H. Son, K. Zoh
Jun 22, 2012
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0
Influential Citations
11
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Journal
Industrial & Engineering Chemistry Research
Abstract
The effects of methanol and carbon tetrachloride (CT) on the degradation of 1,4-dioxane via ultrasound irradiation were investigated by estimating the production rate of H2O2 and the degradation efficiency of the substrates. At 5 and 20 °C, the production rate of H2O2 significantly decreased as methanol concentration in pure water increased and during sonolysis of 1,4-dixoane. The sonolytic efficiency of 1,4-dioxane with methanol greatly decreased over 60 min at 5 °C and 90 min at 20 °C. Production of H2O2 increased during CT sonolysis at 5 °C but decreased at 20 and 40 °C, with efficiency greatest at 5 °C. Sonolysis of 1,4-dioxane with CT was enhanced from the beginning reaction at 5 °C and 40 min at 20 °C compared to the reactions without CT but was slightly lower at 40 °C. The results elucidate sonolytic mechanisms, such as pyrolysis and redox, in relation to reaction temperature, as well as suggest sonolytic conditions for the effective degradation of CT and 1,4-dioxane.