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http://dx.doi.org/10.14481/jkges.2011.12.10.7

Statistical Analysis of The Influence of Inorganic Anions on MTBE Decomposition by Photolysis(UV/H2O2)  

Chun, Sukyoung (경기대학교 환경에너지시스템공학과)
Chang, Soonwoong (경기대학교 환경에너지시스템공학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.12, no.10, 2011 , pp. 57-62 More about this Journal
Abstract
This study investigated the effects of various inorganic anions($Cl^-$, $NO_3{^-}$, $HCO_3{^-}$) on the Methyl tert Butyl Ether(MTBE) degradation by photocatalysis using statistical method. Generally, this process in general demands the generation of hydroxyl radicals(OH radical) in solution in the presence of UV light. The generation of radicals were affected by inorganic anions in solution that inhibited the photodegradation by their trapping hydroxyl radicals. The effects of inorganic anions were mathematically described as the independent variables such as $Cl^-$, $NO_3{^-}$, and $HCO_3{^-}$, and these were designed by mixture analysis that was one of the response surface methodology(RSM). Regression analysis on ANOVA showed significant p-value(p<0.0001) and high coefficients for determination value($R^2$=99.28%, ${R^2}_{adj}$=98.91%). Contour and response surface plots showed that the effects of inorganic anions for MTBE photodegradation based on $UV/H_2O_2$ process. In the result, $Cl^-$ and $HCO_3{^-}$ inhibited the photodegradation of the MTBE by their trapping hydroxyl radicals, and the interaction by these two factors was observed.
Keywords
MTBE; Anion; Mixture analysis; Response surface methodology(RSM);
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