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Effect of Indoor and Outdoor Sources on Particulate Matter Concentration in a Naturally Ventilated Flat (URBAN-AEROSOL Project - Prague)

Martin Brani

Institute for Environmental Studies, Faculty of Science, Charles University in Prague, branis{at}natur.cuni.cz

Jan Hovorka

Institute for Environmental Studies, Faculty of Science, Charles University in Prague

Pavla ezácová

Institute for Environmental Studies, Faculty of Science, Charles University in Prague

Markéta Domasová

Institute for Environmental Studies, Faculty of Science, Charles University in Prague

Mihalis Lazaridis

Technical University of Crete, Department of Environmental Engineering, 7311 Chania, Greece

Indoor and outdoor characteristics of particulate matter (PM) were studied in a naturally ventilated flat. Twenty-four-hour concentrations of indoor PM₁, PM_2.5 and PM₁₀ and outdoor PM_2.5 were measured. In winter all indoor concentrations of PM fractions were highly correlated (r 0.97 to 0.98). High correlation was also found between ambient PM₁₀ and outdoor PM_2.5 (r 0.99). In summer, the correlations between all PM fractions were lower. Human activity had a stronger effect on indoor PM concentrations in winter than in summer but only when the outdoor levels were low. During the second winter campaign higher outdoor concentrations were able to mask indoor sources. The presence of people corresponded to elevated levels of coarse particle fractions, cooking was associated with higher levels of fine particles. In summer with windows open, indoor PM values were not associated with human activity. A significant negative association was registered between wind speed and indoor PM.

Key Words: Indoor air quality • Urban air • PM10 • PM2.5 • PM1

Indoor and Built Environment, Vol. 14, No. 3-4, 307-312 (2005)
DOI: 10.1177/1420326X05054284


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