| Title: | "[Characteristics of VOCs and Formation Potentials of O(3) and SOA in Autumn and Winter in Tongchuan, China]" |
| Author(s): | Yi XX; Li JH; Li GH; Lu ZZ; Sun ZG; Gao J; Deng SX; |
| Address: | "School of Water and Environment, Chang'an University, Xi'an 710064, China. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710064, China" |
| DOI: | 10.13227/j.hjkx.202104180 |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) are the main precursors of tropospheric O(3) and secondary organic aerosol (SOA), which can enhance atmospheric oxidation, promote the formation of secondary pollutants, and affect regional air quality and human health. In order to gain insights on VOCs characteristics and their potentials for O(3) and SOA formation, the volume fraction of 102 VOCs in autumn and winter in the urban area of Tongchuan were monitored using the TH-300B online monitoring system. The maximum incremental reactivity (MIR) coefficient and the fractional aerosol coefficient (FAC) were used to estimate the ozone formation potential (OFP) and SOA formation potential (SOAFP), respectively. The phi(TVOC, total VOCs) were (50.52+/-16.81)x10(-9) in autumn and (63.21+/-35.24)x10(-9) in winter. The OFPs were 138.43x10(-9) in autumn and 137.123x10(-9) in winter, and the SOAFPs were 3.098 mug.m(-3) and 0.612 mug.m(-3), respectively. Alkanes (26.19%) and aromatics (26.04%) were the most abundant species in autumn, and alkanes (48.88%) were the most abundant species in winter. Trans-2-pentene, toluene, and m/p-xylene were the most reactive species in terms of OFPs in autumn, and ethylene, acetylene, and propylene were the top three species contributing to the total OFPs in winter. Toluene, m/p-xylene, and ethylbenzene contributed the most to the total SOAFPs in both of autumn and winter. Traffic emissions were considered as the major source of VOCs in both seasons. VOCs from biomass/coal combustion emissions showed seasonal differences, which were more prominent in winter. The results can provide references for the 'one city, one policy' to mitigate regional VOCs pollution and improve ambient air quality" |
| Keywords: | Aerosols/analysis *Air Pollutants/analysis China Environmental Monitoring Humans *Ozone/analysis Seasons *Volatile Organic Compounds/analysis Tongchuan ozone formation potential(OFP) ozone(O3) secondary organic aerosol(SOA) volatile organic compounds(VOCs; |
| Notes: | "MedlineYi, Xiao-Xiao Li, Jiang-Hao Li, Guang-Hua Lu, Zhen-Zhen Sun, Zhi-Gang Gao, Jian Deng, Shun-Xi chi China 2022/01/07 Huan Jing Ke Xue. 2022 Jan 8; 43(1):140-149. doi: 10.13227/j.hjkx.202104180" |
