DOI: 10.1016/j.atmosenv.2015.05.021
Scopus记录号: 2-s2.0-84929415910
论文题名: Characteristics of volatile organic compounds and their role in ground-level ozone formation in the Beijing-Tianjin-Hebei region, China
作者: Li L ; , Xie S ; , Zeng L ; , Wu R ; , Li J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 113 起始页码: 247
结束页码: 254
语种: 英语
英文关键词: Chemical reactivity
; Emission inventory
; Ozone formation
; VOCs
Scopus关键词: Acetone
; Carbonyl compounds
; Chemical compounds
; Chemical reactivity
; Chemical speciation
; Ethylene
; Hydrocarbons
; Isoprene
; Methane
; Mixing
; Organic compounds
; Propylene
; Volatile organic compounds
; Beijing-tianjin-hebei regions
; Biogenic emission
; Emission inventories
; Ground level ozone formation
; Non-methane hydrocarbons
; Ozone formation
; Vehicle exhaust emissions
; VOCs
; Ozone
; acetone
; alkane
; alkene
; butane
; carbonyl derivative
; cyclohexane
; decane
; ethane
; ethylene
; heptane
; hexane
; hydrocarbon
; isoprene
; nonane
; octane
; ortho xylene
; ozone
; pentane
; propane
; propylene
; toluene
; volatile organic compound
; xylene
; alkene
; atmospheric pollution
; biogenic emission
; carbonyl compound
; emission inventory
; nonmethane hydrocarbon
; ozone
; photochemistry
; speciation (chemistry)
; traffic emission
; volatile organic compound
; Article
; China
; exhaust gas
; measurement
; priority journal
; rate constant
; vegetation
; Beijing [China]
; China
; Hebei
; Tianjin
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: To better understand the chemical speciation of volatile organic compounds (VOCs) and their role in ground-level ozone formation in the Beijing-Tianjin-Hebei region, China, measurements of 56 non-methane hydrocarbons (NMHCs) and 12 carbonyls were conducted at three sites in summer. Alkanes were the largest group of NMHCs (>50%), followed by alkenes and aromatics. Acetone was the most abundant carbonyl species (>50%). The OH loss rates (LOH ) of VOCs were calculated to estimate their chemical reactivities. Alkenes played a predominant role in VOC reactivity, among which ethene and propene were the largest contributors. Isoprene contributed 11.61-38.00% of the total reactivity of measured VOCs. Alkenes and aromatics were the largest contributors (47.65-61.53% totally) to the total Ozone Formation Potential (OFP) of measured VOCs based on the observed mixing ratio. Isoprene was the most reactive species, but originated mainly from biogenic emissions. Ethene, m/p-xylene, toluene, propene, o-xylene, and 1-butene were considered to play significant roles in ground-level ozone formation in this region. The OFPs of total measured NMHCs increased by 10.20-22.05% when they were calculated based on the initial mixing ratio. Photochemical losses of hydrocarbons and the secondary formation of carbonyls in this region were also determined. Vehicle exhaust emissions contributed substantially to ambient VOCs. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81714
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: College of Environmental Sciences and Engineering, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing, China
Recommended Citation:
Li L,, Xie S,, Zeng L,et al. Characteristics of volatile organic compounds and their role in ground-level ozone formation in the Beijing-Tianjin-Hebei region, China[J]. Atmospheric Environment,2015-01-01,113