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Gas-particle partition measurements of PAHs at Hazelrigg, UK.

Lee, Robert G. M. and Burnett, Victoria and Harner, Tom and Jones, Kevin C. (2000) Gas-particle partition measurements of PAHs at Hazelrigg, UK. Environmental Science and Technology, 34 (3). pp. 393-398. ISSN 0013-936X

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Abstract

Atmospheric concentrations of five organochlorine (OC) pesticides, some of which have been banned for a number of years, and polychlorinated naphthalenes (PCNs) were measured at a U.K. site over periods of 6 h for 7 days resulting in 28 samples. Mean concentrations of the pesticides were α-HCH 90 pg m-3, γ-HCH 500, p,p‘-DDE 8, dieldrin 63, endrin 22, and HCB 39. PCN mean homologue concentrations were 3CNs 67 pg m-3, 4CNs 78, 5CNs 5, 6CNs 0.6, 7CNs 0.6, and ∑PCNs 152. TEQ concentrations for those PCNs ascribed TEF values ranged between 0.36 and 3.6 fg m-3 which corresponds to 3.0−30% of the TEQ concentrations of PCDD/Fs at the same site. All the compounds measured, except HCB, exhibited a strong temperature-dependent diurnal cycling. Results from Clausius−Clapeyron plots show that pesticide concentrations were controlled by temperature-driven air-surface recycling throughout the first 5 days when stable atmospheric conditions were dominant, while during the last 2 days advection became more influential as more unstable and cooler weather started to influence the site. PCN concentrations were controlled primarily by a mixture of recycling and advection throughout the first 5 days and then by advection in the final 2 days, suggesting that there are ongoing emissions from diffuse point sources of PCNs into the U.K. atmosphere. This study provides further evidence of the rapid air-surface exchange of semivolatile organic compounds (SOCs) and shows how different factors alone or in combination can produce rapid changes in the atmospheric concentrations of past and present SOCs.

Item Type: Article
Journal or Publication Title: Environmental Science and Technology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21629
Deposited By: ep_ss_importer
Deposited On: 22 Jan 2009 16:11
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 20:25
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21629

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