Further studies of the air-pasture transfer of PCBs.

Thomas, Gareth O. and Smith, K. E. C. and Sweetman, Andrew J. and Jones, Kevin C. (1998) Further studies of the air-pasture transfer of PCBs. Environmental Pollution, 102 (1). pp. 119-128. ISSN 0269-7491

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Abstract

Field survey and field experimental data are presented and interpreted in the context of the factors controlling the supply of polychlorinated biphenyls (PCBs) to the pasture sward. The field experimental data show that an air (gas phase)–pasture equilibrium was approached rapidly, within a few days, with a similar equilibrium attained between different grass species studied (Lolium perenne, Holcus lanatus, Festuca ovina). A mass balance model for a typical UK air–pasture–soil system is presented and used to estimate the distribution and rates of air–surface exchange and sequestration of PCBs into freshly growing plant biomass. A soil–air–vegetation model developed by Trapp and Matthies (1997, Environmental Science and Technology 31, 71–74) and other information is used to consider the possible influence of soil outgassing and sequestration versus the supply of PCBs from the bulk air to the pasture. It is hypothesised that a rapid approach to air–pasture equilibrium conditions could occur because PCBs are supplied from both the bulk air and by volatilisation from the underlying pastureland soil.

Item Type:
Journal Article
Journal or Publication Title:
Environmental Pollution
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2310
Subjects:
?? polychloroniated biphenylsairgrasssoilvolatilisationair-surface exchangepollutionhealth, toxicology and mutagenesistoxicologyge environmental sciences ??
ID Code:
21875
Deposited By:
Deposited On:
10 Feb 2009 16:12
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 10:01