Real-Time Pyrolysis Dynamics of Thermally Aged Tire Microplastics by TGA-FTIR-GC/MS
Author:
Bai Guangteng123, Fu Juyang2, Zhou Qian2, Pan Xiangliang12
Affiliation:
1. Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences, Urumqi 830011, China 2. Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China 3. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract
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.
Funder
National Natural Science Foundation of China Natural Science Foundation of Zhejiang Province
Subject
Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry
Reference59 articles.
1. Andersson-Sköld, Y., Johannesson, M., Gustafsson, M., Järlskog, I., Lithner, D., Polukarova, M., and Strömvall, A.-M. (2020). Microplastics from Tyre and Road Wear: A Literature Review, Swedish National Road and Transport Research Institute (VTI). 2. Bostock, J. (2021). Global Industry Tire Volume to Reach 2.7 Bilion Units by 2022, Smithers. 3. Tire wear particles in the aquatic environment—A review on generation, analysis, occurrence, fate and effects;Wagner;Water Res.,2018 4. Quantification of tire wear particles in road dust from industrial and residential areas in Seoul, Korea;Youn;Sci. Total Environ.,2021 5. Buss, A.H., Kovaleski, J.L., Pagani, R.N., da Silva, V.L., and Silva, J.D.M. (2019). Proposal to reuse rubber waste from end-of-life tires using thermosetting resin. Sustainability, 11.
|
|