Pollution Characteristics and Reactivity of Volatile Organic Compounds in Shenyang

被引：0
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作者：
Du H.-B. [1 ]
Wang N. [2 ]
Ren W.-H. [2 ]
Su C.-C. [2 ]
Hu J.-L. [3 ]
Yu X.-N. [1 ]
机构：
[1] Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing
[2] Shenyang Ecological and Environmental Monitoring Center of Liaoning Province, Shenyang
[3] Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing
来源：
Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 12期
关键词：
Chemical reactivity; Concentration characteristics; Ozone formation potential(OFP); Volatile organic compounds(VOCs); •OH loss rate;
D O I：
10.13227/j.hjkx.202103184
中图分类号：
学科分类号：
摘要：
The atmospheric volatile organic compounds (VOCs) in Shenyang were observed in 2019, and the concentration characteristics and reactivity of 53 species were studied. The results showed that the average concentration of VOCs was 65.33 μg•m-3, and the proportions of alkanes, olefins, and aromatics were 62.44%, 16.52%, and 19.32%, respectively. The top ten species of VOCs were primarily C3-C5 alkanes, olefins, and some aromatics, accounting for 64.13% of the total VOCs. The concentrations of alkanes, alkenes, and aromatics in Shenyang showed a bimodal diurnal variation trend, with the peak values at 06:00-08:00 and 19:00-20:00 and the lowest values at 14:00-15:00. The highest (136.44 μg•m-3) and the lowest (35.61 μg•m-3) ρ(VOCs) occurred in December and May, respectively. The concentrations of VOCs showed an obvious seasonal variation: winter>autumn>summer>spring. In addition, alkanes, olefins, and aromatics showed an increasing trend with the seasons. Through the value of toluene/benzene (T/B), it was found that VOCs in Shenyang mainly come from traffic and combustion sources in spring, vehicle exhaust and solvent volatilization in summer, and biomass combustion and coal combustion in autumn and winter. It was found that combustion sources were the key to controlling ozone pollution in Shenyang, and propylene, ethylene, and 1-hexene are the most reactive species in atmospheric VOCs in Shenyang based on the analysis of reaction activity. © 2021, Science Press. All right reserved.
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页码：5656 / 5662
页数：6
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