Influence of temperature on the plant/air partitioning of semivolatile organic compounds
Article Abstract:
The strong influence of temperature on plant/air partitioning of semivolatile organic compounds has no impact on plant concentrations under environmental conditions. This is due to the slow uptake/clearance kinetics which prevent the plant/air system from reacting rapidly to the new equilibrium state resulting from the temperature-induced change in the partition coefficient. This was gleaned in a study of the temperature dependence of the partitioning of polychlorinated biphenyls between air and ryegrass. Plant/air partition coefficients were found to be exponentially proportional to the reciprocal temperature, affirming theoretical expectations.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Evidence of a novel mechanism of semivolatile organic compound deposition in coniferous forests
Article Abstract:
A novel mechanism for the deposition of semivolatile organicc compounds in coniferous forests was identified in an experiment conducted to assess the role of deposition processes in the accumulation of PCDD/Fs in forest soils. Non-litter fall deposition accounted for 78%-95% of the homolog fluxes in a mature spruce stand and in an adjacent clearing in Germany in Jul. 1994, higher than litter fall and bulk deposition.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Initial development of a solid-phase fugacity meter for semivolatile organic compounds
Article Abstract:
A study of spruce needle surface fugacity and diffusive transport flux of semivolatile organochlorine compounds is presented. The transport of organic compounds from a gaseous to a solid phase is governed by equilibrium concentrations. Thus, diffusive transport was related to fugacity differences between the solid and gas phases. A fugacity meter was developed to determine true needle surface fugacity.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
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