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다국어 초록 (Multilingual Abstract)

We investigated and estimated at the characteristics of decomposition and by-products of N-Nitrosodimethylamine (NDMA) using a design of experiment (DOE) based on the Box-Behken design in an UV process, and also the main factors (variables) with UV intensity($X_2$) (range: $1.5{\sim}4.5\;mW/cm^2$), NDMA concentration ($X_2$) (range: 100~300 uM) and pH ($X_2$) (rang: 3~9) which consisted of 3 levels in each factor and 4 responses ($Y_1$ (% of NDMA removal), $Y_2$ (dimethylamine (DMA) reformation (uM)), $Y_3$ (dimethylformamide (DMF) reformation (uM), $Y_4$ ($NO_2$-N reformation (uM)) were set up to estimate the prediction model and the optimization conditions. The results of prediction model and optimization point using the canonical analysis in order to obtain the optimal operation conditions were $Y_1$ [% of NDMA removal] = $117+21X_1-0.3X_2-17.2X_3+{2.43X_1}^2+{0.001X_2}^2+{3.2X_3}^2-0.08X_1X_2-1.6X_1X_3-0.05X_2X_3$ ($R^2$= 96%, Adjusted $R^2$ = 88%) and 99.3% ($X_1:\;4.5\;mW/cm^2$, $X_2:\;190\;uM$, $X_3:\;3.2$), $Y_2$ [DMA conc] = $-101+18.5X_1+0.4X_2+21X_3-{3.3X_1}^2-{0.01X_2}^2-{1.5X_3}^2-0.01X_1X_2+0.07X_1X_3-0.01X_2X_3$ ($R^2$= 99.4%, 수정 $R^2$ = 95.7%) and 35.2 uM ($X_1$: 3 $mW/cm^2$, $X_2$: 220 uM, $X_3$: 6.3), $Y_3$ [DMF conc] = $-6.2+0.2X_1+0.02X_2+2X_3-0.26X_1^2-0.01X_2^2-0.2X_3^2-0.004X_1X_2+0.1X_1X_3-0.02X_2X_3$ ($R^2$= 98%, Adjusted $R^2$ = 94.4%) and 3.7 uM ($X_1:\;4.5\;$mW/cm^2$, $X_2:\;290\;uM$, $X_3:\;6.2$) and $Y_4$ [$NO_2$-N conc] = $-25+12.2X_1+0.15X_2+7.8X_3+{1.1X_1}^2+{0.001X_2}^2-{0.34X_3}^2+0.01X_1X_2+0.08X_1X_3-3.4X_2X_3$ ($R^2$= 98.5%, Adjusted $R^2$ = 95.7%) and 74.5 uM ($X_1:\;4.5\;mW/cm^2$, $X_2:\;220\;uM$, $X_3:\;3.1$). This study has demonstrated that the response surface methodology and the Box-Behnken statistical experiment design can provide statistically reliable results for decomposition and by-products of NDMA by the UV photolysis and also for determination of optimum conditions. Predictions obtained from the response functions were in good agreement with the experimental results indicating the reliability of the methodology used.

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참고문헌 (Reference)

1 조일형, "화학적 응집공정에서 요인배치 중심합성설계법을 이용한 축산폐수의 COD 제거특성 평가 및 최적화 연구" 한국물환경학회 23 (23): 111-121, 2007

2 유승호, "전자빔 공정에서 실험계획법을 이용한 살균제 Benomyl의 제거특성 및 독성평가" 대한환경공학회 30 (30): 955-960, 2008

3 조일형, "실험계획법중 Box-Behnken(박스-벤켄)법을 이용한 반응성 염료의 광촉매 산화조건 특성 해석 및 최적화" 대한환경공학회 28 (28): 2006

4 Stefan, Mihaela I., "UV Direct Photolysis of N-Nitrosodimethylamine (NDMA): Kinetic and Product Study" 85 (85): 1416-1426, 2002

5 Andrzejewski, P., "The hazard of N-nitrosodimethylamine (NDMA) formation during water disinfection with strong oxidants" 176 (176): 37-45, 2005

6 Box G, "Statistics for Experimenters: An Introduction to Design, Data Analysis, and Model Building" Wiley 1987

7 Florence, B. M, "Photocatalytic degradation of 2,4-dihydroxybenzoic acid in water: effiency optimization and mechanistic vestigations" 108 : 65-71, 1997

8 조일형, "Photo-Fenton 산화공정에서 반응표면분석법을 이용한 축산폐수의COD 처리조건 최적화 및 예측식 수립" 대한환경공학회 30 (30): 642-652, 2008

9 Lee, C., "Oxidative degradation of Nnitrosodimethylamine by conventional ozonation and the advanced oxidation process ozone/hydrogen peroxide" 41 (41): 581-590, 2007

10 Lee, C., "Oxidation of suspected N-nitrosodimethylamine (NDMA) precursors by ferrate (VI): Kinetics and effect on the NDMA formation potential of natural waters" 42 (42): 433-441, 2008