Yanan Guan1,2, Yihao Zhang1, Yisen Zhang1, Xiaoli Wang3, Jing Han1,2, Wenbo Song3, Li’an Hou4, Erhong DuanThis email address is being protected from spambots. You need JavaScript enabled to view it.1,2

1 School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
2 National Joint Local Engineering Research Center for Volatile Organic Compounds and Odorous Pollution Control, Shijiazhuang 050018, China
3 Hebei Province Environmental Emergency and Heavy Pollution Weather Forewarning Center, Shijiazhuang 050018, China
4 Logistics Science and Technology Research Institute of Rocket Army, Beijing 100011, China


 




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Download Citation: ||https://doi.org/10.4209/aaqr.2019.11.0595 

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Cite this article:

Guan, Y., Zhang, Yihao, Zhang, Yisen, Wang, X., Han, J., Song, W., Hou, L. and Duan, E. (2020). Pollution Characteristics and Key Reactive Species of Volatile Organic Compounds in Beijing-Tianjin-Hebei Area, China. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.2019.11.0595


HIGHLIGHTS

  • A one-year and hourly dataset was analyzed.
  • Clear characteristics of VOCs and seasonal changes were elucidated.
  • Clarified the reactivity of VOCs.
  • Diagnostic ratios were used to determine sources of VOCs.
 

ABSTRACT


Volatile organic compounds (VOCs) are important precursors for the formation of ground-level ozone. In this study, the hourly mixing ratio of 61 ambient VOCs species was measured from 2018 to 2019 in 10 cities in Beijing-Tianjin-Hebei (BTH) area in China. The VOCs distribution, speciation and photochemical implications also was discussed in this study. The cities with the highest mixing ratio of VOCs were in the southern part as LF, BD, HD and SJZ, while the CD and ZJK were the lowest in the north part. Alkanes were the most abundant VOCs component (50%) in all cities, while ethane and propane were the most concentrated species in all cities. The mixing ratio of VOCs was characterized as a double peak value on the daily variation curve due to the photochemical reaction intensity and the inversion layer. Also, the loss rate of OH (LOH) was calculated to evaluate the chemical reactivity of VOCs. Results illustrated that the values of LOH of alkenes and aromatics exceed the highest mixing ratio of alkanes. The study of ozone formation potential (OFP) and secondary organic aerosol formation potential (SOAp) found that alkenes and aromatics had a higher OFP and SOAp than alkanes. Based on the analytical method of the diagnostic ratios of propane/n-butane, propane/i-butane, cis-2-butane/trans-2-butane, toluene/benzene and xylene/ethylbenzene, motor vehicle emissions contributed significantly to ambient VOCs in BTH area.


Keywords: VOCs; Ozone formation potential; Secondary organic aerosols formation; China.



Aerosol Air Qual. Res. 20:-. https://doi.org/10.4209/aaqr.2019.11.0595 


Impact Factor: 2.735

5-Year Impact Factor: 2.827


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