화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.10, No.5, 701-704, September, 2004
Oxidation of Chlorothalonil in Aqueous Solution by Means of UV, H2O2/UV, Oxalate/UV, and Oxalate-Assisted H2O2/UV Irradiation
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The degradation of chlorothalonil was explored using UV, H2O2/UV, Oxalate/UV, and oxalate assisted H2O2irradiation. The optimum initial hydrogen peroxide and oxalate concentrations in the photolysis were about 100 mg L-1 and 1 mM, respectively. The optimum pseudo-first-order reaction rate constants for UV (kuv), H2O2/UV (kH2O2), oxalate/UV (koxalate), and oxalate-assisted H2O2/UV (kH2O2-oxalate) irradiation processes were 0.186, 0.357, 0.520, and 1.806 min-1, respectively. A TOC analysis of the solution indicates that chlorothalonil is largely decomposed to carbon dioxide by the oxalate-assisted H2O2/UV irradiation process. In our experiments, the oxalate-assisted H2O2/UV irradiation process was the most effective method for the degradation of chlorothalonil relative to the use of UV alone or the H2O2/UV irradiation processes.
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