铜川市新区大气挥发性有机物季节性来源解析

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Abstract This study aims to investigate the VOCs pollution characteristics in the high-tech industrial zone of Tongchuan City, a medium-sized city in the Fenwei Plain, by using online monitoring methods to measure the concentration of environmental VOCs components (a total of 115species) in the atmosphere of the Tongchuan High-tech Industrial Development Zone, thereby obtaining a high-resolution time series and seasonal variation patterns of atmospheric VOCs.The Positive Matrix Factorization (PMF) model was utilized to identify the primary sources of VOCs, and the Maximum Incremental Reactivity (MIR) method was applied to quantify the Ozone Formation Potential (OFP) of VOCs. Furthermore, the Hazard Index (HI) and Lifetime Cancer Risk (LCR) of toxic VOCs were calculated. The findings revealed that during the monitoring period, the average values of φ (TVOCs) in spring, summer, and winter were respectively (69.03 ± 47.48)×10^-9, (92.66 ± 37.54)×10^-9, and (134.90 ± 74.58)×10^-9, with the top three components in each season being consistent (alkanes > alkenes > aromatics). PMF source apportionment results indicated that the sources of atmospheric VOCs in the development zone were primarily from chemical companies, motor vehicles, and combustion emissions (each contributing over 20%). OFP assessment outcomes revealed that OVOCs were the major contributing components in all seasons, with ethanol, acetaldehyde, and ethylene being the primary species. Health risk assessments indicated that the HI in spring, summer, and winter all exceeded acceptable levels (HI > 1), suggesting non-carcinogenic health risks to the exposed population. Acrolein, in particular, had a notably high hazard index, exceeding 1in all seasons. The lifetime cancer risks in spring, summer, and winter were 1.68×10^-5, 1.57×10^-5, and 8.42×10^-5, respectively, indicating a slight carcinogenic risk in all seasons.

Key words： Tongchuan high-tech industrial development zone volatile organic compounds (VOCs) component analysis source analysis health risk assessment

Received: 01 June 2024

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X51

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	ZHANG Li-yuan
	ZHANG Ya-nan
	ZHONG Jia-hao
	GUO Wei
	ZHANG Yue
	WANG Jian-yue
	WU Wei-peng
	BO Ya-nan

Cite this article:

ZHANG Li-yuan,ZHANG Ya-nan,ZHONG Jia-hao等. Seasonal source analysis of atmospheric volatile organic compounds (VOCs) in Tongchuan high-tech industrial development zone[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 93-102.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I1/93

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