Sources of ambient non-methane hydrocarbon compounds and their impacts on O3 formation during autumn, Beijing

Fangjie Li; Shengrui Tong; Chenhui Jia; Xinran Zhang; Deng Lin; Wenqian Zhang; Weiran Li; Lili Wang; Maofa Ge; Lixin Xia

doi:10.1016/j.jes.2021.08.008

Sources of ambient non-methane hydrocarbon compounds and their impacts on O₃ formation during autumn, Beijing

J Environ Sci (China). 2022 Apr:114:85-97. doi: 10.1016/j.jes.2021.08.008. Epub 2022 Jan 16.

Authors

Fangjie Li¹, Shengrui Tong², Chenhui Jia³, Xinran Zhang⁴, Deng Lin⁵, Wenqian Zhang³, Weiran Li⁴, Lili Wang⁶, Maofa Ge⁷, Lixin Xia⁸

Affiliations

¹ College of Chemistry, Liaoning University, Shenyang 110036, China; State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
² State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. Electronic address: [email protected].
³ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
⁴ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
⁵ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; Key Laboratory of Oasis Ecology, College of Resource and Environment Sciences, Xinjiang University, Urumqi 830046, China.
⁶ State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing 100029, China.
⁷ State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
⁸ College of Chemistry, Liaoning University, Shenyang 110036, China; Department of Chemical and Environmental Engineering, Yingkou Institute of Technology, Yingkou 115014, China. Electronic address: [email protected].

PMID: 35459517
DOI: 10.1016/j.jes.2021.08.008

Abstract

The field observation of 54 non-methane hydrocarbon compounds (NMHCs) was conducted from September 1 to October 20 in 2020 during autumn in Haidian District, Beijing. The mean concentration of total NMHCs was 29.81 ± 11.39 ppbv during this period, and alkanes were the major components. There were typical festival effects of NMHCs with lower concentration during the National Day. Alkenes and aromatics were the dominant groups in ozone formation potential (OFP) and OH radical loss rate (L_OH). The positive matrix factorization (PMF) running results revealed that vehicular exhaust became the biggest source in urban areas, followed by liquefied petroleum gas (LPG) usage, solvent usage, and fuel evaporation. The box model coupled with master chemical mechanism (MCM) was applied to study the impacts of different NMHCs sources on ozone (O₃) formation in an O₃ episode. The simulation results indicated that reducing NMHCs concentration could effectively suppress O₃ formation. Moreover, reducing traffic-related emissions of NMHCs was an effective way to control O₃ pollution at an urban site in Beijing.

Keywords: Festival effects; Master chemical mechanism; Non-methane hydrocarbon compounds; Ozone; Source apportionment.

MeSH terms

Air Pollutants* / analysis
Beijing
China
Environmental Monitoring / methods
Hydrocarbons / analysis
Methane
Ozone* / analysis
Vehicle Emissions / analysis
Volatile Organic Compounds* / analysis

Substances

Air Pollutants
Hydrocarbons
Vehicle Emissions
Volatile Organic Compounds
Ozone
Methane