Oxidative degradation is the most common method to remove organic contaminants from water and soil environment. Persulfate (S2O82-) is an effective oxidant for in-situ chemical oxidation due to the relatively high reactivity and stability in soil environments. Persulfate can oxidize directly organic contaminants but the reaction was kinetically slow without activation process. Persulfate could produce sulfate radical by activation processes and the radical has higher reactivity than persulfate. Current study focused on the oxidative degradation of chlorophenols with persulfate/heat. Chlorophenols have various reactivity and toxicity upon the number of chlorination. Usually highly chlorinated phenol has higher toxicity. The degradation rates were measured for monochlorophenols, dichlorophenols and trichlorophenols. The kinetics was also studied at variable activation temperature. In general, the degradation rate was faster in highly chlorinated phenols and the rates were variable among the isomers. The stability of intermediate was discussed with related with reactivity.

Oxidation of chlorophenols by persulfate/heat activation

2019 Spring National Meeting

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