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KMID : 1156220050310050404
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Journal of Environmental Health Sciences
2005 Volume.31 No. 5 p.404 ~ p.410
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A Study on the Degradation Characteristics of 1,4-dioxane at Different Initial pHs with Advanced Oxidation Process Using O₃/H₂O₂
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Park Jin-Do
Suh Jung-Ho
Lee Hak-Sung
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Abstract
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The pH effects on the removal of 1,4-dioxane and the biodegradability enhancement of dioxane contaminated water were investigated using O₃/H₂O₂ based advanced oxidation process. Experiments were conducted using a bubble column reactor under different initial pH. The O₃/H₂O₂ 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 O₃/H₂O₂ 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.
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