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Tire crumb in the environment: a review on occurrence, fate and recent advances in detection and analysis
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This review provides a comprehensive assessment of tire wear particles as environmental contaminants, covering their physical and chemical properties, occurrence across environmental matrices, and detection methods. Researchers found that tire wear particles are present in air, water, and soil worldwide but remain difficult to quantify due to their variable density, aging behavior, and lack of standardized detection protocols. The study highlights the urgent need for consistent analytical methods to better understand how these particles move through and impact the environment.
Tire wear particles (TWPs) are increasingly recognised as a contaminant of emerging concern, owing to their toxic and omnipresent nature. Given these characteristics, it is imperative to discuss their occurrence and fate across different environmental matrices and critically examine the current state-of-the-art technologies utilised for their sampling, detection and analysis. This review provides a comprehensive overview of the physicochemical characteristics of TWPs, their occurrence, environmental fate, and detection methodologies. It further investigates the dominant methodological bottlenecks in the detection and quantification of TWPs across different environmental matrices, highlighting key challenges in their atmospheric and waterborne cycling, including inconsistent emission estimates, a lack of standardised protocols, and a limited understanding of transport and transformation processes. Our findings revealed that TWPs are ubiquitous across all environmental matrices; however, their transport and transformation remain poorly constrained due to variable density, aggregation, ageing and additive leaching behaviour, all of which complicate modelling efforts. In addition, we also concluded that despite rapid progress in spectroscopic, thermal and mass-based approaches, there remains no standardised, matrix-independent method potent enough for achieving simultaneous chemical specificity, particle-scale resolution, and quantitative recovery. Such findings emphasise the urgent need for harmonised analytical workflows and integrative studies linking physicochemical properties to environmental mobility and toxicity. This review thus establishes a conceptual framework for bridging analytical advances with environmental process understanding, an essential step towards reliable risk evaluation of tire-derived microplastics. It further offers essential insights to researchers, policymakers, and environmental professionals determined to better comprehend and alleviate the effects of tire wear particles on ecosystems and human health.
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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.
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.
The emission characteristics, environmental and health impacts of tire wear particles: A review
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This review summarizes existing research on tiny particles worn off tires, which range from coarse dust to invisible nanoparticles. It describes how these particles spread through air, soil and water, affect soil chemistry and harm aquatic life, and cause lung inflammation and cell damage in laboratory studies, though direct evidence of harm to human health remains limited.
Tire wear particles in the marine environment: sources, migration, ecological risk and control strategy
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Researchers reviewed the environmental fate of tire wear particles (TWPs) in marine systems, tracing their transport from road surfaces via atmospheric deposition and hydrological flow into seawater, sediments, and marine food webs, and evaluating emerging control strategies including green material engineering and standardized monitoring protocols.
Waste Tire Composition and Environmental Impacts: a Systematic Review of Chemical Constituents, Release Pathways, and Pollution Risks
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This review of 30 studies shows that worn tires release tiny particles, chemicals, and microplastics into air, water, and soil, some of which are known health hazards. As these particles are already turning up in the environment, understanding how they spread matters for reducing our exposure. The researchers also point to recycling methods that could help cut this pollution.
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