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20 resultsShowing papers similar to Toxic effects of environmentally persistent free radicals (EPFRs) on the surface of tire wear particles on freshwater biofilms: The alleviating role after sewage-incubation-aging
ClearA critical review of tire wear particles aging and ecotoxicological consequences in terrestrial environments: Insights into environmentally persistent free radicals
This review synthesizes evidence on how tire wear particles age in terrestrial environments and the resulting ecological consequences. Researchers found that UV-induced aging generates environmentally persistent free radicals and reactive oxygen species that amplify soil toxicity, while biodegradation may reduce some risks. The study highlights that characterizing aged tire wear particles remains difficult due to their compositional complexity and calls for standardized analytical methods.
Electrochemical-oxidative dualism: Decoupling the acute effects of lake water-aged tire wear particles on periphytic biofilm-mediated denitrification
This study examined how freshly generated and lake water-aged tire wear particles (TWPs) of different types affect denitrification in periphytic biofilms. Neither fresh nor aged TWPs altered nitrate removal or denitrification gene abundance, despite aging increasing the electron exchange capacity and free radical content of particles.
In Vitro Assessment Reveals the Effects of Environmentally Persistent Free Radicals on the Toxicity of Photoaged Tire Wear Particles
Researchers examined how tire wear particles change when exposed to sunlight and found that the aging process generates environmentally persistent free radicals on their surfaces. These radicals significantly increased the toxicity of the particles in laboratory cell tests, causing oxidative stress and DNA damage. The study suggests that weathered tire particles may be more harmful than freshly released ones, adding a new dimension to microplastic pollution concerns.
Aging increases the particulate- and leachate-induced toxicity of tire wear particles to microalgae.
Researchers found that environmental aging of tire wear particles increases their toxicity to marine microalgae beyond that of fresh particles, with aged particles triggering greater oxidative stress, photosynthesis disruption, and metabolic changes in the algae.
A study on the aquatic degradation of tire wear particles: Impact of environmental factors and material formulations
This study assessed how tire wear particles degrade in freshwater environments under varying environmental conditions including UV radiation and water chemistry. The degradation process alters particle properties in ways that may increase toxicity to aquatic organisms.
A study on the aquatic degradation of tire wear particles: Impact of environmental factors and material formulations
This study investigated how tire wear particles degrade in aquatic environments, examining the effects of environmental factors such as UV exposure and water chemistry on particle breakdown. The results showed that aquatic degradation alters tire wear particles in ways that may increase their ecotoxicological risk.
Determination of aerobic and anaerobic biological degradability of waste tyres
Researchers examined the aerobic and anaerobic biodegradability of waste tire rubber in aquatic environments, finding very limited biological degradation under both conditions, confirming that tire-derived particles persist as long-term environmental contaminants.
Effects of tire wear particles with and without photoaging on anaerobic biofilm sulfide production in sewers and related mechanisms
Researchers investigated how tire wear particles, both fresh and photoaged, affect sulfide production in sewer biofilms, finding that photoaging altered particle surface properties and leachate composition, influencing microbial sulfide generation in anaerobic sewer environments.
A comparative analysis of the chemical composition and biofilm formation on tire wear particles from six different tire types
Researchers analyzed the chemical composition and biofilm communities forming on tire-wear particles compared to other microplastic types, finding that tire wear particles support distinct microbial assemblages. The unique surface chemistry of tire wear particles may promote the attachment of pathogens and toxin-producing microorganisms.
Environmental aging and biodegradation of tire wear microplastics in the aquatic environment
Researchers investigated the environmental aging and biodegradation of tire wear microplastics in freshwater over 12 weeks, finding that biofilm formation and chemical changes occurred but complete biodegradation was limited under the studied conditions.
Aging, characterization and sorption behavior evaluation of tire wear particles for tetracycline in aquatic environment
Researchers aged tire wear particles using UV weathering and chemical oxidation and studied how aging affects their sorption of tetracycline antibiotics, finding that weathering significantly alters surface chemistry and increases the capacity of tire particles to adsorb and potentially transport pharmaceutical contaminants.
When and how leachate toxicity of tire wear particles peaks: quantifying its dynamics using dose-response analysis
Researchers quantified how leachate toxicity from tire wear particles (TWP) changes with weathering over time, using aging experiments and toxicity bioassays to map the temporal dynamics of toxic compound release. Toxicity peaked during early weathering as soluble compounds leached rapidly, then declined, providing data relevant to risk assessment of TWP in stormwater runoff.
Toxicity of tire wear particles and the leachates to microorganisms in marine sediments
Researchers investigated the toxicity of tire wear particles and their chemical leachates on bacteria in marine sediments. The study found that aged tire wear particles were more toxic than pristine ones, and that leachates were even more harmful than the particles themselves, with zinc identified as the primary toxicity-causing substance.
Tire wear particles in different water environments: occurrence, behavior, and biological effects—a review and perspectives
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.
Aging of Tire Particles in Deep-Sea Conditions: Interactions between Hydrostatic Pressure, Prokaryotic Growth and Chemical Leaching.
This laboratory study simulated deep-sea conditions to investigate how high hydrostatic pressure and prokaryotic biofilms affect tire particle aging. Deep-sea pressure and microbial colonization altered the physical and chemical properties of tire particles, with implications for their long-term fate as a microplastic sink.
Generation of environmentally persistent free radicals on photoaged tire wear particles and their neurotoxic effects on neurotransmission in Caenorhabditis elegans
Tire wear particles, a common type of microplastic found on roads and in waterways, become more toxic after exposure to sunlight. This study found that sunlight-aged tire particles generate persistent free radicals that damaged the nervous system of test organisms, reducing movement and lowering levels of key brain chemicals like dopamine and serotonin. These findings suggest that weathered tire particles may pose a greater neurotoxic risk than fresh ones.
Leaching hazards of tire wear particles in hydrothermal treatment of sludge: Exploring molecular composition, transformation mechanism, and ecological effects of tire wear particle-derived compounds
When sewage sludge containing tire wear particles was treated with high heat and pressure, the process accelerated the release of harmful chemicals from the tire rubber into the liquid byproduct. Researchers identified 144 different chemical compounds leaching from the tire particles, many of which were toxic to aquatic organisms and plants -- highlighting how waste treatment processes can inadvertently spread tire-derived microplastic pollution.
Effect of UV exposure and natural aging on the in vitro PAHs bioaccessibility associated with tire wear particles in soil
Researchers examined how UV exposure and natural aging change the ability of tire wear particles to release polycyclic aromatic hydrocarbons in soil. They found that UV aging increased the surface reactivity of the particles and altered how readily these toxic compounds could be absorbed by living organisms. The study suggests that weathered tire particles in roadside soils may pose greater health risks than fresh ones.
Adsorption of emerging micropollutants on tire wear particles
Researchers examined how tire wear particles (TWP) adsorb two common water pollutants—bisphenol A and 1H-benzotriazole—and how aging processes (photo, chemical, biological) affect that adsorption. TWP showed stronger adsorption of bisphenol A than benzotriazole, and aging altered sorption behavior, highlighting TWP as a significant carrier of micropollutants in aquatic environments.
Effects of tire wear particles on freshwater bacterial-fungal community dynamics and subsequent elemental cycles using microcosms.
Researchers conducted freshwater microcosm experiments to assess how tire wear particles (TWPs) affect bacterial-fungal community dynamics and biogeochemical cycles in rural versus urban lake sediments and overlying water. They found TWPs altered microbial composition more strongly in water than sediment and increased bacteria-fungi network complexity, with cascading effects on nitrogen and carbon cycling.