PCBs in Air from an Industrial Zone in a Coastal City-Tianjin, China

Zhi Yong Li; Yu Ling Zhang; Shi Qing Ni

doi:10.4028/www.scientific.net/AMM.587-589.546

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 587-589PCBs in Air from an Industrial Zone in a Coastal...

PCBs in Air from an Industrial Zone in a Coastal City-Tianjin, China

Abstract:

The 23 air samples were collected from Tianjin Dongli industrial zone from July 2010 to May 2011 for the analysis of 84 PCB congeners to investigate the gas/particle partitioning. The total PCBs concentration ranged from 71.08 to 567.36 pg m^-3 with the mean value as 307.78±137.45 pg m^-3 and the seasonal trends were summer >winter >spring >autumn. Gas PCBs accounted for 77.47% of the total PCBs. The fraction of each gas PCB homolog increased with the decreasing chlorine atoms. The contribution of gas PCBs to total PCBs showed a strong seasonal variation with summer (92.44%)> autumn (85.16%) > spring (80.61%) > winter (42.70%). Tri-, tetra-, penta-PCBs and di-PCBs were the predominantly homologs in atmosphere from industrial zone in Tianjin. The natural logarithm of partial pressure of PCBs were well correlated with the inverse absolute environmental temperature (R=0.77). The steep slope of-3764 obtained from Clausius–Clapeyron plot indicated the influence of local PCBs sources.

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Periodical:

Applied Mechanics and Materials (Volumes 587-589)

Pages:

546-549

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.587-589.546

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Online since:

July 2014

Authors:

Zhi Yong Li*, Yu Ling Zhang, Shi Qing Ni

Keywords:

Air, Gas/Particle Partitioning, PCBs, Seasonal Variation

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* - Corresponding Author

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