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


 

Received: November 15, 2019
Revised: May 2, 2020
Accepted: May 18, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


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 in the formation of ground-level ozone. In this study, the hourly mixing ratios of 61 ambient VOC species were monitored from 2018 till 2019 in 10 cities in the Beijing-Tianjin-Hebei (BTH) area of China, and the VOC distributions, speciation and photochemistry were also examined. The highest mixing ratios were found in the south, viz., Langfang (LF), Baoding (BD), Handan (HD) and Shijiazhuang (SJZ), and the lowest ones, in the north, viz., Chengde (CD) and Zhangjiakou (ZJK). In all of the cities, alkanes were the most abundant VOC component (50%), whereas ethane and propane were the most concentrated species. The mixing ratios of the VOCs exhibited a daily double peak as a result of the varying intensity of the photochemical reactions and the formation of the inversion layer. Additionally, the chemical reactivity of the VOCs was evaluated by calculating the loss rate of OH (LOH) for each species. Our results indicated that the alkenes and aromatics possessed higher LOH values as well as higher ozone formation potential (OFP) and secondary organic aerosol formation potential (SOAp) values than the alkanes. Based on 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 the ambient VOCs in the 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 


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