Development and Characterization of a ...
Document type :
Article dans une revue scientifique: Article original
DOI :
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Title :
Development and Characterization of a Time-Sequenced Cascade Impactor: Application to Transient PM2.5 Pollution Events in Urbanized and Industrialized Environments
Author(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]
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]
Journal title :
Atmosphere
Abbreviated title :
Atmosphere
Volume number :
13
Pages :
-
Publication date :
2022-03-25
ISSN :
2073-4433
English keyword(s) :
rotary cascade impactor
PM2
5
collection efficiency
SEM-EDX
individual particle analysis
urban pollution event
atmospheric aerosol
PM2
5
collection efficiency
SEM-EDX
individual particle analysis
urban pollution event
atmospheric aerosol
HAL domain(s) :
Chimie/Chimie analytique
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Université de Lille
CNRS
CNRS
Collections :
Submission date :
2024-02-28T23:38:26Z
2024-03-20T08:18:19Z
2024-03-20T08:18:19Z
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