hand, despite the phenomenological resemblance between the two oxidation processes (the removal of aqueous phenol by ozone and horseradish peroxidase (HRP)), the mechanisms of the two processes were proved to be quite different. Results of this study also indicate that the integration of ozone and HRP did not improve the efficiency of phenol removal.
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