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| Titel |
Particle size distribution of nitrated and oxygenated polycyclic aromatic hydrocarbons (NPAHs and OPAHs) on traffic and suburban sites of a European megacity: Paris (France) |
| VerfasserIn |
J. Ringuet, E. Leoz-Garziandia, H. Budzinski, E. Villenave, A. Albinet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 18 ; Nr. 12, no. 18 (2012-09-28), S.8877-8887 |
| Datensatznummer |
250011484
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| Publikation (Nr.) |
 copernicus.org/acp-12-8877-2012.pdf |
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| Zusammenfassung |
| The size distribution of particulate nitrated and oxygenated polycyclic
aromatic hydrocarbons (NPAHs and OPAHs) was determined during two field
campaigns at a traffic site in summer 2010 and at a suburban site during the
MEGAPOLI (Megacities: Emissions, urban, regional and Global Atmospheric
POLlution and climate effects, and Integrated tools for assessment and
mitigation) experiment in summer 2009. Both, OPAHs and NPAHs were strongly
associated (>85%) to fine particles (Dp< 2.5 μm)
increasing the interest of their study on a sanitary point of view. Results
showed really different NPAH and OPAH particle size distributions between
both sites. At traffic site, clearly bimodal (notably for NPAHs) particle
size distributions (Dp = 0.14 and 1.4 μm) were observed, while the
particle size distributions were more scattered at the suburban site,
especially for OPAHs. Bimodal particle size distribution observed at traffic
site for the NPAH could be assigned to the vehicle emissions and the
particle resuspension. Broadest distribution observed at the suburban site
could be attributed to the mass transfer of compounds by
volatilization/sorption processes during the transport of particles in the
atmosphere. Results also showed that the combination of the study of
particle size distributions applied to marker compounds (primary:
1-nitropyrene; secondary: 2-nitrofluoranthene) and to NPAH or OPAH chemical
profiles bring some indications on their primary and/or secondary origin.
Indeed, 1,4-anthraquinone seemed only primary emitted by vehicles while
7-nitrobenz[a]anthracene, benz[a]antracen7,12-dione and benzo[b]fluorenone
seemed secondarily formed in the atmosphere. |
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