We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
A simple method for microwave-assisted preparation of tire samples
Summary
Researchers developed a simple microwave-assisted digestion method for preparing tire rubber samples prior to heavy metal analysis, optimising the pretreatment procedure to improve efficiency and accuracy. The study evaluated digestion conditions to ensure complete dissolution of tire matrix while minimising contamination, enabling reliable determination of heavy metals that can leach into soil and agricultural products.
Heavy metals content in tires affects the safety of soil and agricultural products. The digestion method is a pretreatment for determining heavy metals in tire samples, and will affect the efficiency and accuracy of the heavy metal determination. The microwave digestion process and reagents for tire samples are not currently standardized. Therefore, this study attempts to provide an appropriate method of resolution for scholars. All digestion processes were performed in Mars One. We tested 15 different acid mixtures to determine the best reagent type and dose and then investigated the effect of maximum temperature, holding time, and sample grams on the degree of digestion. In summary, the best condition to digest the tire sample was a mixture of 3 ml HNO3 and 7 ml H2SO4, taking 0.1 (± 0.0005) g tire sample, at the maximum digestion temperature of 220 °C for 25 min. The experimental conclusion will provide a reliable experimental method for scientists using MARS One to study heavy metals in tires. At the same time, researchers using the MARS series can also find valuable references in this paper.
Sign in to start a discussion.
More Papers Like This
Determination of Tire Wear Particle-Type Polymers by Combination of Quantitative Nuclear Magnetic Resonance Spectroscopy and Soxhlet Extraction
Researchers combined quantitative pyrolysis-GC/MS with other analytical methods to specifically identify and quantify tire wear particle-derived polymers in environmental samples. The approach enables more accurate attribution of rubber polymer contamination to tire wear versus other sources.
Adapting Methods for Isolation and Enumeration of Microplastics to Quantify Tire Road Wear Particles with Confirmation by Pyrolysis GC–MS
Researchers adapted microplastic analysis methods for isolating and counting tire road wear particles from environmental samples, a challenging task due to the varied composition and density of these particles. They found that alkaline digestions are compatible with tire rubber but hydrogen peroxide can damage the particles, and developed visual criteria to distinguish tire particles from bitumen. The adapted methods were validated with road dust samples and confirmed by electron microscopy and pyrolysis mass spectrometry.
Devulcanization of Waste Tire Rubber via Microwave and Biological Methods: A Review
This review compares two environmentally friendly methods for recycling waste tire rubber: microwave devulcanization and biological desulfurization using microorganisms. Researchers found that microwave methods are faster and more efficient, while biological approaches are gentler and produce fewer toxic byproducts. Both techniques show promise for reducing tire waste, which is a major source of microplastic pollution in the environment.
Rapid generation of aged tire-wear particles using dry-, wet-, and cryo-milling for ecotoxicity testing.
Researchers developed rapid generation methods for aged tire-wear particles using dry, wet, and cryo-milling techniques to produce standardized test materials for ecotoxicity studies, characterizing the physical and chemical properties of resulting particles and comparing how milling conditions affect particle size distributions and surface chemistry.
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.