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Tytuł:
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Sources and composition of metals in indoor house dust in a mid-size Canadian city.
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Autorzy:
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Dingle JH; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Kohl L; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Khan N; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Meng M; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Shi YA; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Pedroza-Brambila M; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada.
Chow CW; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada; University of Toronto, Faculty of Medicine, 1 King's College Cir, Toronto, ON, M5S 1A8, Canada; University of Toronto, Dalla Lana School of Public Health, 155 College St, Toronto, ON, M5T 3M7, Canada.
Chan AWH; University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto, ON, M5S 3E5, Canada. Electronic address: .
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Źródło:
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Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2021 Nov 15; Vol. 289, pp. 117867. Date of Electronic Publication: 2021 Jul 29.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Barking, Essex, England : Elsevier Applied Science Publishers, c1987-
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MeSH Terms:
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Air Pollution, Indoor*/analysis
Metals, Heavy*/analysis
Alberta ; Cities ; Dust/analysis ; Environmental Monitoring ; Metals/analysis ; Risk Assessment
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Contributed Indexing:
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Keywords: House dust composition; Indoor sources; Trace metals; Wildfire impacts
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Substance Nomenclature:
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0 (Dust)
0 (Metals)
0 (Metals, Heavy)
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Entry Date(s):
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Date Created: 20210810 Date Completed: 20210929 Latest Revision: 20210929
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Update Code:
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20240105
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DOI:
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10.1016/j.envpol.2021.117867
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PMID:
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34375850
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House dust is an important medium for exposure to persistent pollutants, such as metals. Detailed characterization of metal composition is needed to identify sources and potential health impacts of exposure. In this study we show that specific metals in dust dominate in different locations within residential homes in a mid-size Canadian city (Fort McMurray, Alberta), up to two years after a major wildfire event in 2016. Dust samples were collected in high-traffic (e.g. bedroom, N = 186), low-traffic (e.g. basement, N = 158), and entranceway areas (N = 171) of residential homes (N = 125), and analyzed for 25 trace metal elements using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The profile of metal concentrations in the entranceway resembled that of outdoor soils, especially for crustal elements. On the other hand, Cu, Zn, and Pb concentrations in dust sampled in indoor living areas were on average three to six times higher than in other indoor locations indicating indoor sources for these elements. In general, Pb concentrations were similar or lower than in an average Canadian residence, but a substantial fraction showed anomalously high concentrations in the low-traffic areas, particularly on concrete surfaces in basements. Notably, the 2016 wildfires showed limited influence on metal concentrations in indoor dust, despite the widespread concerns in the community about long term exposure. Enrichment factor ratio calculations and principal component analysis showed two classes of sources of metals in dust that represent geogenic-outdoor sources and anthropogenic-indoor sources. Overall, we demonstrate that outdoor and indoor sources of dust impact its composition, and these influences are reflected in the different areas of a home.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
