Caractérisation et identification de la variabilité temporelle des sources de particules dans un environnement intérieur : approche statistique

Rachid Ouaret (1, 2) , Anda Ionescu (1) , Olivier Ramalho (2) , Viorel Petrehus (3) , Yves Candau (1)

1 CERTES EA 3481 - Centre d'Etudes et Recherches en Thermique, Environnement et Systèmes [Créteil]
2 CSTB - Centre Scientifique et Technique du Bâtiment
3 UTCB - Technical University of Civil Engineering of Bucharest = Université Technique de Génie Civil de Bucarest

Particle number concentration (particles 0.3-20 μm in aerodynamic diameter) and CO2 concentration were monitored in an office occupied by one adult during 45 days. The temporal characterization and source identification of indoor particulate matter were studied using principal component analysis (PCA) and Independent Component Analysis (ICA). The resulting temporal profiles were explained by relating the calculated source contributions to the information provided by the autocorrelation function. Four particle sources were identified and characterized. The source of 3,5-8,75 μm diameter particles was associated with occupant activity. A random emission source was found to be associated with the larger particles and one continuous emission source was associated with the fine particles.

Domaines: Sciences de l'environnement

Rachid Ouaret, Anda Ionescu, Olivier Ramalho, Viorel Petrehus, Yves Candau. Caractérisation et identification de la variabilité temporelle des sources de particules dans un environnement intérieur : approche statistique. 29ème Congrès Français sur les Aérosols, Jan 2014, Paris, France. 6 p. ⟨hal-01064389⟩