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Ecotoxicology of micronized tire rubber: Past, present and future considerations
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This review synthesizes what is known about the ecotoxicology of micronized tire rubber particles, which are increasingly identified as a significant fraction of environmental microplastics, examining their effects on aquatic and terrestrial organisms. The authors note that tire rubber contains a complex mixture of chemical additives that may drive toxicity beyond the physical effects of the particles themselves.
Micronized tire rubber has recently come into focus as black particles that are found in microplastic (MP) samples worldwide. These particles have been found in all environmental compartments with the most likely source being the abrasion of car tires on road surfaces. Thus, it is well founded that tires are a source of MPs and that tire abrasion is a primary source of anthropogenic particulates. Currently, the impact of tires has been viewed through the lens of particulate pollution together with MPs, but this is a relatively new direction for this topic. Previously ecotoxicological research into the environmental consequences of tires has primarily been related to the leached chemicals from tire particulates. This paper aims to (i) highlight similarities and differences of micronized rubber particles with the existing suite of polymer contaminants termed as 'microplastics' or 'plastic debris', (ii) survey the existing literature on environmental presence, fate, and interaction of micronized rubber particles with biota, and lastly (iii) present future research needs that require consideration in order to move this research area forward. Existing knowledge gaps that require attention include; determining the environmental presence and fate of micronized rubber within different environmental compartments, understanding the interaction of rubber particles with biota, particularly as potential impacts have so far been attributed solely to the leachate, and evaluating whether standard ecotoxicological protocols need to be adapted for particulate contaminants in general and specifically to suit rubber particulates and leachate.
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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.
Environmental occurrence, fate, impact, and potential solution of tire microplastics: Similarities and differences with tire wear particles
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This review examines tire microplastics, one of the most abundant types of microplastics in the environment, which come from tire wear on roads, recycled tire rubber, and tire repair dust. These particles carry a complex mix of chemicals including heavy metals and organic pollutants that can harm aquatic and soil organisms. Since tire microplastics end up in waterways and soil near roads, they represent a significant but often overlooked source of human microplastic exposure.
Tire wear particles: An emerging threat to soil health
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This review examines tire wear particles as an emerging source of soil contamination, finding that these microplastics contain a complex mixture of rubber, metals, and organic chemicals that can harm soil organisms. Researchers highlight that most current studies focus on individual species, which may underestimate the cascading effects on entire soil ecosystems. The study warns that tire wear particles could alter essential soil processes and ecosystem services, representing a significant but underappreciated threat to soil health.
Microplastics and tire wear particles in aquatic environment: A comparative review on generation, characteristics and environmental behavior
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Tiny bits of rubber worn off from car tires are actually one of the biggest sources of microplastic pollution in our water, yet they've gotten far less scientific attention than plastic microplastics from bottles and packaging. This review paper — which summarizes existing research rather than presenting new experiments — shows that tire particles behave differently, potentially leaching different chemicals and carrying pollutants in unique ways, meaning the safety testing methods designed for regular microplastics may not fully capture the risks tire particles pose to waterways and, ultimately, human health.
Tire wear particles: An emerging threat to soil health
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This review synthesizes knowledge about tire wear particles — a major but often overlooked source of microplastic-like pollutants — in soil ecosystems. Tire wear particles contain toxic metals and organic compounds that harm soil microbes, invertebrates, and plants, but most research to date has focused on aquatic systems rather than soils.
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