Abstract
Road dust is an important source of resuspended particulate matter (PM) but information is lacking on the chemical composition of the ultrafine particle fraction (UFP; <0.1 µm). This study investigated metal concentrations in UFP isolated from the “dust box” of sweepings collected by the City of Toronto, Canada, using regenerative-air-street sweepers. Dust box samples from expressway, arterial and local roads were aerosolized in the laboratory and were separated into thirteen particle size fractions ranging from 10 nm to 10 µm (PM10). The UFP fraction accounted for about 2% of the total mass of resuspended PM10 (range 0.23–8.36%). Elemental analysis using ICP-MS and ICP-OES revealed a marked enrichment in Cd, Cr, Zn and V concentration in UFP compared to the dust box material (nano to dust box ratio ≥ 2). UFP from arterial roads contained two times more Cd, Zn and V and nine times more Cr than UFP from local roads. The highest median concentration of Zn was observed for the municipal expressway, attributed to greater volumes of traffic, including light to heavy duty vehicles, and higher speeds. The observed elevated concentrations of transition metals in UFP are a human health concern, given their potential to cause oxidative stress in lung cells.
Funder
Natural Sciences and Engineering Research Council
Health Canada
Subject
Atmospheric Science,Environmental Science (miscellaneous)
Reference75 articles.
1. Preventing Disease through Healthy Environments: A Global Assessment of the Burden of Disease from Environmental Risks,2016
2. Ambient Air Pollution: A Global Assessment of Exposure and Burden of Disease,2016
3. Thoracic and respirable particle definitions for human health risk assessment
4. Deposition and biokinetics of inhaled nanoparticles
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
1. Overall distribution of tire-wear particles, nano‑carbon black, and heavy metals in size-fractionated road dust collected from steel industrial complexes;Science of The Total Environment;2023-08
2. Review on main sources and impacts of urban ultrafine particles: Traffic emissions, nucleation, and climate modulation;Atmospheric Environment: X;2023-08
3. Ambient ultrafine particle (PM0.1): Sources, characteristics, measurements and exposure implications on human health;Environmental Research;2023-02
4. Pollution Characteristics, Source Apportionment, and Health Risk Assessment of Potentially Toxic Elements (PTEs) in Road Dust Samples in Jiayuguan, Hexi Corridor, China;Toxics;2022-09-30
5. ОЦЕНКА СОДЕРЖАНИЯ ХИМИЧЕСКИХ ЭЛЕМЕНТОВ В КОМПОНЕНТАХ ПРИРОДНОЙ СРЕДЫ «ВОСТОЧНОГО» СЛЕДА РАДИОАКТИВНЫХ ВЫПАДЕНИЙ СЕМИПАЛАТИНСКОГО ИСПЫТАТЕЛЬНОГО ПОЛИГОНА;Bulletin of the Tomsk Polytechnic University Geo Assets Engineering;2022-09-15