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A Study on the Comparison of Advanced Oxidation Reactions Including UV, $Fe^{2+}$, and $H_2O_2$ for the Degradation of Pentachlorophenol  

Son, Hyun-Seok (Department of Environmental Health, School of Public Health, Seoul National University)
Kim, Moon-Kyung (Department of Environmental Health, School of Public Health, Seoul National University)
Zoh, Kyung-Duk (Department of Environmental Health, School of Public Health, Seoul National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.29, no.7, 2007 , pp. 846-851 More about this Journal
Abstract
This study was performed to compare and to examine the degradation efficiencies and degradation mechanism of pentachlorophenol(PCP) by UV, $UV/H_2O_2$, $Fe^{2+}$, $Fe^{2+}/H_2O_2$, and $UV/Fe^{2+}/H_2O_2$ processes. The pseudo-first order rate constant was compared in each process. The addition of $H_2O_2$ increased the rate constant by 13 times compared to the reaction with UV alone. The reaction rate in $Fe^{2+}$ reaction with PCP increased 4 times and 7.25 times by adding 180 mM $H_2O_2$ and 16 mM $H_2O_2$, respectively. Compared to that with $Fe^{2+}/H_2O_2$, the rate constant of the reaction with UV alone reaction increased 3.1 times. These results indicates the enhancement of reaction rate is closely related to the generation of OH radical. The degree of the iron sludge production observed in $Fe^{2+}/H_2O_2$ reaction was significantly reduced by irradiating UV in this process.
Keywords
Pentachlorophenol; UV; $Fe^{2+}$; $H_2O_2$; OH Radical;
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