Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility
A fluidized bed aerosol generator was connected to a 13-stage cascade impactor (nanoMOUDI) for the size fractionation of urban dust (<10 µm), followed by the gravimetric analysis of loaded PTFE filter samples. This method was used to characterize the PM<sub>10</sub> (thoracic) fractio...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/11/2/87 |
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| author | Christine Levesque Clare L. S. Wiseman Suzanne Beauchemin Pat E. Rasmussen |
| author_facet | Christine Levesque Clare L. S. Wiseman Suzanne Beauchemin Pat E. Rasmussen |
| author_sort | Christine Levesque |
| collection | DOAJ |
| description | A fluidized bed aerosol generator was connected to a 13-stage cascade impactor (nanoMOUDI) for the size fractionation of urban dust (<10 µm), followed by the gravimetric analysis of loaded PTFE filter samples. This method was used to characterize the PM<sub>10</sub> (thoracic) fraction of road dust sampled from expressways, arterial roads and local roads in Toronto, Canada. The fine particle fractions (<1.8 µm) of all the studied samples accounted for 51–72% of the resuspended PM<sub>10</sub> (by weight). Elemental analysis using ICP-MS and ICP-OES revealed an overall trend of element enrichment in the <1.8 µm fraction compared to the coarse fraction (1.8–10 µm) of the road dust. By contrast, archived house dust samples displayed the reverse trend for most elements. The lung bioaccessibility of target elements (Al, B, Ba, Co, Cr, Fe, La, Mn, Mo, Sb, Sr, Ti, V and Zn) was assessed for each road dust fraction using 0.1 M ammonium citrate (pH 4.4) to simulate intracellular fluid and Gamble solution (pH 7.2) to simulate interstitial lung fluid. The <1.8 µm fraction of local road dust displayed significantly higher bioaccessibility (<i>p</i> < 0.05) for Zn when using Gamble solution, and for seven out of the 14 target elements when using ammonium citrate. These results show the importance of characterizing the fine fraction of road dust. |
| first_indexed | 2024-03-09T00:53:28Z |
| format | Article |
| id | doaj.art-59df9bc4dab149de810dd92a5f0eaadd |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-03-09T00:53:28Z |
| publishDate | 2021-02-01 |
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| series | Geosciences |
| spelling | doaj.art-59df9bc4dab149de810dd92a5f0eaadd2023-12-11T17:00:44ZengMDPI AGGeosciences2076-32632021-02-011128710.3390/geosciences11020087Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung BioaccessibilityChristine Levesque0Clare L. S. Wiseman1Suzanne Beauchemin2Pat E. Rasmussen3Exposure and Biomonitoring Division, Environmental Health Science and Research Bureau, HECS Branch, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, CanadaSchool of the Environment, University of Toronto, Toronto, ON M5S 3E8, CanadaExposure and Biomonitoring Division, Environmental Health Science and Research Bureau, HECS Branch, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, CanadaExposure and Biomonitoring Division, Environmental Health Science and Research Bureau, HECS Branch, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, ON K1A 0K9, CanadaA fluidized bed aerosol generator was connected to a 13-stage cascade impactor (nanoMOUDI) for the size fractionation of urban dust (<10 µm), followed by the gravimetric analysis of loaded PTFE filter samples. This method was used to characterize the PM<sub>10</sub> (thoracic) fraction of road dust sampled from expressways, arterial roads and local roads in Toronto, Canada. The fine particle fractions (<1.8 µm) of all the studied samples accounted for 51–72% of the resuspended PM<sub>10</sub> (by weight). Elemental analysis using ICP-MS and ICP-OES revealed an overall trend of element enrichment in the <1.8 µm fraction compared to the coarse fraction (1.8–10 µm) of the road dust. By contrast, archived house dust samples displayed the reverse trend for most elements. The lung bioaccessibility of target elements (Al, B, Ba, Co, Cr, Fe, La, Mn, Mo, Sb, Sr, Ti, V and Zn) was assessed for each road dust fraction using 0.1 M ammonium citrate (pH 4.4) to simulate intracellular fluid and Gamble solution (pH 7.2) to simulate interstitial lung fluid. The <1.8 µm fraction of local road dust displayed significantly higher bioaccessibility (<i>p</i> < 0.05) for Zn when using Gamble solution, and for seven out of the 14 target elements when using ammonium citrate. These results show the importance of characterizing the fine fraction of road dust.https://www.mdpi.com/2076-3263/11/2/87inhalation exposureairborne particulate matterPM<sub>2</sub>.<sub>5</sub>PM mass distributionmetal solubilitystreet dust |
| spellingShingle | Christine Levesque Clare L. S. Wiseman Suzanne Beauchemin Pat E. Rasmussen Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility Geosciences inhalation exposure airborne particulate matter PM<sub>2</sub>.<sub>5</sub> PM mass distribution metal solubility street dust |
| title | Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility |
| title_full | Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility |
| title_fullStr | Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility |
| title_full_unstemmed | Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility |
| title_short | Thoracic Fraction (PM<sub>10</sub>) of Resuspended Urban Dust: Geochemistry, Particle Size Distribution and Lung Bioaccessibility |
| title_sort | thoracic fraction pm sub 10 sub of resuspended urban dust geochemistry particle size distribution and lung bioaccessibility |
| topic | inhalation exposure airborne particulate matter PM<sub>2</sub>.<sub>5</sub> PM mass distribution metal solubility street dust |
| url | https://www.mdpi.com/2076-3263/11/2/87 |
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