Gaseous emissions from brake wear can form secondary particulate matter.
Air quality
Brake wear
Non-exhaust emissions
Oxidation flow reactor
Secondary particle formation
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
06 Oct 2024
06 Oct 2024
Historique:
received:
16
06
2024
accepted:
24
09
2024
medline:
7
10
2024
pubmed:
7
10
2024
entrez:
6
10
2024
Statut:
epublish
Résumé
Road traffic is an important source of urban air pollutants. Due to increasingly strict controls of exhaust emissions from road traffic, their contribution to the total emissions has strongly decreased over time in high-income countries. In contrast, non-exhaust emissions from road vehicles are not yet legislated and now make up the major proportion of road traffic emissions in many countries. Brake wear, which occurs due to friction between brake linings and their rotating counterpart, is one of the main non-exhaust sources contributing to particle emissions. Since the focus of brake wear emission has largely been on particulate pollutants, little is currently known about gaseous emissions such as volatile organic compounds from braking and their fate in the atmosphere. This study investigates the oxidative ageing of gaseous brake wear emissions generated with a pin-on-disc tribometer, using an oxidation flow reactor. The results demonstrate, for the first time, that the photooxidation of gaseous brake wear emissions can lead to formation of secondary particulate matter, which could amplify the environmental impact of brake wear emissions.
Identifiants
pubmed: 39370421
doi: 10.1038/s41598-024-74378-5
pii: 10.1038/s41598-024-74378-5
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
23253Informations de copyright
© 2024. The Author(s).
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