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한국환경분석학회> 환경분석과 독성보건> 대청호 유입 소하천 유기물질 유출 특성

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대청호 유입 소하천 유기물질 유출 특성

Characteristics of Organic Matters in Small Streams into the Daecheong Reservoir

김상욱 ( Sang-wook Kim ) , 조윤해 ( Yoon-hae Cho ) , 채민희 ( Min-hee Chae ) , 길기범 ( Gi-beom Kil ) , 석광설 ( Kwang-seol Seok )
  • : 한국환경분석학회
  • : 환경분석과 독성보건 23권3호
  • : 연속간행물
  • : 2020년 09월
  • : 155-164(10pages)
환경분석과 독성보건

DOI


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1. 서 론
2. 재료 및 방법
3. 결과 및 고찰
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While BOD5 has been improved in Korea's major rivers and reservoirs over the last 10 years, CODMn is still on the rise. The purpose of this study was to investigate the leakage characteristics of refractory organic oatter (ROM) in Juwon stream and Pumgok stream flowing into Daecheong Reservoir, the most important drinking water source of Geum River basin. ROM was extracted with hydrophilic (Hi) and hydrophobic (Ho) organics using the XAD resin method. XAD analysis showed that hydrophobic ratios were 52.1-77.1 % and 52.7-97.1 % of dissolved organic carbon (DOC), respectively, in the Juwon and Pumgok streams. Hydrophobic organic matters were classified as humic substances originating from forest areas upstream of the watershed. In addition, the Ho/Hi ratio increased during the rainfall period (seven-nine months) and decreased during the non-rain period, and the Ho component, including hydrophobic acid (HoA) during rainfall, was the main component flowing into Daecheong Reservoir through the runoff. Total organic carbon (TOC) and COD showed a strong positive correlation between organics to confirm the association between ROMs. The results of this study confirmed the characteristics and background concentrations of the ROMs of some tributaries into the Daecheong Reservoir. In the future, continuous investigation and research will be needed to manage the natural organic matter of the main stream of Geum-river, including Daecheong Reservoir.

UCI(KEPA)

I410-ECN-0102-2021-500-001343925

간행물정보

  • : 공학분야  > 환경공학
  • : KCI등재
  • :
  • : 계간
  • : 2672-0175
  • : 2672-1139
  • : 학술지
  • : 연속간행물
  • : 2019-2021
  • : 60


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KCI등재

1전국 연안어장 퇴적물 및 양식생물 중 브롬화난연제(HBCDDs 및 PBDEs) 분포 및 축적특성

저자 : 손지영 ( Ji-young Son ) , 성재현 ( Jae-hyun Seong ) , 임동훈 ( Dong-Hoon Im ) , 김상수 ( Sang-soo Kim ) , 이인석 ( In-seok Lee ) , 최민규 ( Minkyu Choi )

발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 24권 2호 발행 연도 : 2021 페이지 : pp. 41-50 (10 pages)

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Marine sediments and biota collected from farming areas of Korean coasts were studied to detect the concentrations of brominated flame retardants(BFRs), hexabromocyclododecane(HBCDD) and polybrominated diphenylethers(PBDEs), and to investigate on their distributions and accumulation patterns. The concentrations of HBCDDs in marine sediments and biota were 15-30 times higher than those of PBDEs. However, the concentrations of HBCDDs in marine sediments were not correlated with those of PBDEs(p > 0.05), and the ratio of HBCDDs to PBDEs in marine sediments were higher in farming areas. The major isomer of HBCDDs in marine sediments was γ-HBCDD(72% of the total HBCDDs), similar to those in technical mixtures(80%) and in expanded polystyrene buoy(70%) for aquaculture. In marine biota, α-HBCDD constituted the major percentage(53%) to the total HBCDDs detected. The major congeners of PBDEs were 183, 47, 99, and 153 in marine sediments and 47, 49, 99, and 154 in marine biota, associated with commercial penta- and octa-BDE mixtures. In this study, according to estimation of the biota-sediment accumulation factor, PBDEs showed a higher bioaccumulation potential compared to HBCDDs, and BDE-47 showed the highest bioaccumulation potential among BFRs.

KCI등재

2LC-HRMS를 이용한 송사리 내 의약품 농축 및 생체변환 연구

저자 : 차현전 ( Hyeonjeon Cha ) , 전준호 ( Junho Jeon )

발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 24권 2호 발행 연도 : 2021 페이지 : pp. 51-61 (11 pages)

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The occurrence of pharmaceuticals in the aquatic environment has been increasing steadily owing to the increasing use of pharmaceuticals in our daily life. This results in increasing challenges of environmental health risk as pharmaceuticals in the surface water can be accumulated and transformed in aquatic organisms. The purpose of this study was to predict the bioconcentration and biotransformation of several pharmaceuticals in Japanese medaka (Oryzias latipes) using a 96 h exposure test. Based on an investigation of the most frequently detected pharmaceuticals in the surface waters in South Korea, 11 target compounds were selected including atenolol, caffeine, carbamazepine, diclofenac, fluoxetine, irbesartan, losartan, mefenamic acid, metoprolol, naproxen, and venlafaxine. A bioconcentration factor of 1.9, 31.3, and 10.7 was expected in fish owing to the accumulation of carbamazepine, fluoxetine, and mefenamic acid, respectively. A total of 12 biotransformation products (BTPs) were tentatively identified via oxidation, hydroxylation, dealkylation, and demethylation reactions. In summary, it is expected that these BTPs represented by molecular structures derived from their parent compounds can be utilized to evaluate the change in toxicity of BTPs compared to that of the parent compounds.

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3탄산염 혹은 황화물 풍부 조건의 하수 처리 과정을 모사한 환경에서 산화아연 (ZnO) 나노입자의 구조 변환 연구

저자 : 이서연 ( Seoyeon Lee ) , 한준호 ( Junho Han ) , 노희명 ( Hee-Myong Ro )

발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 24권 2호 발행 연도 : 2021 페이지 : pp. 75-83 (9 pages)

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Development of nanotechnology has led to the extensive application of metal-oxide nanoparticles (NPs) in industry, and it cause toxicity and a risk to ecosystems and human health through unidentified pathways. Zinc oxide (ZnO) is one of the most versatile NPs, which causes severe direct and indirect toxicity upon transformation by environmental fluctuations. In this study, the transformation of ZnO NPs was examined in artificial sewage, wherein the sewage treatment process was simulated using either carbonate or sulfide, under oxic and anoxic conditions. Dynamic light scattering, transmission electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) were employed to identify the morphology and structure of the NPs. The results indicate that a decreasing in pH and ionic strength causes the aggregation of ZnO NPs, and the carbonate-rich condition leads to the growth of a spherical crystal into a rectangle form, without changing the crystal structure. XRD and XPS analysis revealed that ZnO NPs transform into the smaller ZnS NPs, sphalerite, under sulfide-rich and anoxic conditions. This implies that sewage treatment would cause the transformation of ZnO NPs into ZnS NPs, which have higher colloidal stability and dissolution rate; therefore, the transformation of NPs should be carefully examined and assessed for a better understanding and safe application.

KCI등재

4수막재배시설 실내공기 중 라돈 농도 특성에 관한 연구

저자 : 김상철 ( Sang-cheol Kim ) , 박찬주 ( Chan-ju Park ) , 최재혁 ( Jae-hyuk Choi ) , 서민아 ( Min-a Seo ) , 엄진균 ( Jin-gyun Eom ) , 박미선 ( Mi-sun Park )

발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 24권 2호 발행 연도 : 2021 페이지 : pp. 84-90 (7 pages)

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The aim of this study was to investigate indoor radon concentration in the water curtain cultivation facilities located in the rural area of Sejong city during the winter season. The bedrock of the southern part of the city is mainly composed of granite rocks, which have been reported to retain higher radon content than sedimentary and metamorphic rocks. The measured indoor radon concentrations were very high in all the facilities partially exceeding the recommended values provided in the 「Indoor Air Quality Control Act」 guidelines. Furthermore, we observed that operation of equipment to maintain stable indoor temperatures resulted in diurnal variations in radon concentration. Based on the results, we concluded that suitable measures such as changing the time at which work starts or ventilating in advance could help reduce the duration of exposure to radon.

KCI등재

5Delay Column과 On-line SPE LC-MS/MS 시스템을 이용한 수중에 과불화화합물의 분석

저자 : 한개희 ( Gaehee Han ) , 강현우 ( Hyunwoo Kang ) , 박정자 ( Jeongja Park ) , 이선희 ( Seonhui Lee )

발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 24권 2호 발행 연도 : 2021 페이지 : pp. 91-99 (9 pages)

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To ensure the safety of the citizens of Daegu with respect to drinking water sources, we continuously monitored trace pollutants in the Nakdong River basin. Perfluorinated compounds (PFCs) had been detected in the Nakdong River previously; thus, further low-concentration detection is required. We developed an LC-MS/MS analysis method using the online SPE approach for fast and simple detection of low-concentration PFCs. In this process, a delay column was used to assess PFC contamination. As a result, quality control analysis of eight standard PFCs using this method showed strong correlations, with correlation coefficients of 0.991 and more, and the limit of quantification was 0.5 to 1.7 ng/L. The recovery rates of PFCs from samples ranged from 75.3% ± 1.23% to 118.0% ± 1.39%, suggesting robustness of this method. Analyses of PFC at seven sampling points in the Nakdong River basin showed high PFC concentrations at the point where effluent from a sewage treatment plant was introduced. PFHxS, PFOA, and PFOS values, which were used as drinking water monitoring standards of treated water at the Daegu advanced water treatment plant, did not exceed the monitoring standards. Therefore, these results demonstrate that the established method is appropriate as an analytical tool for assessing low-concentration PFCs in drinking water.

KCI등재

6디누더(Denuder)장착 여부에 따른 초미세먼지(PM2.5) 중 암모늄 과대 평가와 이온 밸런스에 관한 연구

저자 : 엄정훈 ( Jung-Hoon Uhm ) , 박세영 ( Se-young Park ) , 권승미 ( Seung-Mi Kwon ) , 신진호 ( Jin-ho Shin ) , 조석주 ( Seog-Ju Cho ) , 김현욱 ( Hyunook Kim )

발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 24권 2호 발행 연도 : 2021 페이지 : pp. 100-106 (7 pages)

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When collecting air samples for analyzing the ionic components of fine dust, a (+) error may occur because gaseous precursors react with each other on the filter surface to form particles. To remove NO2, SO2, HNO3, HNO2, and NH3, which may cause these errors, a denuder must be installed in front of the sampling port. However, with the extensive use of sequential samplers that automatically replaces filters once every 24 h, the use of denuders is decreasing. In this study, the effect of denuder installation was analyzed by operating a sampler simultaneously with and without a denuder on 279 samples collected from Gwangjin, Seoul. It was confirmed that the NH4+ concentration of the sampler equipped with a denuder was 13.4%~26.9% less than that of the sampler without the denuder when the fine particle concentration was less than 30 μg/㎥. Further, less nitrate and sulfate were detected when the denuder was installed. However, their levels were not as low as that of NH4+. This is likely because nitrate and sulfate are collected in a form bound to water soluble organic carbon particles and then eluted to add anions to lower the ion balance. In addition, when the denuder was not installed, the ion balance value was higher than that with the denuder installed, which was attributed to the partial neutralization of negative ions by gaseous ammonia. Therefore, to determine whether an error occurs during the experiment, the ion balance should be carefully maintained.

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1GC-ECD를 이용한 서울시 도시하천 퇴적물 중 PCBs의 정량과비용효과적인 Dioxin-like PCBs의 추정

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In this study, the concentration of polychlorinated biphenyls (PCBs) remaining in the sediment of Han River and its 4 tributaries was investigated in a cost-effective method using gas chromatography-electron capture detector (GC-ECD). The concentration of total PCBs was calculated by summing up the individual Aroclor concentration quantified using specific congeners of each Aroclor. By quantifying individual Aroclors, the concentration of dioxin-like PCBs (dl-PCBs) and toxicity equivalency quotient (TEQ) for sediment samples could be estimated using simple formulae derived from the information of dl-PCBs content in individual Aroclors. Although it was not possible to compare the estimated concentration of dl-PCBs with the concentration analyzed by high-resolution mass spectrometry (HRMS) for the same sample, acceptable results were obtained through comparison with the concentration of sediment samples at adjacent points in previous studies. As a result, PCB concentration remaining in the sediments in the urban stream was relatively high in the sediments near the industrial area. In the case of the two tributaries adjacent to the industrial area, the concentrations of PCBs in most sediment samples exceeded the effective range low (ERL) value and at certain points exceeded the effective range median (ERM) value. In addition, most high concentrations of PCBs were commonly detected at the junction of the river and its tributary where the flow rate slowed noticeably. Therefore, it is necessary to consider the junction of rivers as an important sampling point when investigating PCBs in sediments.

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3대청호 유입 소하천 유기물질 유출 특성

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발행기관 : 한국환경분석학회 간행물 : 환경분석과 독성보건 23권 3호 발행 연도 : 2020 페이지 : pp. 155-164 (10 pages)

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