• 분석과학
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• 제17권4호
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• pp.347-354
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• 2004

본 연구에서는 낙동강과 그 유역에 서식하는 붕어와 황소개구리 체내의 polychlorinated biphenyls (PCBs)의 축적도와 분포특성을 조사하였다. 낙동강의 구미부터 하구언까지 모두 5개 지점에서 붕어와 황소개구리를 채집하였으며, 이들의 근육 부분을 최종 분석시료로 하였다. PCBs의 정량분석은 GC-MSD 시스템으로 처리하였으며, PCBs 총농도를 대변할 수 있는 62개 congener를 분석항목으로 선정하였다. 붕어에서는 모두 24개의 congener가 검출되었고 총 PCBs 농도는 0.74~5.41 ng/g wet weight 범위로 나타났다. 황소개구리에서는 낙동강 하구언 1개 지점에서 단지 2개의 congener가 검출되었고 그 농도도 0.24 ng/g wet weight로서 붕어보다 약 22배 정도 낮게 검출되었다. 전체적으로, PCB 153이 가장 높게 검출된 congener이고, penta- 및 hexa-CBs가 총 PCBs의 78%를 차지하였다.

• 한국대기환경학회지
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• 제24권2호
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• pp.249-258
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• 2008

Historical emission data for 11 polychlorinated biphenyls (PCBs) and a regional multimedia environmental model, CoZMo-POP 2, were used to predict air concentrations and congener patterns in Korea. The total emission value for South Korea was allocated to sub-provinces and cities based on their population. The spatial distribution of PCB emissions was generally correlated with that of measured atmospheric levels, suggesting that population could be a good surrogate for the intensity of PCB emission in Korea. The simulated time trends of air concentrations well reflected those of emission with a peak in the mid-1970s and insignificant levels in the 2030s. The model predicted that the contribution of volatile PCBs had increased after emission reduction iii the 1970s. This trend would continue until the early 2030s. The measured and modeled PCB levels in the 2000s were in an agreement of an order of magnitude, and their congener patterns were very similar. Consequently, despite of high uncertainty for emission estimates, the emission data for Korea used in this study is considered to be reliable. The results of this study could be compared with simulation data based on a new emission inventory to be developed by measurements in the near future.

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2008년도 제49회 학술심포지움 및 국제학술대회
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• pp.96.1-96.1
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• 2008

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2008년도 제49회 학술심포지움 및 국제학술대회
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• pp.94.2-94.2
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• 2008

• Environmental Sciences Bulletin of The Korean Environmental Sciences Society
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• 제10권S_3호
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• pp.107-111
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• 2001

Surface seawater was sampled from 20 stations in Youngil Bay, Korea in November 2000. The samples were analyzed for eight chlorobenzenes(CBs) out of a total of 12 in the congener series using a gas chromatography coupled to a mass spectrometer detector(GC/MSD). The total CB levels varied from 1.3 to 6.1 ng/L with a mean of 4.0 ng/L. Trichlorobenzene groups (sum of 1,3,5-, 1,2,4-, and 1,2,3-trichlorobenzene) were the predominant class among the four congener groups, while tetrachlorobenzenes(sum of 1,2,3,5-, 1,2,4,5-, and 1,2,3,4- tetrachlorobenzene) and pentachlorobenzene showed a low presence. The total CB levels exhibited similar patterns for all the stations. A significant positive correlation was observed between the individual CB compounds in the particulate samples, while the dissolved samples revealed a strong correlation between the heavier molecular weight CBs.

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2001년도 추계심포지움 및 학술발표회:환경오염의 생체지표를 이용한 위해성 평가의 최근 기법
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• pp.88-88
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• 2001

• 한국토양비료학회지
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• 제44권4호
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• pp.662-666
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• 2011

In this study, distribution characteristics of dioxins in soils in Busan, Korea were investigated regarding different land use types. Soil sampling sites that distributed through the Busan city showed dioxin concentration ranging from 0.489 to $322.736pg-TEQ\;g^{-1}$ dry weight with a mean value of $26.257pg-TEQ\;g^{-1}$ dry weight. The mean dioxin concentrations of investigated soils ranged from 1.554 to $50.357pg-TEQ\;g^{-1}$ dry weight in consideration of each land use type. That in metal refinery sites with $50.357pg-TEQ\;g^{-1}$ dry weight was higher than any other sites, followed by waste incinerator sites with $44.285pg-TEQ\;g^{-1}$ dry weight. The majority of soil samples had the same dioxin congener profiling despite the different range of dioxin concentration. Octa-CDD was the major contributor among seventeen dioxin congeners with the range from 29.5 to 70.1% in real values. In contrast to real values, dioxin congener profiles in TEQ values were dominated by 2,3,4,7,8-PeCDF which contributed about 35.3~43.8% to the total dioxin concentrations. It was judged by these results that penta-CDF was the major contributor of soil samples in Busan city. The mean ratio of PCDFs/PCDDs in real values was about 0.71, but that in TEQ values was, in contrast to it, approximately 3.03.

• 한국환경보건학회지
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• 제37권6호
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• pp.440-449
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• 2011

Objectives: This study was designed to determine the levels of polybrominated diphenyl ethers (PBDEs) in breast milk and to evaluate the relations with factors affecting these levels. Methods: The congener levels of PBDE in 22 samples of breast milk were analyzed using a high resolution gas chromatograph with a high resolution mass detector. In accordance with our standard operating procedures, the recoveries of internal standards had to range between 68% and 118%. Since the distribution of PBDE concentrations is close to log-normal, the data were logarithmically transformed before analysis. Test subjects were healthy primipara and multipara mothers with a mean age of 32 (SD = 2.7) in 2006. Results: Seven PBDE congeners (BDE-28, 47, 99, 100, 153, 154, and 183) were detected and identified in all of the pooled breast milk samples, indicating widespread contamination from PBDEs in the environment in Korea. Residue levels of total PBDEs (sum PBDEs from tri- to hepta-BDE) ranged from 0.84-13.1 ng/g lipid with median and geometric mean levels of 2.6 ng/g lipid and 2.74 ng/g lipid, respectively. PBDE congeners 47, 99 and 153 markedly predominated and accounted for about 75% of the amount of the PBDE congeners analyzed. BDE-47 was the dominant congener in most samples, whereas BDE-153 was predominant in a few (n = 7/22). BDE-47 was highly correlated with total PBDEs (r = 0.987, p < 0.01). In analyses of the differences of the means of log transformed breast milk PBDE levels for groups of potential covariates, only breast milk BDE-47 and BDE-99 levels were significantly associated with fish (p < 0.05) and meat consumption (p < 0.01). However, we did not find significant correlations between PBDE levels and maternal age, body mass index (BMI), parity, job presence and smoking status. Conclusions: Our findings are mainly limited due to the small sampling size and low doses of PBDEs exposure. Background and human exposure data of PBDEs is lacking, and longitudinal investigations into the environment and biota are encouraged to determine the health impact on future populations in Korea.

• 분석과학
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• 제18권3호
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• pp.232-240
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• 2005

절연유 중 PCBs 총 농도를 GC/ECD와 HRGC/HRMS를 이용하여 정량한 결과 각각 N.D. ${\sim}154.04{\mu}g/g$과 $0.087{\sim}223.6{\mu}g/g$(TEQ 농도는 0.00067~6.8 ng WHO-TEQ/g)으로 검출되었으며, 6개의 시료에서 2 ppm을 초과하였다. 고농도 시료일수록 정량방법의 차이로 인해 ECD와 HRMS의 분석결과가 차이를 나타내었다. 절연유 중 PCBs의 피크패턴 및 군집분석을 사용하여 시료에 함유된 PCBs 제품형태를 추정할 수 있었으며, Aroclor 1248 제품은 함유되어 있지 않았다. Co-PCBs 이성체 분포에 있어서 non-ortho 치환 이성체에 비해 mono-ortho 치환 이성체가 높은 비율을 나타내었으며, PCB-167 이성체가 가장 높은 비율을 차지하였다. 또한 절연유 중 Co-PCBs의 이성체패턴은 소각로 배출가스, 환경 대기시료 뿐만 아니라 PCBs 제품(Aroclor, Kanechlor)과도 다른 이성체 패턴을 나타내었다.

• Journal of Species Research
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• 제12권1호
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• pp.48-54
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• 2023

Foraminifera are unicellular eukaryotes widely distributed in marine and transitional marine environments. They play important roles in marine food webs and geochemical cycles and have physiological properties like the formation of calcareous tests and nitrogen respiration. Research on species diversity, distribution and endemism are essential in biogeography and biodiversity conservation. Here, we report three unrecorded species of foraminifera (Hemirotalia foraminulosa, Planispirillina denticulogranulata and Oolina brevisolenia) collected from Jeju Island and the South Sea (Korea). Planispirillina denticulogranulata is the second Planispirillina species recorded in Korea, which can be distinguished from congeners by its tubercles on the ventral side and grooves on the spiral suture. Hemirotalia foraminulosa is differentiated from the only congener H. calvifacta by multiple-scattered pits on the umbilicus, and it is the first report of Hemirotalia from Korean water. Oolina brevisolenia has specific bifurcating costae that characterize it from other congeners. This study contributes to documentation of the foraminiferal biodiversity in Korea, moreover, provides an essential basis for the expanded studies on modern foraminifera.