Titre :

PAHs associated with the leaves of three deciduous tree species. I — Concentrations and profiles

Auteur(s) :

Howsam, Michael [Auteur]
Centre Universitaire de Mesures et d'Analyses [Université de Lille] [CUMA]
Lille Inflammation Research International Center - U 995 [LIRIC]
Facteurs de Risque et Déterminants Moléculaires des Maladies liées au Vieillissement - U 1167 [RID-AGE]
Jones, K.C [Auteur]
Lancaster Environment Centre
Ineson, P [Auteur]
University of York [York, UK]

Titre de la revue :

Environmental Pollution

Pagination :

413-424

Éditeur :

Elsevier

Date de publication :

2000-06

ISSN :

0269-7491

Résumé en anglais : [en]

Results for the concentrations of total polycyclic aromatic hydrocarbons (ΣPAH) and the PAH profile in leaves from three deciduous tree species from the same woodland are presented, and discussed with reference to environmental ...
Lire la suite >Results for the concentrations of total polycyclic aromatic hydrocarbons (ΣPAH) and the PAH profile in leaves from three deciduous tree species from the same woodland are presented, and discussed with reference to environmental and leaf-related variables. There were significant differences between oak, ash and hazel leaves in their ΣPAH concentrations (sum of 23 PAHs), and in the relative contribution of individual PAHs to the sum. Leaves exhibiting pubescence (hairiness) were found to have significantly higher ΣPAH concentrations than hairless leaves, regardless of their position in the vegetation strata of the wood. Hazel leaves from the understorey had a PAH profile consisting of a greater proportion of the 4-, 5- and 6-ring PAHs than oak or ash from the canopy. This was concluded to be the result of the filtering effect of the main canopy on the air passing over and through it, with subsequent transfer of particles and attendant PAHs to the understorey below. The proportion of ΣPAH contributed by the 6-ring PAH in hazel leaves was negatively correlated with distance from the southern edge of the canopy. It is proposed that the predominantly windward edges of the woodland, where atmospheric turbulence is likely to be greatest, favoured the deposition of particle-bound PAHs to leaves.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Facteurs de risque et déterminants moléculaires des maladies liées au vieillissement (RID-AGE) - U1167

Source :

Harvested from HAL