• Proceedings of the Korean Environmental Sciences Society Conference
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• 1998.10a
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• pp.188-190
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• 1998

• Journal of Environmental Health Sciences
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• v.32 no.1 s.88
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• pp.46-52
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• 2006

Results for the concentrations of total polychlorinated biphenyls (total PCBs) and the PCB profile with different types of leaves from four coniferous trees (pine needles) at the same sampling site are presented. Concentrations of total PCBs detected in pine needles were very similar among them regardless of their different types of leaves, which means a possibility for bio-monitoring regional contamination of PCBs. Correlation coefficients(r) of PCB congeners between pine needles were very significant (r>0.97, p<0.001), which showed that PCB congener's patterns of each pine needle were similar. Profiles of PCBs detected in pine needles showed correlation with gaseous phase PCBs in air, otherwise not with particle phase PCBs in air. Therefore, it was estimated that dry gaseous deposition was a principal pathway of PCBs accumulation in pine needles. In addition, although we analyse a different types of leaves in pine needles at the same region, they can be used to identify regional contamination patterns of PCBs for larger regions.

• Journal of environmental and Sanitary engineering
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• v.21 no.1 s.59
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• pp.1-11
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• 2006

This study was to investigate concentration characteristics of atmospheric PCBs in soil sample and pine needle at rural area. Profiles of PCB congener detected in pine needle and soil sample have a difference that low molecular PCBs mainly existed in pine needle, whereas high molecular PCBs were mainly existed in soil sample because of their different vapor pressure and octanol-air partitioning coefficient($K_{OA}$) of each congeners. Correlation coefficients(r) of PCB congeners simultaneously detected in soil and pine needle were significant (r>0.71, p<0.01), which showed that PCB congeners patterns of atmosphere could be estimated in using pine needle and soil sample indirectly. The contributions(%) of higher molecular PCBs(>penta-CB) to total PCBs in soil sample were higher than those of pine needle and the contribution of lower molecular PCBs(

• Analytical Science and Technology
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• v.15 no.3
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• pp.287-299
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• 2002

The residue levels of total PCBs in the surface samples were detected low concentration compared to the coastal area in Korea, and the PCBs pattern were very similarly to the arochlor mixture(1016+1232+1248+1260). The selected area divided into three area(Kanghwa:A, Yellow:B and Jangdo:C) by depending on the chlorine ratio. The PCBs were mainly detected dichlorinated and trichlorinated biphenyls in far sea, and heptachlorinated and octachlorinated biphenyls in the near the Incheon coastal area. The residue levels of PCBs were detected 0.72${\sim}$9.20 ng/g in the surface samples, 1.60~3.00 ng/g for Kanghwa and 0.34~9.20 ng/g for Jangdo in the core samples, and the PCBs concentration increased from bottom to top.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2001.05a
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• pp.107-108
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• 2001

본 연구에서는 부산, 경남 주민의 중요한 식수원인 낙동강에 큰 영향을 미치고 있는 금호강을 대상으로 하여 난분해성 물질이며 내분비계 장애물질인 PCBs의 분포 상태를 조사하였다. 금호강 저니토에서의 PCBs 분석은 용매 추출법을 사용하였고 실리카 겔과 플로리실 칼럼을 통과시켜 정제한 다음 GC-ECD로 분석하였다. 모든 조사 지점에서 26개 congener가 고루 검출되어 있는 것으로 보아 금호강으로 유입되었던 PCBs의 종류는 다양했던 것으로 추정되고 금호강 유역의 저니토에 축적되어 있는 PCBs가 낙동강 하류로 유입될 수 있을 것으로 판단된다.

• Journal of Korean Society for Atmospheric Environment
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• v.23 no.6
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• pp.734-743
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• 2007

Polyurethane foam-disk passive air samplers (PAS) were deployed in a southern area of Korea for three months. The target compounds were 12 coplanar polychlorinated biphenyls (PCBs). The congener profiles measured in this study were the same as those in ambient air and emission gas from the incinerator. A gradient of the total PCBs in different regions (industrial>residential>rural) was observed, suggesting the industrial complex may be an important source of coplanar PCBs. In general, only gas-phase compounds are mainly sequestrated by PAS. In order to estimate the concentration of particle-phase PCBs, a gas/particle partition model was used. A combined result (gas+particle-phase PCBs) was compared with previous results, indicating that the level of coplanar PCBs in our study area is comparable to those in other urban sites in the world. The validation of this method for estimating the total concentration is required through additional backup studies.

• Analytical Science and Technology
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• v.18 no.3
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• pp.232-240
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• 2005

The total PCBs level in the transformer insulation oil samples using GC/ECD and HRGC/HRMS were ranged from 0.087 to $223.6{\mu}g/g$ and ranged from N.D. to $154.04{\mu}g/g$, respectively. The calculated TEQ values were ranged from 0.00067 to 6.8 ng WHO-TEQ/g. Among the samples, 6 samples showed higher than 2 ppm concentration (specific waste criterion of Korea). A variety in the concentration of total PCBs were observed between ECD and HRMS analysis. This is maybe due to quantification mehtod. The Aroclor 1248 wasn't present in the samples. The distribution pattern of Co-PCB congeners showed that the ratio of monoortho substituted congeners were higher than non-ortho substituted congeners. Among that, PCB-167 congener was predominant. In addition, the distribution of Co-PCBs congeners was different with that of flue gas and ambient air samples as well as commercial PCB formulations (Aroclor, Kanechlor).

• Ocean and Polar Research
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• v.32 no.3
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• pp.237-245
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• 2010

Bioaccumulation of polychlorinated biphenyls (PCBs) and organochlorine pesticides was studied in sediment dwelling bivalves, Manila clams (Ruditapes philippinarum), collected from the midwestern coast of Korea. As witnessed by the dominance of tetra- to penta-chlorinated congeners in sediments and the penta- to hexa-chlorinated congener dominance in clams, the profile of PCBs in the sediments and Manila clams differed. Lipid and organic carbon-normalized biota-sediment accumulation factors (BSAFs) were determined for organochlorine pesticides. BSAFs of $\beta$-hexachlorocyclohexane ($\beta$-HCH) and $\Sigma$DDTs were in the range of 0.06~1.36 and 0.31~1.06. No clear relationships were found between BSAFs of $\Sigma$DDTs in Manila clams and the concentrations of DDTs in the associated sediment. The accumulated PCBs and organochlorine pesticides were compared in Manila clams and oysters (Crassostrea gigas) collected from 3 sites. Highly chlorinated PCBs were more commonly found in oyster tissues than in clam tissues. The reasons for the different accumulation pattern of organic pollutants in the two organisms are discussed.

• Analytical Science and Technology
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• v.21 no.3
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• pp.201-211
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• 2008

The treatment efficiency of PCBs containing wastes has been investigated. The samples treated by electron beam and de-chlorination method were analyzed to verify the byproducts before treatment and after treatment. In the treated samples by electron beam irradiation, PCBs were not detected by comparing the peak matching using the Korean official waste test method. On the other hand, PCBs congeners were detected by analyzing individual isotope method using HRGC/HRMS. Most of PCB congeners in waste were decomposed to 3-chlorobiphenyls, lower chlorinated congener produced during the treatment of electron beam. In the chemical dechlorination treatment, it was found that the concentrations of PCBs in treated samples were lower than those of regulation criteria in Waste & POPs management law and the after treatment concentration were satisfied to the regulation criteria. Also, dioxins were not observed after the physio-chemical treatment processes of PCBs containing wastes.

• Analytical Science and Technology
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• v.18 no.6
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• pp.529-534
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• 2005

We collected seven species of shellfish; all originating from the southern coastal areas of Korea, from a market every three months from Dec. 2001 to Sept. 2002, and determined the total polychlorinated biphenyl(PCB) levels by the sum of 26 individual congener levels. A GC-ECD system was applied for identification and quantification of these PCB congeners. Mussel showed the highest level in Sept. 2002 at 34.5 ng/g dry weight(d.w.). All species except mussel showed the lowest total PCB level in Dec. 2001 and their levels in tissue ranged from 0.6 to 5.5 ng/g d.w. The total PCB levels ranged from 0.8 to 17.3 ng/g in Mar. 2002, 2.2 to 9.5 ng/g in June 2002, and 1.8 to 34.5 ng/g d.w. in Sept. 2002. The principal congener group was penta-CBs, which accounted for 32% of the total PCBs, followed by hexa-CBs at 23%, and tetra-CBs at 21%.