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Real-Time Pyrolysis Dynamics of Thermally Aged Tire Microplastics by TGA-FTIR-GC/MS

Water 2023 11 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xiangliang Pan Guangteng Bai, Qian Zhou, Qian Zhou, Qian Zhou, Juyang Fu, Xiangliang Pan Guangteng Bai, Qian Zhou, Juyang Fu, Qian Zhou, Qian Zhou, Qian Zhou, Qian Zhou, Juyang Fu, Xiangliang Pan Qian Zhou, Qian Zhou, Juyang Fu, Qian Zhou, Juyang Fu, Juyang Fu, Juyang Fu, Xiangliang Pan Juyang Fu, Xiangliang Pan Qian Zhou, Qian Zhou, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Qian Zhou, Xiangliang Pan Qian Zhou, Qian Zhou, Qian Zhou, Xiangliang Pan Xiangliang Pan Xiangliang Pan Qian Zhou, Qian Zhou, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Qian Zhou, Qian Zhou, Xiangliang Pan Qian Zhou, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan Qian Zhou, Xiangliang Pan Qian Zhou, Xiangliang Pan Xiangliang Pan Xiangliang Pan Xiangliang Pan

Summary

Researchers used a combined thermal analysis and spectroscopy technique (TGA-FTIR-GC/MS) to characterise in real time how tire wear particles — a major but often overlooked type of microplastic — break down when heated, releasing a range of potentially toxic organic compounds. Understanding the pyrolysis chemistry of aged tire microplastics is important for assessing the contamination risks they pose to aquatic and terrestrial environments as they degrade.

Polymers

rubber

Tire wear particles (TWPs), as a type of thermosetting microplastic (MP), accumulate in aquatic environments due to their wide application in road traffic globally. The increase in temperature because of friction heat may cause aging of tire materials, inducing water evaporation, additive volatilization, polymer decomposition, and may pose serious potential risks to aquatic and terrestrial ecosystems. However, research on real-time pyrolysis dynamics of thermally aged tire MPs is very limited. In this study, a thermogravimetric analyzer coupled with Fourier transform infrared spectrometry and gas chromatography-mass spectrometry (TG-FTIR-GC/MS) was used to investigate pyrolysis behaviors and products of thermally aged tire MPs. FTIR analysis indicated that the main pyrolysis gases included carbon dioxide, carbon monoxide, aliphatic compounds, aromatic compounds and carbonyl compounds. The GC/MS analysis further determined the main pyrolytic products, including methylbenzene, styrene, m-xylene and D-limonene. These data combined with TG analysis revealed that the main pyrolytic products of TWPs were released at 400–600 °C. Moreover, the results showed that the number of aliphatic/aromatic compounds released increased in short-term thermo-oxidative aging but decreased in long-term thermo-oxidative aging. Moreover, the aged TWPs presented higher released amounts of styrene and methylbenzene but lower amounts of D-limonene compared to the original TWPs. These results can provide new insights into the evaluation method of TWP aging and a better understanding on TWP fate in aquatic and terrestrial environments.

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