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Abstract The present work focuses on the performance of Fenton, sono‐Fenton, and sono‐photo‐Fenton processes for the oxidation of phenol present in aqueous solution. The effects of H 2 O 2 concentration, Fe 2+ concentration, pH, and initial phenol concentration on the oxidation of phenol were studied. The optimum Fe 2+ and H 2 O 2 concentrations for the Fenton process were 45 and 800 mg/L, respectively. For the sono‐Fenton process, the optimum Fe 2+ and H 2 O 2 concentrations were 30 and 800 mg/L, respectively. The optimal conditions for the sono‐photo‐Fenton process were found to be 20 mg/L of Fe 2+ and 700 mg/L of H 2 O 2 . The optimum pH was found to be 3 for the processes investigated in the present study. The analysis of results showed that the sono‐photo‐Fenton method reduced the Fe 2+ concentration by 30–50% and the H 2 O 2 concentration by 12.5%. It was found that the sono‐photo‐Fenton technique showed better performance than the Fenton and sono‐Fenton processes for the oxidation of phenol. A lumped kinetic model was used to predict the chemical oxygen demand reduction and the model was found to fit the data.
Ponnusami et al. (Mon,) studied this question.
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