Abstract
The observation and analysis of volatile organic compounds (VOCs) were conducted during January 2018 in nine prefecture-level cities of Sichuan, China, covering the period of heavily polluted weather. Air samples collected in nine prefecture-level cities were analyzed using a preconcentration method coupled with GC-MS/FID. The characteristics and ozone generation potential (OFP) of VOCs were analyzed. The relationship between air quality index (AQI) and VOCs and gross domestic product (GDP) and VOCs were also discussed, respectively. The results show that the characteristics of VOCs in cities are highly related to their industrial structure and GDP. Generally, areas with high AQI values are accompanied by high VOC concentrations. Alkanes and halocarbons were the most abundant VOCs in the atmospheric environment in the nine prefecture-level cities, accounting for 24.5~61.6% and 15.6~23.6% of total VOC concentration, respectively. The MIR method was used to analyze the OFP, and olefins contributed the most to ozone formation. Among the nine cities located in Sichuan, Dazhou was found to be the city with the highest OFP value (1191.49 μg/m3).
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Acknowledgments
We would like to thank Analytical and Testing Center of Southwest Jiaotong University and Jiangsu Provincial Key Laboratory of Vehicle Emissions Control for the experimental conditions.
Funding
The work was financially supported by National Natural Science Foundation of China (No. 21777131 and No. 21677117), Ministry of Science and Technology of China (2018YFC0214003, 2016YFC0200405), and the open fund of Jiangsu Provincial Key Laboratory of Vehicle Emissions Control.
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Wang, W., Xiong, T., Zhang, W. et al. Observation and analysis of VOCs in nine prefecture-level cities of Sichuan Province, China. Environ Monit Assess 192, 511 (2020). https://doi.org/10.1007/s10661-020-08360-9
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DOI: https://doi.org/10.1007/s10661-020-08360-9