DOI: 10.1016/j.atmosenv.2018.04.005
Scopus记录号: 2-s2.0-85045956190
论文题名: Impacts of heterogeneous reactions to atmospheric peroxides: Observations and budget analysis study
作者: Qin M ; , Chen Z ; , Shen H ; , Li H ; , Wu H ; , Wang Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 183 起始页码: 144
结束页码: 153
语种: 英语
英文关键词: Budget analysis
; Heterogeneous uptake
; Hydrogen peroxide
; Peroxyacetic acid
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric peroxides play important roles in atmospheric chemistry, acting as reactive oxidants and reservoirs of HOX and ROX radicals. Field measurements of atmospheric peroxides were conducted over urban Beijing from 2015 to 2016, including dust storm days, haze days and different seasons. We employed a box model based on RACM2 mechanism to conduct concentration simulation and budget analysis of hydrogen peroxide (H2O2) and peroxyacetic acid (PAA). In this study, heterogeneous reaction is found to be a significant sink for atmospheric H2O2 and PAA in urban Beijing. Here, we recommend a suitable uptake coefficient formula considering the water effect for model research of peroxides. It is found that H2O2 and PAA unexpectedly maintained considerable concentrations on haze days, even higher than that on non-haze days. This phenomenon is mainly ascribed to relatively high levels of volatile organic compounds and ozone on haze days. In addition, high levels of water vapor in pollution episode can promote not only the heterogeneous uptake to aerosol phase but also the production of H2O2. Atmospheric PAA formation is suggested to be sensitive to alkenes and NOX in urban Beijing. In particular, with the help of peroxides, sulfate formation rate from heterogeneous uptake could increase by ∼4 times on haze days, indicating the potential effect of peroxides on enhancement of aerosol oxidative property and secondary sulfate formation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82873
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; School of Earth and Environmental Sciences, University of Manchester, Manchester, United Kingdom
Recommended Citation:
Qin M,, Chen Z,, Shen H,et al. Impacts of heterogeneous reactions to atmospheric peroxides: Observations and budget analysis study[J]. Atmospheric Environment,2018-01-01,183