Tire particles are generated by the abrasion of tire treads on roads and are major contributors to microplastics in soil environments. Contamination by tire wear particles worsens annually as the use of personal mobilities increases. Tire particles (112–541 µm) were obtained from three types of personal mobility tires (bicycle, car, and electric scooter) and exposed to plants (Vigna radiata) and springtails (Folsomia candida) for 28 d to assess the toxicity of each tire-particle type. The laboratory-generated tire particles exhibit adverse effects depending on the origin of the tire or test species. Particles from bicycle or electric-scooter tires changed the soil’s bulk density and water holding capacity and adversely affected plant growth. Car tire particles had leached various organic compounds and induced detrimental effects on springtails (adult and offspring growth). We concluded that laboratory-generated tire particles (frow new tires) can affect the soil environment by changing soil properties and leaching chemicals; thus, causing adverse effects on soil organisms. Since this study found tire particle toxicity on soil organisms, it would be possible to compare the various contamination levels in areas near road soil and other clean soils.

轮胎颗粒是由轮胎胎面在道路上的磨损产生的，是土壤环境中微塑料的主要贡献者。随着个人机动性的增加，轮胎磨损颗粒造成的污染每年都在恶化。轮胎颗粒 (112–541 µm) 从三种类型的个人移动轮胎（自行车、汽车和电动滑板车）中获得，并暴露于植物 ( Vigna radiata ) 和弹尾草 ( Folsomia candida )) 28 天，以评估每种轮胎颗粒类型的毒性。实验室生成的轮胎颗粒表现出不利影响，具体取决于轮胎或测试品种的来源。来自自行车或电动滑板车轮胎的颗粒改变了土壤的容重和持水能力，并对植物生长产生不利影响。汽车轮胎颗粒会浸出各种有机化合物，并对弹尾（成年和后代的生长）产生不利影响。我们得出的结论是，实验室产生的轮胎颗粒（新轮胎）可以通过改变土壤性质和浸出化学物质来影响土壤环境；因此，对土壤生物造成不利影响。由于这项研究发现了轮胎颗粒对土壤生物的毒性，因此可以比较道路土壤和其他清洁土壤附近区域的各种污染水平。