典型工业城市长治市夏季大气挥发性有机物来源及对臭氧生成贡献

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Abstract In this study, taking Changzhi as a typical industrial city, the source apportionment of Volatile Organic Compounds (VOCs) was carried out used positive definite matrix factorization (PMF) model, and the atmospheric photochemical reaction process and O₃ formation sensitivity were analyzed based on an observation-based model (AtChem-MCM). The results showed that the concentrations of alkanes, alkenes, alkynes and aromatics accounted for 57.49%, 16.05%, 9.17% and 17.29% of TVOC in Changzhi, respectively. PMF results showed that vehicle emission was the major source of VOCs (28.45%), followed by industrial process (26.19%), combustion sources (21.09%), biogenic sources (12.99%) and solvent utilization (11.28%). The simulation results of O₃ formation showed that the average net formation rate of O₃ during daytime was 23.01×10^-9h^-1, which reached a peak value (54.32 ×10^-9h^-1) at 11o'clock. The formation of O₃ in Changzhi was sensitive to both VOCs and NO_x, and alkene (1.05) and NO_x (0.35) had the higher relative incremental reaction activity coefficients (RIR). Industrial process (0.072), solvent utilization (0.071) and vehicle emissions (0.068) had the higher RIR value, which were the key sources contributed to O₃ formation. Therefore, industrial process and vehicles emissions should be strengthen for the control of O₃ in industrial cities.

Key words： volatile organic compounds source apportionment atmospheric box model ozone sensitivity analysis

Received: 03 January 2024

PACS:

X511

Corresponding Authors: 闫雨龙,教授,yanyulong@bjtu.edu.cn;彭林,教授,penglin6611@163.com E-mail: yanyulong@bjtu.edu.cn;penglin6611@163.com

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	XING Yi-ran
	NIU Yue-yuan
	YAN Yu-long
	PENG Lin
	DONG Jia-qi
	YUE Ke

Cite this article:

XING Yi-ran,NIU Yue-yuan,YAN Yu-long等. The sources of volatile organic compounds in the summer atmosphere and the contribution to ozone generation in Changzhi, a typical industrial city[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(8): 4202-4210.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I8/4202

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