Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories
Vapour and particle-associated concentrations of 15 polycyclic aromatic hydrocarbons (PAH) and 11 PAH quinones have been measured in winter and summer campaigns at the rural site, Weybourne in eastern England. Concentrations of individual PAH are relatively smaller than average concentrations measur...
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ftcopernicus:oai:publications.copernicus.org:acp21511 2023-05-15T17:30:35+02:00 Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories Alam, M. S. Delgado-Saborit, J. M. Stark, C. Harrison, R. M. 2018-01-15 application/pdf https://doi.org/10.5194/acp-14-2467-2014 https://www.atmos-chem-phys.net/14/2467/2014/ eng eng doi:10.5194/acp-14-2467-2014 https://www.atmos-chem-phys.net/14/2467/2014/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-14-2467-2014 2019-12-24T09:54:38Z Vapour and particle-associated concentrations of 15 polycyclic aromatic hydrocarbons (PAH) and 11 PAH quinones have been measured in winter and summer campaigns at the rural site, Weybourne in eastern England. Concentrations of individual PAH are relatively smaller than average concentrations measured previously at urban sites in the UK. The concentrations of PAH of the air masses originating from southern England and mainland UK are significantly larger than those from Eastern Europe and the North Atlantic, while quinone to parent PAH ratios show an inverse behaviour, being highest in the more aged North Atlantic polar air masses. While concentrations of 1,2-naphthoquinone decline from winter to summer, those of 1,4-naphthoquinone and anthraquinone increase suggesting a photochemical formation pathway. A comparison of congener concentration profiles measured at Weybourne with those from an urban source area (Birmingham) reveals differential losses at the rural site, especially evident in fluoranthene : pyrene ratios and consistent with the known rates of vapour phase reactions of 3 and 4 ring compounds with hydroxyl radical. The ratios of quinones to their parent PAH at Weybourne are greater than those in the urban source area indicating either more rapid loss processes for PAH, or formation of quinones during advection of the air mass, or probably both. Text North Atlantic Copernicus Publications: E-Journals Atmospheric Chemistry and Physics 14 5 2467 2477 |
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Copernicus Publications: E-Journals |
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English |
description |
Vapour and particle-associated concentrations of 15 polycyclic aromatic hydrocarbons (PAH) and 11 PAH quinones have been measured in winter and summer campaigns at the rural site, Weybourne in eastern England. Concentrations of individual PAH are relatively smaller than average concentrations measured previously at urban sites in the UK. The concentrations of PAH of the air masses originating from southern England and mainland UK are significantly larger than those from Eastern Europe and the North Atlantic, while quinone to parent PAH ratios show an inverse behaviour, being highest in the more aged North Atlantic polar air masses. While concentrations of 1,2-naphthoquinone decline from winter to summer, those of 1,4-naphthoquinone and anthraquinone increase suggesting a photochemical formation pathway. A comparison of congener concentration profiles measured at Weybourne with those from an urban source area (Birmingham) reveals differential losses at the rural site, especially evident in fluoranthene : pyrene ratios and consistent with the known rates of vapour phase reactions of 3 and 4 ring compounds with hydroxyl radical. The ratios of quinones to their parent PAH at Weybourne are greater than those in the urban source area indicating either more rapid loss processes for PAH, or formation of quinones during advection of the air mass, or probably both. |
format |
Text |
author |
Alam, M. S. Delgado-Saborit, J. M. Stark, C. Harrison, R. M. |
spellingShingle |
Alam, M. S. Delgado-Saborit, J. M. Stark, C. Harrison, R. M. Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories |
author_facet |
Alam, M. S. Delgado-Saborit, J. M. Stark, C. Harrison, R. M. |
author_sort |
Alam, M. S. |
title |
Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories |
title_short |
Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories |
title_full |
Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories |
title_fullStr |
Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories |
title_full_unstemmed |
Investigating PAH relative reactivity using congener profiles, quinone measurements and back trajectories |
title_sort |
investigating pah relative reactivity using congener profiles, quinone measurements and back trajectories |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-14-2467-2014 https://www.atmos-chem-phys.net/14/2467/2014/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-14-2467-2014 https://www.atmos-chem-phys.net/14/2467/2014/ |
op_doi |
https://doi.org/10.5194/acp-14-2467-2014 |
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Atmospheric Chemistry and Physics |
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14 |
container_issue |
5 |
container_start_page |
2467 |
op_container_end_page |
2477 |
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1766127437529219072 |