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Polychlorinated dibenzo-p-dioxin and furan (PCDD/F) uptake by pasture.

Thomas, Gareth and Jones, Joanne and Jones, Kevin (2002) Polychlorinated dibenzo-p-dioxin and furan (PCDD/F) uptake by pasture. Environmental Science & Technology, 36 (11). pp. 2372-2378. ISSN 0013-936X

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Abstract

Uptake of airborne PCDD/Fs by a native pasture sward was studied. The concentrations of the less chlorinated PCDD/Fs (up to and including the Cl5DD/Fs) in pasture harvested on the same day after 2, 6, and 12 weeks exposure were the same, implying that air-pasture steadystate was reached within 2 weeks of exposure. The implications of these observations for the relative importance of input (atmospheric deposition, soil re-suspension) and loss (photolysis, degradation, volatilisation, cuticular shedding and growth dilution) processes are discussed and inferences made about the controlling factors. The concentrations of the more chlorinated PCDD/Fs were more variable. We infer that they were influenced by wash-off of particle- and surface-bound chemical. Up to 4 % of the Cl2-4DD/F and 4 -13 % of the Cl5-8DD/F loading on the pasture was estimated to have been supplied by adhering soil particles, with the remainder supplied by atmospheric deposition. Between 0.04 and 0.66 kg of each homologue group (excluding Cl2DFs) is estimated to be transferred annually from the atmosphere to pasture in the UK.

Item Type: Article
Journal or Publication Title: Environmental Science & Technology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 4395
Deposited By: Dr Gareth Thomas
Deposited On: 12 Mar 2008 16:07
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 18:10
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/4395

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