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The transport of tyre wear particles in rivers, with a focus on settling and resuspension
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Researchers investigated the transport, settling, and resuspension behavior of tyre and road wear particles (TRWPs) in river systems compared to conventional microplastics, presenting initial characterization data on TRWP density and zeta potential and conducting mesocosm flume experiments to test hypotheses about their differential environmental fate.
There is increasing research into Tyre and Road Wear Particles (TRWPs), including quantifying their generation, environmental sampling and the development of methods to better extract and analyse these samples. However, there is currently a lack of research which looks into the fate and transport of these particles through pathways in the environment, and no research which looks to find or quantify these particles in groundwater. This research investigates how TRWPs are transported through the environment and in aquatic ecosystems, with a particular focus on settling and resuspension in rivers, in comparison with more extensively studied, 'traditional', microplastics. There are few published studies which perform standard density characterisation on TRWPs. As such, we present initial characterisation data of TRWP density, zeta potential and heavy metal concentration, determined using gas pycnometry, a DLS zetasizer and ICP-MS. We also present data from research on tyre wear content in bioswales, and of the settling and dispersion rates of tyre wear particles in a stationary, settled system. These settling rates were conducted in a settling box and show the effects of interaction between multiple particles on their settling. These settling experiments in a settling box lead on to mesocosm flume experiments which will be conducted to show settling and resuspension rates of tyre wear particles in comparison with more 'traditional' microplastics. This will test our hypothesis that, due to their unique characteristics, the transport of TRWPs through catchments cannot be predicted using models developed for 'traditional' MPs. We present the methodology for these flume experiments and the subsequent analysis. Also see: https://micro2024.sciencesconf.org/558833/document
More Papers Like This
The transport of tyre wear particles in rivers, with a focus on settling and resuspension
AI summary Read the abstract
Researchers investigated the transport dynamics of tyre and road wear particles (TRWPs) in river systems, with particular focus on settling and resuspension processes in aquatic environments, and explored pathways toward groundwater, addressing a gap in understanding TRWP fate in the environment.
Settling Velocities of Tire and Road Wear Particles: Analyzing Finely Graded Density Fractions of Samples from a Road Simulator and a Highway Tunnel.
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Researchers measured the terminal settling velocities of tyre and road wear particles (TRWP) from a road simulator and highway tunnel across different density and size fractions, providing the first empirical settling velocity data for these particles to support modeling of their transport in aquatic environments.
Review: Micro- and macro-scale transport of tire wear particles in aquatic environments and risk control
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Every time tires wear down on roads, they shed tiny plastic-like particles that eventually wash into rivers, lakes, and oceans. This review pulls together existing research on how these particles settle, travel, and build up in water — a key step in understanding where they end up and how they might affect aquatic life and, potentially, the food and water humans rely on. While it doesn't test new health effects, it lays the groundwork for figuring out how to reduce this widespread but often overlooked source of microplastic pollution.
Relevance of tyre wear particles to the total content of microplastics transported by runoff in a high-imperviousness and intense vehicle traffic urban area.
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Researchers characterized microplastics and tire wear particles (TWPs) transported by urban stormwater runoff in a highly impervious catchment, finding that TWPs made up a substantial fraction of the total microplastic load in sediments of a stormwater detention reservoir. The study underscores the contribution of road traffic to microplastic pollution entering waterways.
Tire wear particles in different water environments: occurrence, behavior, and biological effects—a review and perspectives
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This review examines tire wear particles, a major but often overlooked source of microplastics in water environments. Tire particles release toxic chemicals as they break down in water and can harm aquatic organisms, but most research has focused only on the chemical leachate rather than the particles themselves. Since tire wear contributes a large share of total microplastic pollution, understanding its full impact on water ecosystems and the food chain is important for human health.
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