 |
| Titel |
Chemical characterization and stable carbon isotopic composition of particulate Polycyclic Aromatic Hydrocarbons issued from combustion of 10 Mediterranean woods |
| VerfasserIn |
A. Guillon, K. Ménach, P.-M. Flaud, N. Marchand, H. Budzinski, E. Villenave |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 5 ; Nr. 13, no. 5 (2013-03-06), S.2703-2719 |
| Datensatznummer |
250018478
|
| Publikation (Nr.) |
 copernicus.org/acp-13-2703-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| The objectives of this study were to characterize polycyclic aromatic
hydrocarbons from particulate matter emitted during wood combustion and to
determine, for the first time, the isotopic signature of PAHs from nine wood
species and Moroccan coal from the Mediterranean Basin. In order to
differentiate sources of particulate-PAHs, molecular and isotopic
measurements of PAHs were performed on the set of wood samples for a large
panel of compounds. Molecular profiles and diagnostic ratios were measured
by gas chromatography/mass spectrometry (GC/MS) and molecular isotopic
compositions (δ13C) of particulate-PAHs were determined by gas
chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS). Wood
species present similar molecular profiles with benz(a)anthracene and
chrysene as dominant PAHs, whereas levels of concentrations range from 1.8
to 11.4 mg g−1 OC (sum of PAHs). Diagnostic ratios are consistent with
reference ratios from literature but are not sufficient to differentiate the
species of woods. Concerning isotopic methodology, PAH molecular isotopic
compositions are specific for each species and contrary to molecular
fingerprints, significant variations of δ13C are observed for
the panel of PAHs. This work allows differentiating wood combustion (with
δ13CPAH = −28.7 to −26.6‰) from
others origins of particulate matter (like vehicular exhaust) using isotopic
measurements but also confirms the necessity to investigate source
characterisation at the emission in order to help and complete source
assessment models. These first results on woodburnings will be useful for
the isotopic approach to source tracking. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|