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이동석,민병섭,박선구,김정화,류재근,Rhee, Dong-Seok,Min, Byoung-Seob,Park, Sun-Ku,Kim, Joung-Hwa,Rhyu, Jae-Keun 한국물환경학회 2004 한국물환경학회지 Vol.32 No.2
This study was carried out to investigate the formation of DBPs(Disinfection By-products) such as trihalomethane(THMs) and haloacetic acid(HAAs) by chlorination in raw water and finished water of Water Treatment Plant(WTP). The formation of THMs was increased with the increase of pH and reaction time. HAAs was found as a high formation at a pH 7 and low formation at pH 9. THMFP(Trihalomethane Formation Potential) was the highest formation potential in raw water of Pu-1 and the lowest in raw water of Pa-1. In case of HAAFP(Haloacetic acid formation potential), So-1 showed the highest value, while Pa-1 showed the lowest value. It was investigated the relationship between HAAs and organic matters which were described as DOC(dissolved organic carbon) and $UV_{254}$. In both DOC and $UV_{254}$ versus HAAFP, Pu-1 showed the good correlation coefficients($r^2$) with 0.95 and 0.84, respectively. For three WTP investigated, DBPs(THMs + HAAs) was shown over the range of $42.00{\sim}49.36{\mu}g/L$. This result might be due to the different characteristic of organic matters in raw water and the difference of chlorine dosage for a water treatment.
화학적 산화법에 의한 부식산의 분해처리 기술에 관한 연구(II) - 오존처리에 따른 분해특성 분석 -
이동석,정영림,Rhee, Dong Seok,Jung, Young-Rim 한국분석과학회 2000 분석과학 Vol.13 No.2
본 연구는 수질계의 용존 유기 탄소화합물의 주성분인 부식산을 화학적 산화방법 중 오존처리를 사용하여 $UV_{254}$ 흡광도, TOC, $^{13}C-NMR$, 한외여과법 등을 이용하여 오존 처리후의 특성 변화를 조사하였으며, 오존 산화물의 GC/MS 분석을 통하여 포름알데히드, 아세트알테히드, 아세톤, 글리옥살 및 메틸글리옥살 등의 생성을 확인하였다. $UV_{254}$ 흡광도와 TOC의 측정결과 부식산 농도 20, 100ppm 모두 오존처리시간 20분 이내에서 80%의 색도 감소율과 30분 이내에서 40-50%의 TOC 제거율을 나타냈고, 그 이후의 처리시간에서는 일정한 색도 감소율 및 제거율을 나타냈다. $^{13}C-NMR$, 한외여과법을 통한 실험결과, 오존처리에 의해 고분자량의 부식산이 산화, 분해됨으로서 알데히드, 카르복실산 등이 풍부한 저분자량의 단위체로 나뉘어지며 생물학적 분해가 용이한 지방족 탄소가 풍부한 구조로 전환됨를 확인하였다. In this paper, ozonation of humic acid in water was characterized using $UV_{254}$ absorbance, TOC, Ultra Filtration and $^{13}C-NMR$. Also, carbonyl compounds in ozonated water were analyzed by GC/MS using PFBOA method. Ozonation by-products of water containing humic acid were determined as formaldehyde, acetaldehyde, acetone, glyoxal and methylglyoxal. Results of $UV_{254}$ absorbance and TOC with ozonation time at humic acid 20, 100ppm represent that decrease rate of 80% within ozonation time is 20 min and TOC removal rate of 40-50% within ozonation time is 30 min. Results for $^{13}C-NMR$ and Ultra Filtration, humic acid of high molecular weight by ozonation are oxidated and decomposed so that it was conversed low molecular weight such as aldehydes, carboxylic acid.
수소 이온 농도 변화에 따른 부식산의 금속착물 형성에 관한 연구
이동석 ( Dong Seok Rhee ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.3
The Complex formation of the humic acid (isolated from ground water) with trivalent metal, americium, has been examined by absorption spectroscopy at varing pH-value, 6.0 to 3.0. In the study of the complexation, the Proton Exchange Capacity (PEC) of the humic acid was characterized. And the loading capacity of the humic acid for the metal ion was determined separately at each pH. The loading capacities were reduced with reducing pH. The description of the complexation of humic acid with metal was based on a model as simple as possible. Taking the loading capacity into account, the humate complexation constant is found to be independent of pH. The overall complexation constants at every pH value lie between 6.02 and 6.33 in 0.1 M NaClO₄.