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A Study on the Degradation Characteristics of 1,4-dioxane at Different Initial pHs with Advanced Oxidation Process Using $O_3/H_2O_2$  

Park, Jin-Do (School of Chemical Engineering and Bioengineering, University of Ulsan)
Suh, Jung-Ho (Department of Environmental & Life Chemistry, Ulsan College)
Lee, Hak-Sung (School of Chemical Engineering and Bioengineering, University of Ulsan)
Publication Information
Journal of Environmental Health Sciences / v.31, no.5, 2005 , pp. 404-410 More about this Journal
Abstract
The pH efforts on the removal of 1,4-dioxane and the biodegradobility enhancement of dioxane contaminated water were investigated using $O_3/H_2O_2$ baled advanced oxidation process. Experiments were conducted using a bubble column reactor under different initial pH. The $O_3/H_2O_2$ process effectively converted 1,4-dioxane to more biodegradable intermediates which had a maximum $BOD_5$ enhancement at pH 11 within the experimental range, precisely, when the initial pH increased, $BOD_5$ enhanced. However, in case of removal efficiencies of 1,4-dioxane during $O_3/H_2O_2$ oxidation the optimum condition was shown at pH 9 compared with pH 6 and 11. TOC and COD values were not largely changed for all reaction time. From the results of 1,4-dioxane removal efficiency, TOC, COD, and $BOD_5$ enhancement with reaction time, it was surely observed that 1,4-dioxane was just converted to biodegradable materials, not completely oxidized to carbon dioxide.
Keywords
1,4-dioxane; pH; ozone; hydrogen peroxide; TOC; Advanced oxidation process;
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