DOI: 10.1016/j.atmosenv.2013.12.014
Scopus记录号: 2-s2.0-84892560469
论文题名: Carbon isotopic characterization of formaldehyde emitted by vehicles in Guangzhou, China
作者: Hu P ; , Wen S ; , Liu Y ; , Bi X ; , Chan L ; Y ; , Feng J ; , Wang X ; , Sheng G ; , Fu J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 86 起始页码: 148
结束页码: 154
语种: 英语
英文关键词: Carbon isotope
; Emission factor
; Formaldehyde
; Vehicle emission
Scopus关键词: Anthropogenic sources
; Carbon isotopes
; Emission factors
; Isotopic characterization
; Isotopic fractionations
; Isotopic signatures
; Vehicle emission
; Vehicle exhaust emissions
; Automobile engines
; Carbon
; Catalytic converters
; Combustion
; Diesel engines
; Diesel locomotives
; Engines
; Formaldehyde
; Gasoline
; Hydrogen bonds
; Isotopes
; Mass spectrometry
; Vehicles
; Automobiles
; carbon
; formaldehyde
; gasoline
; anthropogenic effect
; anthropogenic source
; carbon isotope
; catalyst
; combustion
; diesel engine
; formaldehyde
; gas chromatography
; isotopic ratio
; traffic emission
; article
; atmosphere
; car
; catalysis
; China
; combustion
; diesel engine
; exhaust gas
; fractionation
; gas chromatography
; isotope analysis
; mass spectrometry
; priority journal
; China
; Guangdong
; Guangzhou
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: Formaldehyde (HCHO) is the most abundant carbonyl compound in the atmosphere, and vehicle exhaust emission is one of its important anthropogenic sources. However, there is still uncertainty regarding HCHO flux from vehicle emission as well as from other sources. Herein, automobile source was characterized using HCHO carbon isotopic ratio to assess its contributions to atmospheric flux and demonstrate the complex production/consumption processes during combustion in engine cylinder and subsequent catalytic treatment of exhaust. Vehicle exhausts were sampled under different idling states and HCHO carbon isotopic ratios were measured by gas chromatograph-combustion-isotopic ratio mass spectrometry (GC-C-IRMS). The HCHO directly emitted from stand-alone engines (gasoline and diesel) running at different load was also sampled and measured. The HCHO carbon isotopic ratios were from-30.8 to-25.7‰ for gasoline engine, and from-26.2 to-20.7‰ for diesel engine, respectively. For diesel vehicle without catalytic converter, the HCHO carbon isotopic ratios were-22.1±2.1‰, and for gasoline vehicle with catalytic converter, the ratios were-21.4±0.7‰. Most of the HCHO carbon isotopic ratios were heavier than the fuel isotopic ratios (from-29 to-27‰). For gasoline vehicle, the isotopic fractionation (δ13C) between HCHO and fuel isotopic ratios was 7.4±0.7‰, which was higher than that of HCHO from stand-alone gasoline engine (δ13Cmax=2.7‰), suggesting additional consumption by the catalytic converter. For diesel vehicle without catalytic converter, δ13C was 5.7±2.0‰, similar to that of stand-alone diesel engine. In general, the carbon isotopic signatures of HCHO emitted from automobiles were not sensitive to idling states or to other vehicle parameters in our study condition. On comparing these HCHO carbon isotopic data with those of past studies, the atmospheric HCHO in a bus station in Guangzhou might mainly come from vehicle emission for the accordance of carbon isotopic data. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80754
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China; South China Sea Environmental Monitoring Center, State Oceanic Administration, Guangzhou 510300, China; The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, China
Recommended Citation:
Hu P,, Wen S,, Liu Y,et al. Carbon isotopic characterization of formaldehyde emitted by vehicles in Guangzhou, China[J]. Atmospheric Environment,2014-01-01,86