• Title, Summary, Keyword: PCBs

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Reduction of PCBs in Contaminated Marine Sediments by Using Fenton-like Reaction with Surfactants (유사-펜톤 반응과 계면활성제에 의한 해양퇴적물의 PCBs 정화)

  • Choi, Jin Young;Kim, Kyoungrean
    • Journal of Korean Society of Environmental Engineers
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    • v.37 no.6
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    • pp.340-348
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    • 2015
  • Removal efficiency of PCBs in contaminated marine sediments treated by Fenton-like oxidation combined with surfactant was investigated in this research in order to achieve remediation of PCBs. A washing treatment using various concentrations of hydrogen peroxide (1% and 15%) and surfactants (Triton X-100, Tween 60 and Tween 80) was evaluated at various conditions in laboratory scale experiments. The mean removal efficiencies of tPCBs varied from 24.1 to 46.7% in the sediments for 1 hour duration of the treatments. The concentration of tPCBs in contaminated marine sediments after the simultaneous treatment with hydrogen peroxide and surfactant satisfied the domestic environmental standards for the beneficial use of sediments. When suitable surfactant was used for Fenton-like oxidation, the removal efficiency of tPCBs at low concentration of hydrogen peroxide was similar to that at high hydrogen peroxide concentration. Thus the efficient removal of PCBs in contaminated marine sediments could be achieved through treatment with Fenton-like oxidation combined with surfactant washing.

Concentrations of PCBs (Polychlorinated Biphenyls) in coastal sediments of Korea (국내 연안 퇴적물내 PCBs(Polychlorinated Biphenyls) 오염도 현황)

  • Kim, Gi-Whan;Lee, Yoon
    • Journal of environmental and Sanitary engineering
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    • v.11 no.3
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    • pp.9-12
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    • 1996
  • Polychlorinated biphenyl (PCBs) is one of major toxic pollutants in marine environments, This artificial chlorinated compound has been found in freshwater, seawater, soil, sediments and organismes living in various environments. Because of its toxicity and degradability, its uses in industrial processes have been banned after 1984 in Korea. Coastal area is an important environment for agriculture, industry, transportation, reduction of pollution loads through biogeochemical processes, cycling of nutrients and recreation. Input of pollutants from land and freshwater has been occurring through runoff, rivers and estuaries. Concentrations of PCBs were determined with GC-ECD. Concentrations of PCBs were in the range of 1.0 - 19.2 ng/g-dry weight of sediment(g-d.w.) at Ulsan, 4.5 -8,2 ng/g-d.w. at Onsan, 2.7 - 33.5 ng/g-d.w. at Masan and 4.0 - 60.7 ng/g-d.w. in Kwangyang, In Inchon area, PCBs were not detected in sediments. In sediments of Nakdong estuary, the distribution of PCBs' concentrations was 0.19 - 303 ng/g-d.w.

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Polychlorinated Biphenyls (PCBs) in the Bio-geochemistry of Oceans

  • Kannan, Narayanan
    • Journal of Marine Bioscience and Biotechnology
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    • v.2 no.4
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    • pp.201-208
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    • 2007
  • Polychlorinated biphenyls (PCBs) are anthropogenic contaminants found globally in water, ice, soil, air and sediment. Modern analytical techniques allow us to determine these chemicals in environmental matrices at parts per trillion levels or lower. Environmental forensic on PCBs opens up new avenues of investigation such as transport and fate of water masses in oceans, sedimentation, onset of primary production, migration of marine mammals, their population distribution and pharmacokinetics of drugs inside organisms. By virtue of persistence, bioaccumulation, bioconcentration and structure-activity relationship PCBs emerge as unconventional chemical tracers of new sort.

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Risk Assessment of Polychrorinated Biphenyls (PCBs) through Food Intake for the Korean Population (식품 중 폴리염화비페닐 위해평가)

  • Paek, Ockjin;Suh, Junghyuk;Park, Heera;Oh, Keumsoon;Hong, Selyung;Lee, Hyunkyung;Kim, Meehye
    • Korean Journal of Food Science and Technology
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    • v.45 no.3
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    • pp.364-369
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    • 2013
  • Polychlorinated biphenyls (PCBs) have been studied during the past few decades because of their potential impacts on the environment and human health. PCBs are toxic environmental pollutants and persistent organic pollutants (POPs). This study was carried out to assess the dietary exposure and risk to PCBs for the general Korean population through food intake. Various samples (n=389) covering 28 kinds of food were collected from 5 cities in Korea. The PCB content was not detected-$182.4{\mu}g/kg$ (mean of $5.4{\mu}g/kg$) in the food. The mean dietary exposure of PCBs for the general population was 9.54 ng/kg bw/day with an intake of 0.19% of tolerable daily intake (TDI) ($5{\mu}g/kg$ bw/day). Therefore, the level of overall dietary exposure to PCBs for the Korean population through food intake is below the recommended TDI levels.

Distribution Characteristics of Polychlorinated Biphenyls in Sediments inside Jeju Harbor (제주항내 퇴적물의 PCBs 분포특성)

  • Heo, Ryun-Yong;Kam, Sang-Kyu;Cho, Eun-Il
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.22 no.2
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    • pp.220-227
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    • 2016
  • In this paper, polychlorinated biphenyls (PCBs) were measured in surface sediments collected three times (June, October, December, 2013), inside Jeju Harbor as major harbors of Jeju Island. The concentration of PCBs inside Jeju Harbor was in the range of 1.62~4.45 (mean) ng/g on a dry weight basis and the levels were very low. In the analysis of PCBS homologue patterns, high-chlorinated PCB congeners were dominant in surface sediments inside Jeju Harbor, indicating that their sources were originated from shipping activity. In the relationships between PCBs concentrations and particle size (mud, sand and gravel) in surface sediments, PCBs concentrations were higher in the sediments with higher mud content, indicating that higher PCBs were distributed with increasing sediments of fine gradules. The PCBs concentrations in surface sediments in this study were very low, compared with ER-L (effect range-low) and TEL (threshold effects level) among sediment quality guideleines (SQGs) applied in foreign countries, such as USA, Canada, and Australia, etc), indicating that their biological effects on the bottom organisms in marine environment were expected to be very low.

Studies on the Development of Detoxicating Agents of Polychlorinated biphenyls Toxicity (Polychlorinated biphenyls 중독 해독제의 개발에 관한 연구)

  • 정기화;장판섭
    • Journal of Food Hygiene and Safety
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    • v.2 no.2
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    • pp.51-56
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    • 1987
  • The effects of ethanol extracts from Asparagus cochinchinensis, Polggonatum officinale, Poria cocos, Panax ginseng and Acanthopanax sessiliflorum on the toxicity of polychlorinated biphenyls(PCBs) were examined and following results were obtained. By the administration of these extracts, PCBs intoxicated rats showed the normalizing tendency in body weights and various hematological parameters-counts of red blood cell and white blood cell, hemoglobin content and hematocrit value. These extracts ameliorated the elevated levels of serum cholesterol, total lipids, $_{8}-GOT-,\;_{8}-GPT$ and s-alkaline phosphatase activities of PCBs intoxicated rats.

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Estimation of Bio-Monitoring for PCBs Concentration in Air Using Plant (식물을 이용한 대기 중 PCBs의 농도 예측 평가)

  • 여현구;최민규;천만영;김태욱;선우영
    • Journal of Korean Society for Atmospheric Environment
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    • v.18 no.4
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    • pp.265-274
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    • 2002
  • The concentrations of polychlorinated biphenyls (PCBs) in air and plant were measured every other week at Hankyong University located in Ansung, Kyoung-ki province from July to November of 1999. The predicted PCB concentrations in air derived from measured Morus allba were compared with ambient measurement data. This was necessary to test the possibility of using the two equations incorporating Riederer's and Bacci's bioconcentration factors (BCFs) based on the octanol-air partition coefficient (Ksub/oa/) to predict the air-plant equilibrium of PCBs. Ratios of calculated to measured PCB concentrations in air were 2.4 (1.24~4.36), 2.7 (0.17~7.96) using Riederer's and Bacci's equations, respectively Regression analysis between PCBs calculated by Riederer's equation and PCBs directly measured in air, showed correlation ($R^2$= 0.90). However, slope of regression between calculated and directly measured PCB concentrations was above 1. The results thus suggest that calculated PCBs were overestimated comparing with direct measurements. Bio-monitoring using Morus allba may have possibilities in predicting PCBs concentration in air with a further extension of air-plant equilibrium research.

Effects of PCB Congeners in Rodent Neuronal Cells in Culture : Effects of Chitosan (PCB 이성질체가 설치류 신경세포에 미치는 영향: 키토산의 효과)

  • Kim, Sun-Young;Lee, Hyun-Gyo
    • Environmental Analysis Health and Toxicology
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    • v.22 no.3
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    • pp.279-285
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    • 2007
  • The present study attempted to analyze the mechanism of PCB-induced neurotoxicity with respect to the PKC signaling. Since the developing neuron is particularly sensitive to PCB-induced neurotoxicity, we isolated cerebellar granule cells derived from 7-day old SD rats and grew cells in culture for additional 7 days to mimic PND-14 conditions. Only non-coplanar PCBs at a high dose showed a significant increase of total PKC activity at $[^3H]PDBu$ binding assay, indicating that non-coplanar PCBs are more neuroactive than coplanar PCBs in neuronal cells. PKC isoforms were immunoblotted with respective monoclonal antibodies. PKC-alpha and-epsilon were activated with non-coplanar PCB exposure. The result suggests that coplanar PCBs have a PKC pathway different from non-coplanar PCBs. Activation of PKC with exposure was dampened with treatment of high molecular weight of chitosan. Chilean (M.W. > 1,000 kDa) inhibited the total activity of PKC induced by the non-coplanar PCBs. Translocation of PKC isoforms was also inhibited by the high molecular weight of chitosan. The study demonstrated that non-coplanar PCBs are more potent neurotoxic congeners than coplanar PCBs and the alteration of PKC activities by PCB exposure can be blocked with the treatment of chitosan. The results suggest a potential use of chitosan as a means of nutritional intervention to prevent the harmful effects of pollutant-derived diseases.

Effects of Polychlorinated Biphenyls (PCBs) on the Reproduction of the Oily Bitterling, Acheilognathus koreensis(Teleostei: Cyprinidae) (칼납자루, Acheilognathus koreensis의 생식에 미치는 polychlorinated biphenyls (PCBs)의 영향)

  • 정선영;진영국;이정식
    • Korean Journal of Environmental Biology
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    • v.22 no.1
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    • pp.159-166
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    • 2004
  • The effects of polychlorinated biphenyls (PCBs) on the reproduction of the oily bitterling, Acheilognathus koreensis were investigated using histological methods. The experimental fishes were exposed to 0. 3.4, 9.3 and 25.8 ${\mu}g\; L^{-1}$ PCBs fey 8 weeks. Dead fishes and abnormal behavior were not observed in control and PCBs exposure group. In compared with control group, PCBs exposure fishes showed differences of gonadal development, gonadosomatic index (GSI), hepatosomatic index (BSI), nuptial color index (NCI) and ovipositor length index (OLI). These results showed that PCBs could disrupt reproductive process in the fish.