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다변량통계분석을 이용한 수질오염총량관리 단위유역별 오염물질 배출특성 분석 -한강수계를 중심으로-
최옥연 ( Ok Youn Choi ),김기훈 ( Ki Hoon Kim ),한인섭 ( Ihn Sup Han ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.6
The characteristic of the water quality and pollutant discharge was analyzed at the units watershed of the total amount management in Han-river basin, and after classified in a similar area by multivariate statistical analysis, the main trend such as the water quality trend and pollutant discharge characteristic were analyzed. As a result of this study, the density of the pollutant at the unit watershed is not necessarily identified as discharge density, and the primary management watershed and targeted substances were analyzed depending on the operating status of the environmental infrastructure in watershed and the main pollution factor and discharge path per pollutants. As a result of cluster analysis, watersheds were classified into four groups according to discharge characteristics. It will be used when selecting target area of primary management that is appropriate to the characteristics of each river and establishing efficient water quality improvement plans.
GAC 의 화학적 및 열적 재생과 재생후 흡착 특성 : 2 . 무산소 조건 및 용존천연유기물질의 영향
한인섭(Ihn Sup Han),조용균(Yong Kyun Cho) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.4
Preloaded GAC with phenol and HA and virgin GAC were used for investigating the change of adsorption capacities and the effects of DO and NOM. The experiments were conducted at pH 7 and 23±1℃ under the anoxic condition. All the experimental procedures for anoxic experiments were performed in an anaerobic chamber except tumbling the samples. Specifically, preloaded GAC with HA under the anoxic condition was used for the oxic and anoxic adsorption experiments after regeneration by thermal or chemical methods. i) Adsorption of phenol and DNT with virgin GAC Freundlich isotherm equations were q_e=23.8C_e^(1/0.420) and q_e=119.5C_e^(1/0.274) for phenol and DNT, respectively, whose adsorption capacities were smaller than those of the oxic experiment. It was observed that adsorption capacity for phenol decreased more than that for DNT depending on the presence/absence of DO. It was possibly due to transformation (or oxidative coupling(s)) reactions) on the GAC surface in the presence of DO. To get the equilibrium between liquid and solid phases, it required one week or shorter and the trend observed in the oxic experiments that the longer contact time, the less extraction efficiencies, was not shown. ii) Adsorption of phenol and DNT with preloaded GAC. Depending on the regeneration methods and preloading compounds, the differences of adsorption capacities were observed. Regenerated GAC after preloading with phenol showed approximately 10 to 20% decrease in adsorption capacities for phenol and 5 to 15% decrease for DNT. Adsorption capacity was larger after thermal regeneration, especially for HA-polluted GAC. Re-adsorption capacity (that is, adsorption capacity after regeneration) was greatly affected by the preloading materials.
한강수계 내 Melamine 농도검출과 GAC처리에서의 파과모델링
이상중(Sang Jung Lee),이재엽(Jai Yeop Lee),한인섭(Ihn Sup Han) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.10
현재, melamine은 레진, 내화제, 접착제, 라미네이트 등 우리 생활에 다양하게 사용되고 있다. 그로 인해 melamine이 포함된 폐수의 수계 유입 또한 증가하고 있다. EU안전지침서의 GHS에는 melamine을 암 유발 가능성이 있는 물질로 구분하고 있다. 하지만 아직까지 melamine에 대한 독성연구는 진행 중이며 어떤 영향을 주는지 아직까지 밝혀진 사실이 적다. 본 연구에서는 한강과 주변하천의 melamine 오염 정도를 HPLC/UV를 이용하여 오염 정도를 파악하였다. 그리고 활성탄을 이용한 흡착실험 및 모델링에 관한 연구를 하였다. 우선 한강수계 중 상대적으로 상류에 있는 팔당댐 근교와 그보다 하류지역인 뚝섬유원지에서 동일한 시료를 3개씩 채수하였고 한강에 유입되는 하천 중 홍릉천, 왕숙천, 청계천에서 동일하게 시료를 채수하여 정제 후 melamine 농도를 측정하였다. 그 결과 팔당댐 근교의 시료에서는 melamine이 검출되지 않았으며 그보다 상대적으로 하류인 뚝섬유원지에서는 0.312 μg/L농도가 검출되었다. 왕숙천에는 0.578 μg/L로 가장 높았으며 청계천과 홍릉천은각 0.197 μg/L, 0.325 μg/L로 검출되었다. 전체적으로 낮은 농도지만 대부분의 지점에서 melamine의 검출을 확인할 수 있었다. 1970년대에는 melamine 생산량이 200,000 ton에서 최근에는 1,400,000 ton으로 계속적인 사용의 증가로 수계오염은 심화될것으로 보인다. 활성탄을 이용한 흡착 실험에서는 활성탄 크기에 따라 melamine흡착에 약간의 차이를 보였으나 파과모델과 어느 정도 일치함을 보였다. Currently, melamine is being used variously in our lives such as resins, flame retardants, adhesive, laminate etc. And understandably sewer of stream of wastewater containing Melamine has also increased. GHS (Globally Harmonized System of Classification and Labelling of Chemicals) of EU safety guidelines says that it can cause cancer. Still, study on toxicity of Melamine is going on. In this research, melamine contamination level of the Han River and River Basin was analyzed by HPLC/UV. And the experiments of GAC adsorption were conducted and the model was studied. We collected the 3 same samples at the suburbs of Paldang Dam located in the relative upstream in Han River and Ttukseom amusement park, the downstream region and collected samples equally at the Hongreung stream, Wangsuk stream, Cheonggye stream among streams flowing into Han River and then measured Melamine concentration after purification. As a result, melamine was not detected at the suburbs of Paldang Dam and it was detected at Ttukseom amusement park, the downstream of it, in the concentration of 0.312 μg/L. The Wangsuk stream with 0.578 μg/L highest Cheonggye stream and Hongreung stream was detected with each 0.197 μg/L and 0.325 μg/L. Although the concentration was low in general, melamine detection could be checked at most point. In 1970, the world capacity of Melamine was estimated at 200,000 ton, with current production estimated to be 1,400,000 ton. Melamine of Han River and rivers flowing into Han River is present at low concentration but pollution will increase in the future due to increase of use. Depending on the size of activated carbon in the experiment were slightly different. But the breakthrough model is almost identical.
IC-MS/MS를 이용한 수중의 과염소산이온 분석방법 최적화 및 한강수계내 분포조사
김현희(Hyun Hee Kim),한인섭(Ihn Sup Han),정관조(Gwan Jo Jeong),박현(Hyeon Park),한선희(Sun Hee Han),조완선(Wan Seon Cho) 大韓環境工學會 2010 대한환경공학회지 Vol.32 No.4
과염소산이온의 분석을 위해 전기전도도 검출기(CD; conductivity detector)를 연결한 이온크로마토그래피(IC; ion chromatography) 방법이 지금까지 가장 널리 사용되어 왔다. 그러나 이 방법은 시료의 조성에 영향을 받을 수 있고, 정량한계를 낮추는데 한계가 있다. 따라서, 본 연구에서는 미량의 과염소산이온 분석을 위해 이온크로마토그래피 질량분석법 (IC-MS/MS; ion chromatography mass spectrometry)을 제시하였다. IC-MS/MS를 이용한 과염소산이온의 분석방법을 적용한 결과 평균회수율 104.4±5.7%, 상대표준편차 1.9±1.3%를 얻었으며, 검출한계(MDL; method detection limit)는 0.0207±0.0099㎍/L를 얻을 수 있었다. IC-MS/MS를 한강수계 지류천과 본류에 적용시킨 결과, 최소 <0.1㎍/L에서 최고 18.30㎍/L 범위로 나타났다. 서울시 6개 아리수정수센터의 취수원수와 정수에서는 과염소산이온이 0.18~0.34㎍/L의 농도로 존재하는 것으로 나타났다. Ion chromatography (IC) coupled with conductivity detector (CD) is a common system for the determination of perchlorate in water samples. Although the IC method with CD has been widely used for the determination of trace level perchlorate ion in water, sensitivity decreases dramatically as the complexity of the matrices increases. Here we proposed the application of ion chromatography coupled with mass spectrometry (IC-MS/MS) to significantly improve selectivity of perchlorate. The mean recovery of the method was 104.4±5.7% and the relative standard deviation (RSD%) was 1.9±1.3%. The calculated method detection limit (MDL) was 0.0207±0.0099㎍/L. The concentrations of perchlorate were minimum <0.1㎍/L and maximum 18.3㎍/L in source water (Namhan, Bukhan and Han River). Hongreung showed higher concentrations (1st-14.3㎍/L, 2nd-18.3㎍/L) than the other places. And the concentrations of perchlorate were 0.18~0.34㎍/L in the samples taken from the six water treatment plants and six intake stations in Seoul.
수질오염총량관리 대상물질 확대를 위한 한강수계 하천수질 경향 및 수질특성 분석
최옥연 ( Ok Youn Choi ),김홍태 ( Hong Tae Kim ),서희승 ( Hee Seung Seo ),한인섭 ( Ihn Sup Han ) 한국물환경학회 2017 한국물환경학회지 Vol.33 No.1
Based on the existing pollutant emission standards which are armed at the pollutant concentration of each pollution source, the government formulated and implemented a new management system of total water-pollutant emission. By virtue of this new management system, pollution-loading amount of individual watershed could be controlled, which achieved the requirements of water-quality management, such as TP and BOD. In initiate stage of its implementation, BOD was selected as the object of water-quality management, since we need to consider the continuity of water-quality data and established pollutant-management laws and policy. During the ongoing management, TP management was added into the system, since BOD management alone was not enough. However, the frequency of algae bloom in Han river showed the same trend, even though TP was treated as additional control target. Therefore, this paper will analyze different water-quality parameters and characteristic of water quality, in order to serve as a reference for watershed management of water quality, by which the applicable management period and target pollutant can be selected in the future.