O3/H2O2 고급산화공정에서 초기 pH 변화에 따른 1,4-dioxane의 제거 특성 연구

A Study on the Degradation Characteristics of 1,4-dioxane at Different Initial pHs with Advanced Oxidation Process Using O3/H2O2

The pH effects on the removal of 1,4-dioxane and the biodegradability enhancement of dioxane contaminated waterwere investigated using O3/H2O2 based advanced oxidation process. Experiments were conducted using a bubble columnreactor under different initial pH. The O3/H2O2 process effectively converted 1,4-dioxane to more biodegradableintermediates, which had a maximum BOD5 enhancement at pH 11 within the experimental range, precisely, when theinitial pH increased, BOD5 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 largelychanged for all reaction time. From the results of 1,4-dioxane removal efficiency, TOC, COD, and BOD5 enhancementwith reaction time, it was surely observed that 1,4-dioxane was just converted to biodegradable materials, not completelyoxidized to carbon dioxide.