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PCB and PAH fluxes to a dated UK feat core.

Sanders, G. and Jones, K. C. and Hamilton-Taylor, J. and Dörr, H. (1995) PCB and PAH fluxes to a dated UK feat core. Environmental Pollution, 89 (1). pp. 17-25.

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Abstract

Concentrations of PCBs and PAHs have been determined from the individual sections of peat cores obtained from an ombrotrophic bog in rural north-west England. Chronological intervals throughout the core were determined from both radiometric (210Pb, 137Cs, 241Am) and independent, non-chemical characteristics (pollen, magnetics) information. Net fluxes of 25 individual PCB congeners and 14 PAH compounds to the bog were then derived. PCB inputs were apparent from the late-1930s/ early-1940s, with maximum sub-surface fluxes ( 1300 pg cm−2 year−1) observed at a depth corresponding to 1964. Loadings decreased by 65% over the following 15 year period before showing a surface enrichment. Initial increases in PAH loadings appear to coincide with the beginning of the Industrial Revolution, with fluxes peaking in the early-1930s (305 ng cm−2 year−1). Introduction of emission controls and the decline of heavy industry has led to an 80 % reduction in the net flux of PAHs to the bog over the last three to four decades. Potential effects of postdepositional diagenesis are considered, with particular reference to alteration of contaminant chronologies.

Item Type: Article
Journal or Publication Title: Environmental Pollution
Uncontrolled Keywords: Polynuclear aromatic hydrocarbons (PAHs) ; polychlorinated biphenyls (PCBs) ; air concentrations ; historical time trends ; peat
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 22336
Deposited By: ep_ss_importer
Deposited On: 05 Feb 2009 12:02
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:59
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/22336

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