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61,005 resultsShowing papers similar to Seasonal variation in characteristics of wear microparticles of high density (> 1.8 g cm−3) produced on road
ClearThe transport of tyre wear particles in rivers, with a focus on settling and resuspension
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.
Classification and Characterization of Tire-Road Wear Particles in Road Dust by Density
Tire-road wear particles were classified and characterized by density using road dust from an asphalt pavement, allowing separation of tire tread-derived particles from road surface and mineral components. The density-based classification approach improves the accuracy of tire wear particle quantification in environmental monitoring studies.
Settling Velocities of Tire and Road Wear Particles: Analyzing Finely Graded Density Fractions of Samples from a Road Simulator and a Highway Tunnel.
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.
Tyre and road wear particles from source to sea
Researchers traced tyre and road wear particles (TRWP) — tiny rubber fragments shed when vehicles brake and turn — from urban roads into marine sediments, finding that softer tyres with more natural rubber shed more particles and that TRWP concentrations drop sharply with distance from cities. Unlike lighter microplastics that drift widely, TRWP sink quickly and accumulate near urban coastlines, threatening nearshore sediment ecosystems.
The transport of tyre wear particles in rivers, with a focus on settling and resuspension
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.
Mitigation of Suspendable Road Dust in a Subpolar, Oceanic Climate
Tire and road wear particles (TRWP), a major source of microplastics in waterways, are especially abundant in cold climates where studded tires are common. This study assessed road dust generation and found that traffic volume and road surface conditions are key drivers of TRWP pollution.
Microplastic and tyre wear particles at a highway: a case study from Norway
Researchers monitored microplastics and tire wear particles (tiny rubber fragments shed by vehicles) in air, road runoff, and road dust along a busy Norwegian highway, finding the highest concentrations in road dust and the lowest in air. The study demonstrates that traffic is a major source of microplastic pollution across multiple environmental pathways.
Types and concentrations of tire wear particles (TWPs) in road dust generated in slow lanes.
Road dust samples collected near traffic lights contained tire wear particles (TWPs), with the concentration and size distribution varying by location and traffic direction. Tire wear is one of the largest sources of microplastic pollution in urban environments, and these particles are carried into waterways by stormwater runoff.
Identification, classification and quantification of microplastics in road dust and stormwater
Researchers identified and quantified microplastics in road dust and stormwater, finding significantly higher concentrations in industrial areas compared to residential zones, with tire wear particles and polyethylene fragments being the most common types.
Characterization of tire and road wear particles in urban river samples
Tire and road wear particles in urban river sediments from the Seine River were characterized using density separation and chemical mapping methods, finding average particle sizes of 133-250 microns with TRWP concentrations of up to 930 mg/kg dry sediment downstream of the Rouen urban area.
An Experimental Study on the Component Analysis and Variation in Concentration of Tire and Road Wear Particles Collected from the Roadside
Researchers analyzed the concentration and composition of tire and road wear particles (TRWPs) collected from roadsides during summer and winter in Korea. The study found seasonal variations in TRWP concentrations related to temperature differences, highlighting the need for strategies to reduce these particles as vehicle registrations continue to increase.
Microplastics in road dust – characteristics, pathways and measures
Researchers reviewed the sources, characteristics, and transport pathways of road dust-associated microplastic particles (RAMP), identifying tyre wear rubber, polymer-modified bitumen, and thermoplastic road marking paints as the main contributors. The study found significant data gaps regarding the fate of RAMP in stormwater runoff and wastewater treatment systems.
Characteristics of Vehicle Tire and Road Wear Particles’ Size Distribution and Influencing Factors Examined via Laboratory Test
Researchers conducted laboratory tests to characterize the size distribution of tire and road wear particles under various conditions. The study found that factors such as driving speed, tire composition, and road surface characteristics significantly influence the size and quantity of wear particles released, which are a growing source of microplastic pollution.
Occurrence of tire and bitumen wear microplastics on urban streets and in sweepsand and washwater
Tire tread wear and bitumen particles were the dominant anthropogenic microplastics found on urban roads and in sweeping waste and stormwater in a Norwegian study, with concentrations up to 2,561 particles per liter in road dust samples. Street sweeping removed significant quantities of these particles, and sodium iodide density separation proved effective for their analytical isolation.
Characterization of Particles in Road Surface Sediments for Analyzing Runoff Behavior of Microplastics
Researchers characterized physical properties — density, shape, and material composition — of particles in road surface sediments and stormwater catchpit deposits in Japan using density-gradient separation, image analysis, and ATR-FTIR, finding that synthetic polymers comprised 40-50% of all particles and were concentrated in high-density fractions with Feret diameters of 500-800 micrometers.
Tyre wear particles: an abundant yet widely unreported microplastic?
Researchers collected tire wear particles from roadside drains and natural environments near a major UK road, finding that these particles are abundant and widespread yet frequently undetected in environmental monitoring, suggesting tyre wear is a major but under-reported microplastic source.
Tyre and road wear particles - A calculation of generation, transport and release to water and soil with special regard to German roads
This study calculated that German roads generate 75,000 to 98,000 tons of tire and road wear particles annually, with a significant portion reaching surface waters and roadside soils. The findings highlight tire wear as a major but often overlooked source of microplastic pollution requiring better data and management strategies.
Concentration of Microplastics in Road Dust as a Function of the Drying Period—A Case Study in G City, Korea
Microplastic concentrations in road dust were measured as a function of dry weather duration in a Korean city, finding that plastic levels increased with longer drying periods and were dominated by tire wear and road marking particles. The results suggest that dry periods followed by rainfall events create pulses of microplastic runoff from road surfaces.
Concentrations of tire wear microplastics and other traffic-derived non-exhaust particles in the road environment
Researchers measured actual environmental concentrations of tire wear microplastics and other traffic-derived non-exhaust particles in a rural highway setting, providing field-based data to complement the theoretical estimates that dominate current literature.
Analysis of TRWP Particle Distribution in Urban and Suburban Landscapes, Connecting Real Road Measurements with Particle Distribution Simulation
Researchers combined road-based tyre and road wear particle emission sampling with particle distribution simulations at a high-traffic urban intersection, finding that TRWP concentrations correlated with vehicle dynamics such as braking and acceleration, and that air humidity and dust resuspension significantly influenced particle measurements in the field.
Characterization of Airborne Microplastics Particles on Urban Roads: Types, Sizes, and Total Particles
Researchers collected airborne microplastic samples from urban road environments and characterized particle types, sizes, color distributions, and polymer compositions, finding tire-wear rubber and paint fragments alongside fiber and film fragments from packaging and textiles.
Assessment of fine and coarse tyre wear particles along a highway stormwater system and in receiving waters: Occurrence and transport
Researchers tracked tire wear particles through a highway stormwater drainage system in Sweden and found contamination at nearly every sampling point, with concentrations reaching up to 17 milligrams per liter in water. A significant portion of the particles were very small, in the 1.6 to 20 micrometer range, which are harder to filter out and more likely to travel long distances. The study highlights that tire wear is a major and often overlooked source of microplastic pollution reaching waterways.
Traffic Intensity as a Factor Influencing Microplastic and Tire Wear Particle Pollution in Snow Accumulated on Urban Roads
A study in a medium-sized Polish city found microplastics and tire wear particles at all 53 road sites examined, with concentrations in road snow scaling strongly with traffic volume — from roughly 62 particles per liter on quiet streets to nearly 793 on heavy-traffic roads. Snow acts as a temporary reservoir, concentrating these particles through winter before releasing them in large pulses into rivers and streams during spring melt. The findings suggest that reducing traffic speeds, sweeping roads regularly, and installing stormwater filters are practical measures to limit urban microplastic runoff.
Deposition of Roadside Atmospheric Non-Tire Wear Microplastics: Characteristics and Influencing Factors
A year-long roadside study measured the atmospheric deposition of microplastics in two size fractions, finding deposition rates of 3–9 million particles per hectare per month for larger particles and identifying polymers including PP, PE, PS, PVC, PET, and nylon. Traffic was the dominant source of larger particles near the road, while wind patterns dispersed smaller particles more broadly from industrial sources. Roads are a major but underappreciated source of airborne microplastic deposition into surrounding soils and waterways, and this study quantifies that contribution with new precision.