Titre :

Development and Characterization of a Time-Sequenced Cascade Impactor: Application to Transient PM2.5 Pollution Events in Urbanized and Industrialized Environments

Auteur(s) :

Ngagine, Soulemane Halif [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Deboudt, Karine [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Flament, Pascal [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Choël, Marie [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Kulinski, Pierre [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]
Marteel, Fabien [Auteur]
Laboratoire de Physico-Chimie de l'Atmosphère [LPCA]

Titre de la revue :

Atmosphere

Nom court de la revue :

Atmosphere

Numéro :

13

Pagination :

-

Date de publication :

2022-03-25

ISSN :

2073-4433

Mot(s)-clé(s) en anglais :

rotary cascade impactor
PM2
5
collection efficiency
SEM-EDX
individual particle analysis
urban pollution event
atmospheric aerosol

Discipline(s) HAL :

Chimie/Chimie analytique

Résumé en anglais : [en]

To set up a sampling and analysis strategy for particulate matter (PM) based on the time periods used in international standards is often inadequate for assessing the impact of day/night cycles or episodic emissions on ...
Lire la suite >To set up a sampling and analysis strategy for particulate matter (PM) based on the time periods used in international standards is often inadequate for assessing the impact of day/night cycles or episodic emissions on urban air quality. To obtain a detailed physico–chemical characterization of urban PM when concentrations exceed the regulatory thresholds, a new rotary cascade impactor named the Time-Resolved Atmospheric Particle Sampler (TRAPS) was designed and tested for coarse and fine particle sampling. The TRAPS implementation, coupled with Optical Particle Counter measurements, provides time-resolved samples that can be analyzed by a wide range of single-particle analysis techniques. The TRAPS theoretical design was verified experimentally. Experimental cut-off diameters of 1.32 and 0.13 µm, respectively, for coarse and fine stages, were found in good agreement with theoretical values. Additionally, good trace separation, preventing inter-sample contamination, was evidenced by Scanning Electron Microscopy (SEM). The homogeneous distribution of particles of different types over a trace was also verified. As a case study, automated SEM-EDX analysis of 2500 particles, collected during two pollution peaks of a transient PM2.5 pollution event, revealed that individual particles’ chemical composition was influenced by local sources during the first pollution peak, and mainly transported during the second peak.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 :

2024-02-28T23:38:26Z
2024-03-20T08:18:19Z