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3 results on '"Atmospheric pcbs"'

1. Determining Sources of Atmospheric Polychlorinated Biphenyls based on Their Fracturing Concentrations and Congener Compositions.

Author

Uraki, Yoko, Suzuki, Shigeru, Yasuhara, Akio, and Shibamoto, Takayuki

Subjects
*POLYCHLORINATED biphenyls, *BIPHENYL compounds, *MUNICIPAL solid waste incinerator residues, *WASTE products, *INDUSTRIAL wastes, *ENVIRONMENTAL engineering
Abstract

Air samples collected at 23 sites in Kanagawa Prefecture, Japan in 1998 and 1999 were analyzed for PCBs by a high-resolution gas chromatograph/mass spectrometer. Concentrations of PCBs ranged from 10 to 3290 pg/m3 N (geometric average, 120 pg/m3N) and were mostly less than 140 pg/m3 N. The toxicity equivalency quantity (TEQ) values of co-planar PCBs ranges from not detected (ND) to 0.35 pg-TEQ/m3 N (mean value, 0.00063 pg-TEQ/m3 N). Cl3-PCBs comprised the highest level in many air samples. PCB congeners in the samples collected on three consecutive days did not vary significantly, suggesting that variation of PCBs concentrations is minimal among the samples collected at same sites. On the other hand, the pattern similarities of PCBs in the samples collected at various areas were not consistent. Contamination from commercial PCBs (Kaneclor) was observed in some samples with high PCBs concentrations. The compositions of PCB congeners in the samples collected at the sites near municipal waste incinerators were similar to those of PCB congeners in the samples collected at common environments in Japan, whereas they were completely different from those in the exhaust gases collected directly from municipal waste incinerators. Consequently, contribution of exhaust gases from incinerators to PCB concentrations and/or compositions of all air samples collected in the present study was not observed. [ABSTRACT FROM AUTHOR]

Published
2004
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2. Characterization of gas/particle concentrations and partitioning of polychlorinated biphenyls (PCBs) measured in an urban site of Turkey

Author

S. Sıddık Cindoruk, Yücel Tasdemir, Uludağ Üniversitesi/Mühendislik Fakültesi/Gıda Mühendisliği Bölümü., Cindoruk, S. Sıddık, Taşdemir, Yücel, and AAG-9468-2021

Subjects
Turkey, Atmospheric transport, Health, Toxicology and Mutagenesis, Semivolatile organic compounds, Urban site, Dry deposition, Toxicology, Organochlorine Pesticides, Endrin, Heptachlor, Molecular weight, Air movements, Polycyclic aromatic-hydrocarbons, Wind sector, Models, theoretical, PCB, Chemistry, Correlation analysis, Environmental monitoring, Dust, Particle size, General Medicine, Volatile organic compound, Pollution, Pollutant transport, Long range transport, Partition coefficient, Congener, Correlation methods, Lake-michigan, Environmental chemistry, Gas-phasepesticide concentrations, Gases, Air movement, Regression analysis, Partitioning, Water-surface sampler, Air pollutants, Air pollution, Transport, Wind effects, Temperature-dependence, Article, Semivolatile organic-compounds, Meteorology, Polychlorinated biphenyls, Partitioning model, Vapor-pressure, Volatile organic compounds, Cities, Bursa [Turkey], Persistent organic pollutant, Atmospheric pollution, Atmospheric pcbs, Modeling, Urban area, Aerosol, Environmental sciences, Concentration (parameters), Eurasia, Particle, Trajectory analysis, Congeners
Abstract

Air concentrations of polychlorinated biphenyls (PCBs) in both gas and particle phases were measured in an urban site (BUTAL-Merinos) of the city of Bursa, Turkey between August 2004 and May 2005. The mean of total (particle + gas) PCB concentrations was about 491.8 +/- 189.4 pg/m(3). The main contributors for PCBs in the sampling site were the local sources and long-range atmospheric transport supported by back trajectory analysis. Lower molecular weight PCB congeners generally dominated in the samples. The particle phase of the measured PCBs accounted for 15% of the total PCB concentrations. Gas/particle distribution was investigated using different approaches such as log K-p-log P-L(o), log K-p -log K-OA and the Junge-Pankow model. Regression analysis among log K-p, log P-L(o) and log K-OA exhibited significant correlation at p < 0.05. Correlation between PCB homologs and meteorological parameters was formed to investigate the possible relationships.

Published
2007

3. Ambient air levels and trends of polychlorinated biphenyls at four different sites

Author

Yücel Tasdemir, S. Sıddık Cindoruk, Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü., Cindoruk, Sabahattin Sıddık, and AAG-9468-2021

Subjects
Turkey, Health, Toxicology and Mutagenesis, Air pollution, Wind profile, medicine.disease_cause, Toxicology, Coastal zone, Organochlorine Pesticides, Endrin, Heptachlor, Gas phase, Polycyclic aromatic-hydrocarbons, Traffic and transport, Chemsitry, media_common, Priority journal, Total organic carbon, PCB, Baltic sea, Statistics, Aİr sampling, Environmental monitoring, General Medicine, Pollution, Ambient air, Correlation, University campus, Watter-sampler surface, Seashore, Environmental chemistry, Lake-michigan, Trend study, Organochlorine pesticides, Partitioning, Air pollutants, media_common.quotation_subject, Air sampler, Partition-coefficient, Phase PCB concentrations, Article, Polychlorinated biphenyl, Meteorology, Polychlorinated biphenyls, Environmental sciences & ecology, medicine, Polybrominated diphenyl ethers, Gas/particle concentrations, Ecotoxicology, Air sampling, Residental area, Bursa [Turkey], Atmospheric pollution, Atmosphere, Air pollutant, Urban area, Phase partitioning, Concentration (composition), Environmental sciences, Atmospheric PCBS, Environmental science
Abstract

In this study, samples were collected in order to determine atmospheric levels of polychlorinated biphenyls (PCBs) in four different sites by using a high-volume air sampler (HVAS). Eighty-three congeners of gas and particle- phase PCBs were investigated in air samples. The total (gas + particle) concentrations for Mudanya (coastal), Butal (traffic/urban), the Uludag University Campus (semirural), and Yavuz Selim (residential) were determined as 570, 394, 412, and 316 pg/m(3), respectively. These levels coincide with the values reported for the sites having similar characteristics. In terms of homolog groups, 3-chlorinated biphenyls (3-CBs) and 4-CBs constituted at least 47% of the total PCB concentration. PCBs in all sites were determined mostly in the gas phase, with a percentage from 85 to 95%. Obtained atmospheric PCB data were correlated with meteorological parameters and a significant relationship was obtained between coastal and semirural sites (p

Published
2010

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