reference : Indoor particulate matter of outdoor origin: Importance of size-dependent removal mechanisms

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Bibliographic fields
reftype Journal Article
Abstract Adverse human health effects have been observed to correlate with levels of outdoor particulate matter (PM), even though most human exposure to PM of outdoor origin occurs indoors. In this study, we apply a model and empirical data to explore the indoor PM levels of outdoor origin for two major building types: offices and residences. Typical ventilation rates for each building type are obtained from the literature. Published data are combined with theoretical analyses to develop representative particle penetration coefficients, deposition loss rates, and ventilation-system filter efficiencies for a broad particle size range (i.e., 0.001-10 microm). We apply archetypal outdoor number, surface area, and mass PM size distributions for both urban and rural airsheds. We also use data on mass-weighted size distributions for specific chemical constituents of PM: sulfate and elemental carbon. Predictions of the size-resolved indoor proportion of outdoor particles (IPOP) for various conditions and ambient particle distributions are then computed. The IPOP depends strongly on the ambient particle size distribution, building type and operational parameters, and PM metric. We conclude that an accurate determination of exposure to particles of ambient origin requires explicit consideration of how removal processes in buildings vary with particle size.
Author Riley, W. J.; McKone, T. E.; Lai, A. C.; Nazaroff, W. W.
DOI 10.1021/es010723y
Date Jan 15
ISSN 1520-5851
Issue 2
Journal Environmental Science & Technology
Keywords Air Movements; Air Pollutants/*analysis; Air Pollution, Indoor/*analysis; *Environmental Exposure; Forecasting; Humans; *Models, Theoretical; Particle Size; Public Health
Language eng
Notes Riley, William J McKone, Thomas E Lai, Alvin C K Nazaroff, William W Journal Article Research Support, U.S. Gov't, Non-P.H.S. United States Environ Sci Technol. 2002 Jan 15;36(2):200-7.
Pages 200-207
Title Indoor particulate matter of outdoor origin: Importance of size-dependent removal mechanisms
Volume 36
Year 2002
Bibliographic identifiers
.reference_type 0
_record_number 18541
_uuid 4385426c-155d-4006-90c0-9d1ec59b5247