Analysis of pollution characteristics and emission source variations of VOCs in Lanzhou's main urban area during typical seasons

JIAO Wendu; TONG Jilong; WANG Shusu; KANG Zhengbo

doi:10.13205/j.hjgc.202609015

Volume 44 Issue 9

Sep. 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(9): 137-148

JIAO Wendu, TONG Jilong, WANG Shusu, KANG Zhengbo. Analysis of pollution characteristics and emission source variations of VOCs in Lanzhou's main urban area during typical seasons[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(9): 137-148. doi: 10.13205/j.hjgc.202609015

Citation:

JIAO Wendu, TONG Jilong, WANG Shusu, KANG Zhengbo. Analysis of pollution characteristics and emission source variations of VOCs in Lanzhou's main urban area during typical seasons[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(9): 137-148. doi: 10.13205/j.hjgc.202609015

Citation:

JIAO Wendu, TONG Jilong, WANG Shusu, KANG Zhengbo. Analysis of pollution characteristics and emission source variations of VOCs in Lanzhou's main urban area during typical seasons[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(9): 137-148. doi: 10.13205/j.hjgc.202609015

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Analysis of pollution characteristics and emission source variations of VOCs in Lanzhou's main urban area during typical seasons

doi: 10.13205/j.hjgc.202609015

College of Atmospheric Science, Lanzhou University, Lanzhou 730000, China

Received Date: 2025-07-26
Available Online: 2026-11-05

Abstract

Abstract

To investigate the pollution characteristics and source variations of volatile organic compounds （VOCs） in Lanzhou's main urban area， hourly VOCs concentration data for 2021， 2022， and the first quarter of 2023 from the Atmospheric Composition Superstation at Lanzhou University were analyzed， and source apportionment was conducted using the positive matrix factorization （PMF） model. The analysis of pollution characteristics revealed that the annual average VOCs concentrations in Lanzhou's main urban area were 121.51 μg/m³ in 2021 and 104.43 μg/m³ in 2022. Oxygenated compounds， alkanes， and halogenated hydrocarbons were the dominant components of VOCs， collectively accounting for over 80% of the total VOCs composition. VOCs pollution exhibited seasonal variation， with lower concentrations in spring and summer and higher concentrations in autumn and winter. Most VOCs reached their peak concentrations in winter. The source apportionment results indicated that VOCs emissions in Lanzhou's main urban area were derived from six major sources： fuel combustion， industrial solvent use， transportation emissions， industrial production， petrochemical processing， and oil volatilization. The three major emission sources of VOCs were fuel combustion， industrial solvent use， and transportation emissions. The source apportionment results for typical seasons showed that industrial solvent use was the dominant emission source in summer， though its contribution share in 2022 decreased compared to 2021. Fuel combustion was the dominant emission source during the heating season， and its contribution share during the heating seasons of 2022-2023 increased significantly compared to the heating seasons of 2021-2022. These findings provide a basis for relevant authorities to formulate VOCs control policies.
- VOCs,
- pollution characteristics,
- PMF model,
- source apportionment technique

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References(31)

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