Dynamic pyrolytic reaction mechanisms, pathways, and products of medical masks and infusion tubes
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Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Given the COVID-19 epidemic, the quantity of hazardous medical wastes has risen unprecedentedly. This study char-acterized and verified the pyrolysis mechanisms and volatiles products of medical mask belts (MB), mask faces (MF), and infusion tubes (IT) via thermogravimetric, infrared spectroscopy, thermogravimetric-Fourier transform infrared spectroscopy, and pyrolysis-gas chromatography/mass spectrometry analyses. Iso-conversional methods were employed to estimate activation energy, while the best-fit artificial neural network was adopted for the multi-objective optimization. MB and MF started their thermal weight losses at 375.8 degrees C and 414.7 degrees C, respectively, while IT started to degrade at 227.3 degrees C. The average activation energies were estimated at 171.77, 232.79, 105.14, and 205.76 kJ/mol for MB, MF, and the first and second IT stages, respectively. Nucleation growth for MF and MB and geometrical contraction for IT best described the pyrolysis behaviors. Their main gaseous products were classified, with a further proposal of their initial cracking mechanisms and secondary reaction pathways.
Açıklama
This research was fi nancially supported by the National Natural Science Foundation of China (No. 51978175) , the Natural Science Founda-tion of Guangdong Province, China (No. 2022A1515010825) , and the Sci-enti fi c and Technological Planning Project of Guangzhou, China (No. 202103000004) . We would like to thank teacher Chunxiao Yang at the AnaIysis and Test Center of Guangdong University of Technology for her as-sistance with the TG-FTIR analysis.
Anahtar Kelimeler
Medicalplasticwastes, Pyrolysis, TG-FTIR, Py-GC, MS, Reactionmechanisms
Kaynak
Science of the Total Environment
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
842
Sayı
Künye
Xu, W., Liu, J., Ding, Z., Fu, J., Evrendilek, F., Xie, W., & He, Y. (2022). Dynamic pyrolytic reaction mechanisms, pathways, and products of medical masks and infusion tubes. Science of the Total Environment, 842, 156710.
