Abstract

Various wear particles generated on roads are dispersed by traffic, with repeated scattering caused by continuous vehicle movement. In contrast, road dust deposited on snowbanks remains immobilized, preventing further resuspension. In this study, road dust deposited on snow during winters and transferred from wet roads was collected to obtain samples transferred by single-step scattering. The tire wear particle (TWP) content was analyzed as a function of particle size. Rubber components were identified in samples smaller than 212 μm : the styrene–butadiene rubber (SBR) content increased with decreasing particle size, whereas the natural rubber (NR) and butadiene rubber (BR) contents decreased. SBR was the predominant component in all samples, indicating that TWPs from passenger cars were more prevalent than those from buses or trucks. The TWP content ranged from 0.45% to 0.57%, which was lower than the values typically reported under dry road conditions.

Keywords: tire-road wear particle;road dust;transfer;snow;Py-GC/MS