Source apportionment of magnetite particles in roadside airborne particulate matter
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27690%2F21%3A10246420" target="_blank" >RIV/61989100:27690/21:10246420 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0048969720353572" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0048969720353572</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.scitotenv.2020.141828" target="_blank" >10.1016/j.scitotenv.2020.141828</a>
Alternative languages
Result language
angličtina
Original language name
Source apportionment of magnetite particles in roadside airborne particulate matter
Original language description
Exposure to airborne particulate matter (PM) is associated with pulmonary, cardiovascular and neurological problems. Magnetite, a mixed Fe2+/Fe3+ oxide, is ubiquitous and abundant in PM in urban environments, and might play a specific role in both neurodegeneration and cardiovascular disease. We collected samples of vehicle exhaust emissions, and of heavily-trafficked roadside and urban background dusts from Lancaster and Birmingham, U.K. Then, we measured their saturation magnetic remanence and used magnetic component analysis to separate the magnetite signal from other contributing magnetic components. Lastly, we estimated the contributions made by specific traffic-related sources of magnetite to the total airborne magnetite in the roadside environment. The concentration of magnetite in exhaust emissions is much lower (3-14 x lower) than that in heavily-trafficked roadside PM. The magnetite concentration in petrol-engine exhaust emissions is between similar to 0.06 and 0.12 wt%; in diesel-engine exhaust emissions similar to 0.08-0.18 wt%; in background dust similar to 0.05-0.20 wt% and in roadside dust similar to 0.18-0.95 wt%. Here, we show that vehicle brake wear is responsible for between similar to 68 and 85% of the total airborne magnetite at the two U.K. roadside sites. In comparison, diesel-engine exhaust emissions account for similar to 7% - 12%, petrol-engine exhaust emissions for similar to 2% - 4%, and background dust for 6% - 10%. Thus, vehicle brake wear is by far the most dominant source of airborne magnetite in the roadside environment at the two sites examined. Given the potential risk posed, post-inhalation, by ultrafine magnetite and co-associated transition metal-rich particles to human cardiovascular and neurological health, the high magnetite content of vehicle brake wear might need to be reduced in order to mitigate such risk, especially for vulnerable population groups. (C) 2020 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Science of the Total Environment
ISSN
0048-9697
e-ISSN
1879-1026
Volume of the periodical
752
Issue of the periodical within the volume
21.8.2020
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
nestrankovano
UT code for WoS article
000588243900048
EID of the result in the Scopus database
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