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Journal of University of Chinese Academy of Sciences ›› 2023, Vol. 40 ›› Issue (1): 39-49.DOI: 10.7523/j.ucas.2021.0025

• Research Articles • Previous Articles    

Atmospheric VOCs and their contribution to O3 and SOA formation in summer of Huairou District, Beijing City

ZHOU Bi1, HU Jun2, QI Yixuan3, ZHANG Lijia4, HUO Peng1,5,6, ZHANG Yuanxun1,5,6, ZHANG Yang1,5,6, WANG Shulan7   

  1. 1. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China;
    2. ZHTH(Beijing) Environmental Science Research Institute Co. Ltd, Beijing 100085, China;
    3. Ordos Meteorological Bureau, Ordos 017010, Inner Mongolia, China;
    4. Resource and Environmental Branch, China National Institute of Standardization, Beijing 100191, China;
    5. Beijing Yanshan Earth Critical Zone National Research Station, University of Chinese Academy of Sciences, Beijing 101400, China;
    6. National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101400, China;
    7. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  • Received:2021-01-25 Revised:2021-03-23

Abstract: In order to study the pollution characteristics and sources of volatile organic compounds (VOCs) and their environmental impact, 99 VOCs in Huairou District of Beijing were monitored online in summer 2016. During the observation period, the average concentration of VOCs was 20.02×10-9, among which alkanes accounted for the highest proportion of 38.48%, followed by oxygenated volatile organic compounds (OVOCs) (28.28%), halogenated hydrocarbons (12.89%), and halogenated hydrocarbons, aromatic hydrocarbons, olefins and alkynes and acetonitrile for a smaller percentage. The average hourly ozone formation potential of the initial VOCs was 157.03μg·m-3 and the major contributors were OVOCs, while alkenes and aromatics, aromatics were the major contributors to secondary organic aerosol formation potential. Seven sources were identified by the PMF model, including background and combustion sources, industrial sources, diesel vehicle emissions, gasoline vehicle emissions oil and gas volatilization, natural sources, and organic solvent use. The results from backward trajectory show that, in addition to local emissions, Hebei, Henan, and Shandong provinces have major contributions to Beijing VOCs pollution, while Tianjin City, Liaoning Province, and Inner Mongolia Autonomous Region also have some contributions.

Key words: volatile organic compounds(VOCs), ozone formation potential(OFP), secondary organic aerosol formation potential(SOAFP), source apportionment, backward trajectory, regional transmission

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