DOI: 10.1016/j.atmosenv.2018.02.051
Scopus记录号: 2-s2.0-85045889770
论文题名: SOA formation from photooxidation of naphthalene and methylnaphthalenes with m-xylene and surrogate mixtures
作者: Chen C ; -L ; , Li L ; , Tang P ; , Cocker D ; R ; , III
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 180 起始页码: 256
结束页码: 264
语种: 英语
英文关键词: m-Xylene
; Polycyclic aromatic hydrocarbons
; Secondary organic aerosol
; Surrogate mixture
; Two-product model
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: SOA formation is not well predicted in current models in urban area. The interaction among multiple anthropogenic volatile organic compounds is essential for the SOA formation in the complex urban atmosphere. Secondary organic aerosol (SOA) from the photooxidation of naphthalene, 1-methylnaphthalene, and 2-methylnaphthalene as well as individual polycyclic aromatic hydrocarbons (PAHs) mixed with m-xylene or an atmospheric surrogate mixture was explored in the UCR CE-CERT environmental chamber under urban relevant low NOx and extremely low NOx (H2O2) conditions. Addition of m-xylene suppressed SOA formation from the individual PAH precursor. A similar suppression effect on SOA formation was observed during the surrogate mixture photooxidation suggesting the importance of gas-phase chemical reactivity to SOA formation. The SOA growth rate for different PAH-m-xylene mixtures was strongly correlated with initial [HO2]/[RO2] ratio but negatively correlated with initial m-xylene/NO ratio. Decreasing SOA formation was observed for increasing m-xylene/PAHs ratios and increasing initial m-xylene/NO ratio. The SOA chemical composition characteristics such as f44 versus f43 H/C ratio, O/C ratio, and the oxidation state of the carbon OS¯c were consistent with a continuously aging with the SOA exhibiting characteristics of both individual precursors. SOA formation from PAHs was also suppressed within an atmospheric surrogate mixture compared to the SOA formed from individual PAHs, indicating that atmospheric reactivity directly influences SOA formation from PAHs. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82936
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Chemical and Environmental Engineering, University of California, Riverside, CA, United States; College of Engineering – Center for Environmental Research and Technology (CE-CERT)CA, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Environmental Science and Engineering, California Institute of TechnologyCA, United States
Recommended Citation:
Chen C,-L,, Li L,et al. SOA formation from photooxidation of naphthalene and methylnaphthalenes with m-xylene and surrogate mixtures[J]. Atmospheric Environment,2018-01-01,180