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Differentiating and Quantifying Carbonaceous (Tire, Bitumen, and Road Marking Wear) and Non-carbonaceous (Metals, Minerals, and Glass Beads) Non-exhaust Particles in Road Dust Samples from a Traffic Environment

Water Air & Soil Pollution 2022 46 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Yvonne Andersson‐Sköld Ida Järlskog, Ida Järlskog, Ida Järlskog, Ida Järlskog, Ida Järlskog, Yvonne Andersson‐Sköld Ida Järlskog, David Jaramillo‐Vogel, David Jaramillo‐Vogel, Ann‐Margret Strömvall, Ann‐Margret Strömvall, David Jaramillo‐Vogel, David Jaramillo‐Vogel, Ida Järlskog, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Mats Gustafsson, Mats Gustafsson, Ann‐Margret Strömvall, Ann‐Margret Strömvall, David Jaramillo‐Vogel, Ann‐Margret Strömvall, Juanita Rausch, Juanita Rausch, Ann‐Margret Strömvall, Juanita Rausch, Mats Gustafsson, Mats Gustafsson, David Jaramillo‐Vogel, Mats Gustafsson, Mats Gustafsson, Juanita Rausch, Juanita Rausch, Juanita Rausch, Yvonne Andersson‐Sköld Mats Gustafsson, Yvonne Andersson‐Sköld Ann‐Margret Strömvall, Mats Gustafsson, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Sébastien Perseguers, Ann‐Margret Strömvall, Ida Järlskog, Ida Järlskog, Mats Gustafsson, Mats Gustafsson, Ida Järlskog, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Yvonne Andersson‐Sköld Mats Gustafsson, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Mats Gustafsson, Yvonne Andersson‐Sköld Juanita Rausch, Ann‐Margret Strömvall, Yvonne Andersson‐Sköld Yvonne Andersson‐Sköld Ann‐Margret Strömvall, Mats Gustafsson, Ann‐Margret Strömvall, Ann‐Margret Strömvall, Juanita Rausch, Mats Gustafsson, Ann‐Margret Strömvall, David Jaramillo‐Vogel, Mats Gustafsson, Juanita Rausch, Yvonne Andersson‐Sköld Ann‐Margret Strömvall, Ann‐Margret Strömvall, Juanita Rausch, David Jaramillo‐Vogel, Ann‐Margret Strömvall, Yvonne Andersson‐Sköld Yvonne Andersson‐Sköld Yvonne Andersson‐Sköld Ida Järlskog, Mats Gustafsson, Yvonne Andersson‐Sköld

Summary

Researchers used automated electron microscopy combined with machine learning to identify and count different types of microplastic and wear particles in road dust, finding that tire and bitumen wear particles made up about 19-22% of particles in traffic environments. The method provides a fast, non-destructive way to quantify the types of traffic-generated microplastics polluting urban environments.

Abstract Tires, bitumen, and road markings are important sources of traffic-derived carbonaceous wear particles and microplastic (MP) pollution. In this study, we further developed a machine-learning algorithm coupled to an automated scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX) analytical approach to classify and quantify the relative number of the following subclasses contained in environmental road dust: tire wear particles (TWP), bitumen wear particles (BiWP), road markings, reflecting glass beads, metallics, minerals, and biogenic/organics. The method is non-destructive, rapid, repeatable, and enables information about the size, shape, and elemental composition of particles 2–125 µm. The results showed that the method enabled differentiation between TWP and BiWP for particles > 20 µm with satisfying results. Furthermore, the relative number concentration of the subclasses was similar in both analyzed size fractions (2–20 µm and 20–125 µm), with minerals as the most dominant subclass (2–20 µm x̄ = 78%, 20–125 µm x̄ = 74%) followed by tire and bitumen wear particles, TBiWP, (2–20 µm x̄ = 19%, 20–125 µm x̄ = 22%). Road marking wear, glass beads, and metal wear contributed to x̄ = 1%, x̄ = 0.1%, and x̄ = 1% in the 2–20-µm fraction and to x̄ = 0.5%, x̄ = 0.2%, and x̄ = 0.4% in the 20–125-µm fraction. The present results show that road dust appreciably consists of TWP and BiWP within both the coarse and the fine size fraction. The study delivers quantitative evidence of the importance of tires, bitumen, road marking, and glass beads besides minerals and metals to wear particles and MP pollution in traffic environments based on environmental (real-world) samples

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