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题名: Experimental and theoretical studies on gas-phase reactions of NO3 radicals with three methoxyphenols: Guaiacol, creosol, and syringol
作者: Yang, Bo; Zhang, Haixu; Wang, Youfeng; Zhang, Peng; Shu, Jinian; Sun, Wanqi; Ma, Pengkun
刊名: ATMOSPHERIC ENVIRONMENT
出版日期: 2016-01
卷号: 125, 期号:0, 页码:243-251
关键词: Methoxyphenol ; NO3 radical ; Rate constant ; Reaction mechanism
DOI: 10.1016/j.atmosenv.2015.11.028
部门归属: 大气污染控制中心
英文摘要: Methoxyphenols, lignin pyrolysis products, are major biomass combustion components and are considered potential tracers for wood smoke emissions. Their atmospheric reactivity, however, has not been well characterized. Guaiacol, creosol, and syringol are three typical methoxyphenols generated in relatively high concentrations in fresh wood smoke. In this study, the gas-phase reactions of NO3 radicals with these methoxyphenols were investigated using a laboratory-built vacuum ultraviolet photoionization gas time-of-flight mass spectrometer (VUV-GTOFMS) and off-line GC-MS. By combining experimental and theoretical methods, 4-nitroguaiacol, 6-nitroguaiacol, and 4,6-dinitroguaiacol were determined as the primary degradation products for guaiacol; similarly, 6-nitrocreosol and 3-nitrosyringol were identified for creosol and syringol, respectively. Using the relative rate method, rate constants at 298 K and 1 atm for the gas-phase reactions of guaiacol, creosol, and syringol with NO3 radicals were measured to be 3.2 x 10(-12), 2.4 x 10(-13), and 4.0 x 10(-13) cm(3) molecule(-1) s(-1), respectively. At a typical tropospheric concentration of NO3 radicals (5 x 10(8) molecule cm(-3)), atmospheric lifetimes for guaiacol, creosol, and syringol toward NO3 radicals were 0.2, 2.3, and 1.4 h, respectively. These results indicate that the reaction with NO3 radicals can be a major sink for methoxyphenols at night. (C) 2015 Elsevier Ltd. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35749
Appears in Collections:大气污染控制中心_期刊论文

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Yang, Bo,Zhang, Haixu,Wang, Youfeng,et al. Experimental and theoretical studies on gas-phase reactions of NO3 radicals with three methoxyphenols: Guaiacol, creosol, and syringol[J]. ATMOSPHERIC ENVIRONMENT,2016,125(0):243-251.
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