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Global Fate of Persistent Organic Pollutants: Multimedia Environmental Modelling and Model Improvement  

Choi, Sung-Deuk (Department of Physical and Environmental Sciences, University of Toronto)
Chang, Yoon-Seok (School of Environmental Science and Engineering, Pohang University of Science and Technology(POSTECH))
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.12, no.1, 2007 , pp. 24-31 More about this Journal
Abstract
Global fates of polychlorinated biphenyl(PCB) were investigated with a fugacity based multimedia transport and fate model, Globe-POP(persistent organic pollutant). The accumulation of PCB was directly affected by the emission patterns of PCB into the atmosphere and surface areas of environmental compartments. Partition coefficients and reaction rates also influenced on the accumulation patterns of PCB. The emission patterns of PCB in 10 climate zones were consistent for the past 70 years, while the contribution of PCB in high-latitude zones to the globe has increased by cold condensation. Considering the amounts of emission and accumulation of PCB, the North temperature zone is regarded as an important source and sink of PCB. Meanwhile, in spite of no significant sources, POPs accumulate in Antarctic environments mainly due to extremely low temperature. Finally we suggested that a global water balance accounting for snow/ice should be incorporated into multimedia environmental models for high-latitude zones and polar regions with the seasonal snow pack and/or permanent ice caps. The modified model will be useful to evaluate the influence of climate change on the fate of POPs.
Keywords
Persistent Organic Pollutant; Multimedia Environmental Model; PCB; Globe-POP;
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