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

Shangheng Zeng; Sanpeng Mao; Shi Xu; Yanheng He; Jianying Yu

doi:10.1016/j.jhazmat.2023.132878

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

J Hazard Mater. 2024 Feb 5:463:132878. doi: 10.1016/j.jhazmat.2023.132878. Epub 2023 Oct 28.

Authors

Shangheng Zeng¹, Sanpeng Mao², Shi Xu³, Yanheng He¹, Jianying Yu⁴

Affiliations

¹ State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China.
² State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China; Research Institute of Petro China Fuel Oil Co., Ltd., Beiwucun Road 25, Beijing 100195, PR China.
³ Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, PR China; Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, the Netherlands.
⁴ State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, PR China. Electronic address: jyyu@whut.edu.cn.

PMID: 37922580
DOI: 10.1016/j.jhazmat.2023.132878

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.

Keywords: 10-Dihydro-9-oxa-10-phosphorophenanthrene-10-oxide; 9; Asphalt; Fumes; Reactive fumes suppressant; Volatile organic compounds.