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Characterization of tire wear particle emissions from different-mileage passenger cars
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NETL
NSTL
Elsevier
Tire wear particles (TWPs) generated from vehicular sources significantly contribute to urban air pollution and pose risks to human health. To investigate the emission behavior of TWPs, chassis dynamometer driving tests were conducted on different-mileage vehicles. The results revealed that tire wear mileage increase led to decreased particle number emission for 10-500 nm TWPs and a gradual increase in particle mass emission. The long-mileage tires result in the formation of lumpy particles with fibrous structures. Tires with varying mileage produce lumpy particles and agglomerated irregular particles. Characteristic elements from the tire material are uniformly distributed on the lumpy particles. The agglomerated irregular particles mainly contain C and O and are not uniformly distributed with other characteristic elements. In addition, tire surface material from shortmilage vehicles reduces more mass than long-milage vehicles under low thermogravimetric analysis temperatures. The lost material is mainly oxidized to CO2 gas. Wear over long mileages can lead to changes in the organic substances of tire surface material. The discussion of mileage impact provides data to support the assessment and control of particle emissions over the full life cycle of tires.
NETL
NSTL
Elsevier
