• Title, Summary, Keyword: PCBs

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Biodegradation of PCBs into Contaminated Dredged Sediments (오염퇴적물에 함유된 PCBs의 생물분해 특성)

  • 안재환;김소정;지재성;배우근;황병기
    • Journal of Soil and Groundwater Environment
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    • v.9 no.2
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    • pp.41-47
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    • 2004
  • This research in the degradation of polychlorinated biphenyls(PCB) has focussed on the use of experimental enrichment cultures to obtain PCB-deading communities and identification of PCB-degrading bacteria accor야ng to pure culture. During 180 days, enrichment culture was performed to obtain PCB-degrading bacteria and initial concentration was injected 1.6 ppm,0.7 ppm, respectively. After 180 days of enrichment culture, PCBs was removed 80-87% and 57-71%. Biodegradation of PCBs was studied according to dominated PCB-degrading bacteria. Biodegraddation of PCBs was 80% in initial concentration of PCBs for 20days, enrichment cultured PCB-degrading bacteria was isolated by pure culture and it was verified to Pseudoxanthomonas sp.

Polychlorinated Biphenyl Contaminations of Water, Soils and Sediments Sampled from Various Places of Korea (국내의 다양한 장소에서 채취된 수질, 토양 및 저질시료의 폴리염화비페닐에 의한 오염도)

  • Park, Hyun-Mee;Ryu, Jae-Chun;Kim, Young-Man;Lee, Kang-Bong
    • Analytical Science and Technology
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    • v.13 no.6
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    • pp.802-809
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    • 2000
  • Concentrations of polychlorinated biphenyl congeners (PCBs) in samples collected from 43 kindss of water, 35 kinds of soil and 11 kinds of sediment in various place of Korea have been monitored using GC/MS/SIM analytical method. In our investigation, mean recoveries were $83.8{\pm}10.4%$ for water, $94.9{\pm}12.2%$ for soil and sediment samples and $80.2{\pm}8.7%$ for the spiked $^{13}C{_{12}}$-PCBs. Detection limits of PCBs for water, soil and sediment samples are 0.01 ng/ml and 0.05 ng/g. PCB congeners in water samples were not detected within quantitation limit, but trace amounts were detected in most of soil and sediment samples. The contamination level of PCBs in Korea was evaluated to be lower than in advanced countries like USA, Europe and Japan.

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Distribution of Organochlorines and PCB Congeners in Korean Adipose Tissue, Liver and Whole Blood (한국인 지방, 간장 및 혈액 중 유기염소제류 및 PCB congeners의 분포)

  • 유영찬;이상기;김기욱;이수연;양자열;김윤신;오승민;정규혁
    • YAKHAK HOEJI
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    • v.46 no.4
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    • pp.247-257
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    • 2002
  • Persistent organochlorine pesticides and polychlorinated biphenyls (PCBs) have been used intensively in agriculture or industry for a long time. The occurrence of organochlorine pesticides and PCBs in the environment and subsequently in parts of the food chain, resulting in the intake of these compounds by man and animal. The measure of the levels of organochlorine pesticides and PCBs in tissues or blood of human populations are good markers in determining the extent of exposure and in the evaluating the hazards. So, most countriess have conducted initial monitoring programs to determine organochlorine pesticides and PCBs in human tissues. But a few report has been presented in Korea. In this study, $\alpha$-BHC, $\beta$-BHC, ${\gamma}$-BHC, $\delta$-BHC, p,p'-DDT, p,p'-DDD, p,p'-DDE, endrin, dieldein, aldrin and 7 marker PCBs (28, 52, 101, 118, 138, 153, 180) were determined in human blood, adipose tissue and liver tissues collected at autopsy of 10 men and 10 women, 13-79 year of age. Significant differences in the levels of organochlorine pesticides and PCBs between districts where they had lived were found in the following chemicals: total PCB in the blood : $\beta$-BHC, total BHC, p,p'-DDE and total DDT in the adipose tissue : p,p'-DDE, total DDT and PCB 118 in the liver. No significant difference was found in the levels of organochlorine pesticides and PCBs between sexes and ages. Though the levels of organochlorine pesticides and PCBs were relatively lower than that of other countries, we could know that organochlorine pesticides and PCBs have been widely distributed in Korean human body.

A Comparative Study on Adsorption Characteristics of PCBs in Transformer Oil Using Various Adsorbents (여러 흡착제를 이용한 변압기 오일 중의 PCBs 흡착특성에 관한 비교연구)

  • Ryoo, Keon Sang;Hong, Yong Pyo;Ahn, Chun Ju
    • Journal of the Korean Chemical Society
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    • v.56 no.6
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    • pp.692-699
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    • 2012
  • The aim of the present study is to explore the possibility of utilizing loess and fly ash as well as activated carbon for the adsorptive removal of PCBs in transformer oil. Here, we investigated the effect of various factors such as temperature (5, 25, 55), contact time (30 min-3 day) and adsorbent does (1, 2.5, 5, 10 g) in detail. It was found that PCBs adsorption rate from transformer oil by activated carbon is more favored than loess at the equilibrium time of 60 minutes. The equilibrium data for both activated carbon and loess is fitted well to the Freundlich isotherm model. The rate constant and activation energy of PCBs adsorption in transformer oil on each adsorbent was analyzed by fitting a kinetic model at 5, 25 and $55^{\circ}C$. From the thermodynamic parameters, the PCBs adsorption process for transformer oil/activated carbon and loess system is spontaneous and endothermic in nature.

Comparison the quantification method of PCBs in waste transformer oils (절연유 중 폴리염화비페닐류의 정량법 비교)

  • Kim, Kyeo-Keun
    • Analytical Science and Technology
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    • v.18 no.3
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    • pp.206-215
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    • 2005
  • Polychlorinated biphenyls (PCBs) were commercially produced as complex mixtures beginning in 1929. The PCBs manufactured commercially are known by a variety of trade names including; Aroclor (USA), Phenoclor (France), Kaneclor (Japan), Sovol (USSR) and so on. PCBs are a class of 209 congeners that were widely used in a wide variety of applications, including dielectric fluid in transformers and large capacitors; heat transfer fluids; hydraulic fluids; lubricating and cutting oils; and as additives in pesticides, paints, adhesives, sealants, and plastics. The quantification methods of peak matching and coefficient comparison were compared using the Aroclor 1242, 1248, 1254, 1260 standards. Also, six transformer oils were analyzed as a main source of polychlorinated biphenyls (PCBs) emission into the environment. The transformer oils contained the pure and mixed of Aroclor 1242, Aroclor 1254, and Aroclor 1260. The analytical results using two quantification methods showed the little difference between the measured results.

PCBs concentration patterns in Korean and Canadan cheese (한국과 캐나다산 치즈중 PCBs의 농도 특성)

  • Chun, Man-Young;Kim, Tea-Wook;Ikonomou, Michael G.
    • Korean Journal of Environmental Agriculture
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    • v.24 no.2
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    • pp.139-145
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    • 2005
  • All 209 PCB congeners were analyzed in cheese produced in Korea and Canada. 5 Korean and 10 Canadian cheeses were purchased in supermarket in their native countries. 93 PCB congeners were found in Korean cheese; 83 congeners were detected in Canadian cheese. Total PCB concentrations were 299.81 and 200.96 pg/g w.w. in Korean and Canadian cheeses respectively; PCB concentration was 1.5 times higher in Korean than Canadian cheese. Korean TEQ concentration (0.0067 pg-TEQ/g w.w.) in cheese was similar to in Canadian cheese (0.0064 pg-TEQ/g w.w.). These PCB concentrations range was low level compared with that of other cheeses globally. The correlation coefficient $(R^2)$ of regression was high (0.752) between each PCB congener concentration in both Korean and Canadian cheese.

Concentration Distribution of Polychlorinated Biphenyls in Otter Scats from Active Construction Sites of the Busan New Port (부산신항만 공사 진행에 따른 수달 배설물 내 폴리클로로비페닐(PCBs)의 농도 분포)

  • We, Sung-Ug;Lee, Da-Hee;Cha, Hyeon-Gi;Yoon, Myung-Hee
    • Journal of The Korea Society For Environmental Analysis
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    • v.20 no.4
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    • pp.291-297
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    • 2017
  • This study was conducted to investigate the contamination status and distribution of the isomers of polychlorinated biphenyls (PCBs) in otter (Lutra lutra) scats collected from 17 localities in 3 regions (I-III) near the Busan New Port from 2003 to 2014. Detectable levels of ${\Sigma}PCBs$ were found in all the samples. The mean concentration of ${\Sigma}PCBs$ ranged from 3.40 to 50.4 ng/g in three of the study regions. The levels of ${\Sigma}PCBs$ in the three regions were compared. A relatively high level of ${\Sigma}PCBs$ was detected in region I, where the construction works were the most active. However, this had no statistical significance. Congener profiles showed that PCB-153 (mean contribution=28%) was predominant, followed by PCB-138 (24%), PCB-118 (17%), PCB-180 (11%), and PCB-52 (5%). High levels of PCB-153 and PCB-138, which are usually found at high levels in fish, in the otter scats suggest that the PCBs might have originated from fish, which are the primary source of food for otters. The results obtained suggest that otters ingest PCBs when they consume contaminated fish in coastal areas with active construction works.

Preliminary Estimation of National Emission Inventory for the Unintentionally Produced Polychlorinated Biphenyls (국내 부산물 다염화비페닐(PCBs) 배출량 예비 평가)

  • Kim Kyoung-Mi;Cho Kyu-Tak;Lee Jee-Yoon;Lee Jee-Eun;Lee Dong-Soo
    • Environmental Analysis Health and Toxicology
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    • v.19 no.2
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    • pp.227-233
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    • 2004
  • The main objectives of this study were to identify from literature review the potential sources and to provide a preliminary national emission inventory for the unintentionally produced polychlorinated biphenyls (PCBs) (i.e., by - product PCBs). In Korea, fuel combustion, waste combustion, thermal industrial processes, and transportation were identified as potential sources of by -product PCB s. According to the availability of the emission factors and/or activity data, emission inventory could be assessed only for fuel combustion, waste combustion, steel industry, non-ferrous industry, and non-metallurgical industry. The total national emission of by-product PCBs was estimated to be 1087kg for the year 2000. The preliminary estimation further indicated that the steel manufacturing was the single dominant emission category, contributing 93% to the total emission. Of the steel manufacturing processes, the contribution of the electric arc furnace was about 80% of the total emission. Due to high uncertainty associated with both the emission factors and activity statistics, the emission estimates in this study are likely to contain significant errors. However, the results of the present work could serve the first step toward future efforts to establish national source and emission inventories of by-product PCBs.

The Effects of Physico-chemical Properties of soils on PCBs Analysis (토양의 이화학적 특성이 PCBs 분석에 미치는 영향)

  • Kim, Tae-Seung;Shin, Sun-Kyoung;Chang, Jun-Young
    • Analytical Science and Technology
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    • v.16 no.1
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    • pp.48-58
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    • 2003
  • The effects of physico-chemical properties of soils on PCBs analysis in Korea was studied Three kinds of extraction solvents(toluene, acetone:hexane, dichloromethane) was selected to apply three different soils. The silicagel, florisil and alumina column cleanup also performed to compare the elution patterns, and three different methods (EPA, Japan, Proposed method in this study) of 62 PCBs also compared the individual peaks recoveries. The solvent average recovery was surveyed the order of toluene, acetone:hexane, dichloromethane as 77.94%, 58.59%, 54.20% for soil A, 53.65%, 80.32%, 68.27% for soil B and 44.52%, 60.35%, 56.36% for soil C, respectively. The average recovery was depended on the soil characters. The highest recoveries of each soil were obtained the toluene for soil A, acetone:hexane for soil B and C. However, the coplanar PCBs was obtained the highest recovery with dichloromethane. Thus, to select the solvent for the analysis of PCBs in solid, the selected compounds have to consider to get good result. The silicagel, florisil, alumina I and alumina II column cleanup process were surveyed the range of 38.73%~98.26%, and the higher chlorinated compounds was obtained the lower recovery compared to the low chlorinated compounds, generally. This results are also consistent with the coplanar PCBs isomers. The compared results of three different countries were obtained the 37.15% for USA, 45.92% for Japan and 44.46% for proposed method in this study.

Evaluation of human exposure to polychlorinated biphenyls using human serum by congener-specific analysis (혈액 중 PCBs 이성질체별 분석에 의한 인체 노출 평가)

  • Park, Hyo-Keun;Lee, Se-Jin;Jin, Guang-Zhu;Kang, Jung-Ho;Baek, Song-E;Chang, Yoon-Seok
    • Analytical Science and Technology
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    • v.19 no.1
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    • pp.73-85
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    • 2006
  • Blood serum concentrations of polychlorinated biphenyls (PCBs) were measured in employees who worked at a municipal solid waste incinerator (MSWI), members of residential community who lived near the MSWI (<0.3km) and members of residential community lived far from the MSWI (>10 km). Human blood serum samples were analyzed for all PCB congeners using high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS). The mean levels of total PCBs and dioxin-like PCBs in 87 serum samples were 242.77 ng/g lipid and 8.83 TEQ pg/g lipid, respectively. The PCB homologue profiles showed that penta-, hexa-, hepta-chlorinated biphenyls contributed more than 80% of the total PCBs concentration. The most abundant congeners were PCB153, PCB138, PCB180, PCB187, PCB118. A statistical analysis was performed to determine whether there were significant correlations between PCB concentrations and specific variables such as age, gender, smoking habits, occupation, BMI (Body Mass Index) and time of residence. As a result, the age was found to be strongly correlated with serum PCB concentrations. In addition, there were strong correlations between total PCBs and PCB153 (r=0.93, p<.0001), dioxin-like PCBs and PCB118 (r=0.98, p<.0001). So these two congeners are satisfactory indicators for total PCB concentrations and dioxin-like PCBs in human blood respectively.