Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Characteristic Factors of Air-Plant Partitioning of PCBs

PCBs의 대기-식물간 분배 특성 인자들

  • Published : 2001.10.01
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Abstract

The concentrations of PCBs (polychlorinated biphenyls) in air and plants (MOrus allba, Allum turberosum) were measured every other week at Hankyong University located in Ansung, Kyoung-ki province, Korea from July to November in 1999. Total concentrations of PCBs in air ranged from 19.8 to 71.9 pg/ $m^3$. It was observed in air that the concentrations of tai-chlorinated biphenyls(CBs) were higher than those of other PCB homologs probably due to their higher vapor pressure. Total concentrations of PCBs in plants ranged from 24.5 to 1,287 pg/g dry weight for Morus allba and 26.5 to 337 pg/g dry weight for Allum turberosum. A positive linear correlation was observed between log plant-air partition coefficients ( $m^3$air/g plant dry weight-defined here as the scavenging coefficient[S.C]) and log octanol-air partition coefficients ( $K_{oa}$ ) for each plant. In this study, slope of log S.C and log $K_{oa}$ for Morus allba, Allum turberosum were 1.07 ($R^2$= 0.83, p<0.01), 0.84 ($R^2$=0.53, p<0.05), respectively. This means that these plants may approach to equilibrium for air-plant partitioning.

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References

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