Titre :

Atmospheric particulate matter deposition on birch catkins and pollen grains before pollination

Auteur(s) :

Choël, Marie [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Visez, Nicolas [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Secordel, Xavier [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Deboudt, Karine [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]

Titre de la revue :

Aerobiologia

Nom court de la revue :

Aerobiologia

Numéro :

-

Pagination :

-

Date de publication :

2022-03-16

ISSN :

0393-5965

Mot(s)-clé(s) en anglais :

Catkins
Industrial air pollution
Betula
Pollen allergy

Discipline(s) HAL :

Chimie

Résumé en anglais : [en]

Birch is the most allergenic tree species in Northern and Central Europe. Airborne birch pollen concentrations are observed to be on the rise for several decades. Health hazard due to birch pollen grains (BPGs) can worsen ...
Lire la suite >Birch is the most allergenic tree species in Northern and Central Europe. Airborne birch pollen concentrations are observed to be on the rise for several decades. Health hazard due to birch pollen grains (BPGs) can worsen due to particulate air pollution. The prevalence of the intimate mixture of BPGs with atmospheric particulate matter (APM) at the single pollen grain level is still unraveled. In this study, APM transfer mechanisms to birch catkins and BPGs prior to pollination were investigated at an urban-industrial and a peri-urban site in Northern France. The surface of catkins was heavily polluted with micrometer-sized particles. Conversely, BPGs were relatively unpolluted with on average 0.1 particle.BPG−1. Differences in the chemical composition of adhered particles were observed as a function of the sampling sites. In contrast, no significant difference was found in terms of surface concentrations of APM adhered to BPGs and catkins between the two sites. Comparison of the number of particles deposited per pollen grain according to whether they were harvested from catkins or collected while airborne suggests that particulate pollution of pollen occurs preferentially after pollen shedding, either by impaction or coagulation mechanisms with other suspended APM or by pollen settling on dust-contaminated surfaces followed by resuspension.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Date de dépôt :

2024-02-28T23:38:10Z
2024-03-20T08:26:08Z