Impact of ozone on indoor air quality: a preliminary field study
Résumé
The purpose of this paper is to document the potential impact on indoor air quality of outdoor ozone during photochemical pollution episodes. A preliminary one-day experiment was conducted during summer 2002 in a room of the CSTB experimental house MARIA. Ozone, VOC and aldehyde concentrations were monitored outdoors and indoors from 8 a.m. to 8 p.m. Outdoor ozone hourly mean concentrations increased from 30 to 100 μg/m3 during the day. The indoor to outdoor ratio ranged from 0.10 to 0.25, indicating possible ozone-induced reactions occurring indoors. α-Pinene concentrations decreased from 30 to 15 μg/m3 suggesting indoor gas phase reactions. At the same time, formaldehyde concentrations increased from 70 to 100 μg/m3. Both heterogeneous reactions of ozone with building products and gas phase reactions of ozone with some indoor pollutants (mainly terpenes) could produce secondary pollutants, such as aldehydes, as observed during this experiment.
Domaines
Sciences de l'environnement
Origine : Fichiers produits par l'(les) auteur(s)
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