Indoor and outdoor levels and sources of submicron particles (PM1) at homes in Edmonton, Canada

Journal article


Bari, Md Aynul, Kindzierski, Warren B., Wallace, Lance A., Wheeler, Amanda J., MacNeill, Morgan and Héroux, Marie-Ève. (2015) Indoor and outdoor levels and sources of submicron particles (PM1) at homes in Edmonton, Canada. Environmental Science and Technology. 49(11), pp. 6419 - 6429. https://doi.org/10.1021/acs.est.5b01173
AuthorsBari, Md Aynul, Kindzierski, Warren B., Wallace, Lance A., Wheeler, Amanda J., MacNeill, Morgan and Héroux, Marie-Ève
Abstract

Exposure to submicron particles (PM1) is of interest due to their possible chronic and acute health effects. Seven consecutive 24-h PM1 samples were collected during winter and summer 2010 in a total of 74 nonsmoking homes in Edmonton, Canada. Median winter concentrations of PM1 were 2.2 μg/m3 (interquartile range, IQR = 0.8–6.1 μg/m3) and 3.3 μg/m3 (IQR = 1.5–6.9 μg/m3) for indoors and outdoors, respectively. In the summer, indoor (median 4.4 μg/m3, IQR = 2.4–8.6 μg/m3) and outdoor (median 4.3 μg/m3, IQR = 2.6–7.4 μg/m3) levels were similar. Positive matrix factorization (PMF) was applied to identify and apportion indoor and outdoor sources of elements in PM1 mass. Nine sources contributing to both indoor and outdoor PM1 concentrations were identified including secondary sulfate, soil, biomass smoke and environmental tobacco smoke (ETS), traffic, settled and mixed dust, coal combustion, road salt/road dust, and urban mixture. Three additional indoor sources were identified i.e., carpet dust, copper-rich, and silver-rich. Secondary sulfate, soil, biomass smoke and ETS contributed more than 70% (indoors: 0.29 μg/m3, outdoors: 0.39 μg/m3) of measured elemental mass in PM1. These findings can aid understanding of relationships between submicron particles and health outcomes for indoor/outdoor sources.

Year2015
JournalEnvironmental Science and Technology
Journal citation49 (11), pp. 6419 - 6429
PublisherAmerican Chemical Society
ISSN0013-936X
Digital Object Identifier (DOI)https://doi.org/10.1021/acs.est.5b01173
Scopus EID2-s2.0-84930677150
Page range6419 - 6429
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited States of America
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