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What Tires Leave Behind Can Become Toxic Fish Food
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Tiny bits of worn-down tire rubber end up in oceans and rivers, and new research shows fish will actually eat these particles—mistaking them for food. This can hurt the fish's growth and change how they behave, which matters because these same fish often end up on our dinner plates, meaning tire pollution could be quietly working its way up the food chain to us.
Tire particles might seem tasty, if you’re a fish—but a new study shows how this pervasive microplastic can affect growth and behavior in marine species.
More Papers Like This
Tire wear particle leachate-induced hepatotoxicity in Carassius auratus: Associations with gut microbiota dysbiosis and lipid metabolism disorder
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Chemicals leaching from tire wear particles (tiny bits of rubber that wash off roads into waterways) caused liver damage, gut bacteria imbalances, and disrupted fat metabolism in fish exposed to environmentally realistic levels over 28 days. While this study was done in fish, not humans, it's a warning sign worth watching, tire particles are a widespread and growing pollutant in our water systems, and this research suggests they could harm the health of aquatic life we may eventually eat or interact with, making it worth understanding how these hidden pollutants move through the environment.
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.
Increased Aquatic Toxicity of Tire Wear Particles Following Oxidative Aging: Mechanism Insights into Matrix Loosening and Transformation Products
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Tiny bits of tire rubber wash into rivers and lakes, and this study found that sunlight and ozone exposure make them even more toxic over time, not less. As the particles break down, they release new chemical byproducts that made up nearly half of the harmful effects seen in zebrafish embryos, even at very low, real-world exposure levels. This matters because it suggests weathered tire particles in waterways could pose bigger risks to aquatic life (and potentially the food chain) than current safety testing accounts for, since most assessments don't look for these newly formed breakdown chemicals.
The Toxicity of Tire Wear Particles and Their Leachates on Digestion and Gut Microbiota of Mytilus coruscus
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Tiny bits of tire rubber that wash into the ocean—along with the chemicals that leach out of them—harmed mussels by causing cell damage, disrupting digestion, and throwing off the balance of healthy gut bacteria, with the actual particles causing more harm than the chemicals alone. Since mussels and other shellfish are commonly eaten by humans, this research is an early warning sign that tire pollution in our waterways could work its way into our food and potentially affect our own digestive health.
Bioaccessibility of Organic Compounds Associated with Tire Particles Using a Fish In Vitro Digestive Model: Solubilization Kinetics and Effects of Food Coingestion.
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Researchers used a fish gastrointestinal model to test the bioaccessibility of toxic organic chemicals associated with tire and road wear particles (TRWPs). They found that several compounds including benzothiazoles and polycyclic aromatic hydrocarbons were released from tire particles under simulated digestive conditions. This suggests that fish consuming TRWPs could be exposed to meaningful doses of tire-derived chemicals.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.