Investigation on DOPO as reactive fumes suppressant to reduce the fumes emission of asphalt

Journal Article (2023)
Author(s)

Shangheng Zeng (Wuhan University of Technology)

Sanpeng Mao (Research Institute of Petro China Fuel Oil Co. Ltd., Wuhan University of Technology)

Shi Xu (TU Delft - Materials and Environment, Wuhan University of Technology)

Yanheng He (Wuhan University of Technology)

Jianying Yu (Wuhan University of Technology)

Research Group
Materials and Environment
Copyright
© 2023 Shangheng Zeng, Sanpeng Mao, S. Xu, Yanheng He, Jianying Yu
DOI related publication
https://doi.org/10.1016/j.jhazmat.2023.132878
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 Shangheng Zeng, Sanpeng Mao, S. Xu, Yanheng He, Jianying Yu
Research Group
Materials and Environment
Bibliographical Note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. @en
Volume number
463
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Abstract

Asphalt fumes released during pavement construction posed a threat to human health and environment. In this study, 9,10-dihydro-9-oxa-10-phosphorophenanthrene-10-oxide (DOPO) was used as a reactive fumes suppressant to reduce the asphalt fumes emission. The volatilization behavior of DOPO modified asphalt (DOPO-Asphalt) was investigated through thermogravimetric analysis, volatility test and thermal destruction gas chromatography mass spectrometry, and effect of DOPO on the chemical structure and composition of asphalt was explored through nuclear magnetic resonance hydrogen spectroscopy, Fourier transform infrared spectroscopy, and asphalt component testing. The results indicated that 1.0 wt% DOPO reduced the fume content of control asphalt by 1.1% from 120 ℃ − 200 ℃ and the H2S and VOC content by 96.9% and 84.2%, respectively, at 180 ℃. Moreover, 1.0 wt% DOPO reduced the content of aliphatic hydrocarbons, hydrocarbon derivatives, aromatics, and sulfides in control asphalt fumes by 86.8%, 89.7%, 90.7%, and 93.5%, respectively, which may be attributed to electrophilic and nucleophilic reactions between DOPO and volatile substances in asphalt. Chemical structure and composition changing of DOPO-Asphalt confirmed that P-H bond in DOPO was chemically reacted with components in asphalt, generating stable aromatic hydrocarbons and resins. The results provided a novel method for inhibiting the volatilization of harmful substances in asphalt.

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