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Analytical challenges and possibilities for the quantification of tire-road wear particles
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This review examines the analytical challenges involved in measuring tire-road wear particles, one of the largest sources of microplastic emissions. Researchers cataloged the wide range of methods used to detect and quantify these particles, noting that their varied size, shape, density, and chemical makeup make consistent measurement difficult. The study highlights the need for standardized analytical approaches so that results from different studies can be meaningfully compared.
As one of the largest sources of microplastic particle emissions, tire-road wear particle mixtures (TRWPs) pose a potentially high threat to various environmental compartments. Their heterogenous properties, from varying particle size, density, shape, texture, elemental and chemical composition, cause challenging analytical workflows. Current analytical methods for TRWP can be summarized in two main groups: single-particle-based and bulk-based methods. Both groups include a large variation of methods, with different demands for sampling and sample pre-treatment, and different possible outputs. This review provides an overview of the current analytical methods used for TRWP studies and in particularly quantifications, with focus on methods that have been peer-reviewed and tested for environmental samples. The review presents current possibilities and limitations with the different analytical approaches, as well as highlighting gaps in the current TRWP knowledge and information needed to move this research field forward.
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Chemical tracers for assessing the contribution of tire wear particles in atmospheric aerosol: analytical approaches, challenges and future perspectives
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Every time your car's tires grip the road, they shed tiny plastic particles that become part of the air pollution you breathe, and this can account for more air pollution than what comes out of your tailpipe. This review paper looks at the scientific methods used to detect these tire particles in air pollution and finds that there's currently no reliable single test for them, meaning scientists still need better tools to figure out exactly how much of the air we breathe contains this tire-derived microplastic pollution and its associated chemicals. This matters because until we can accurately measure it, it's hard to fully assess the health risks these particles and their leaching chemicals may pose.
Tire Wear and Pollutants: An Overview of Research
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This review provides an overview of tire road and wear particles as a major source of microplastic emissions, examining both experimental and mathematical approaches to measuring tire wear. The study notes that while tire wear particles are found in alarming amounts across various environments, they remain less studied than other microplastics, and calls for more accurate simulation models to predict tire wear emissions.
Tire Wear Particle Emissions: A Review of Measurement Approaches and Impact on Reported Results
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Every time a car's tires roll down the road, they shed tiny particles—including microplastics—into the air we breathe, but this review of existing research finds that scientists don't yet agree on how to accurately measure this pollution. Different labs testing the same tires get wildly different results depending on their methods, which means we still don't have a clear, reliable picture of how much of this particle pollution we're actually exposed to. Until measurement methods are standardized, it's hard to know the true health risks from tire pollution—a problem worth solving given how much time people spend near roads.
Challenges in Quantifying Tire Wear Particle Emissions on an Outer Drum Test Bed
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Researchers worked to develop reliable methods for measuring tire wear particle emissions on an outer drum test bed, a key challenge since tire wear is a major source of microplastics. They found that a degumming method using talcum powder increased wear rates to realistic levels but complicated particle measurements, requiring new techniques to distinguish tire particles from the powder. The study highlights the technical difficulties involved in accurately quantifying tire wear emissions for environmental assessment.
Quantification of tire wear particles in road dust based on synthetic/natural rubber ratio using pyrolysis-gas chromatography–mass spectrometry across diverse tire types
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Researchers developed an improved method for measuring tire wear particles in road dust that accounts for differences in rubber composition across tire brands and types. They found that the standard ISO method, which assumes a fixed ratio of synthetic to natural rubber, can significantly misestimate tire wear concentrations. The refined approach provides more accurate measurements of this major source of microplastic pollution from road traffic.
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