Quantifying and Characterising Nanoparticle Emissions from Tyre and Road Wear Emissions

MOLLY J. HAUGEN, Adam M Boies, University of Cambridge

     Abstract Number: 669
     Working Group: Urban Aerosols

Abstract
On-road emissions are becoming dominated by tire and road wear emissions, creating a growing concern for non-combustion vehicles. The University of Cambridge is investigating online and offline tire and road wear particles (TRWPs) generated in laboratory settings, yet simulating real-world driving conditions, such as temperature, road surface, loads, and drive cycles. This work uses an ELPI+ (Dekati), a Catalytic Stripper (Catalytic Instruments), and a high-flow impactor (TSI Inc.) The results from this work allow the aerosol community to assess the key particle characteristics that must be maintained for for TRWPs used in toxicity and health studies.

Additionally, third body particles, an external source of particles, simulate real-world driving conditions further for laboratory settings and were optimised for nanoparticle assessment. Differentiating between third body particles and generated TRWPs is crucial for characterizing nanoparticles in real-world environments yet a difficult challenge and thus a main focus of this work. Here, a method to evaluate background nanoparticle concentration was determined, as well as individual assessment of the third body particles. It was also shown that managing legacy particles within laboratory settings will be key in TRWP emission testing and analysis.