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Huan Jing Ke Xue

Title:		[Variation Characteristics of Ambient Volatile Organic Compounds (VOCs) Volume Fraction During Hangzhou COVID-19 Period]
Author(s):		Lin X; Yan RC; Jin JJ; Xu KE; He X; Ye H; He JP;
Address:		"Hangzhou Ecological Environment Monitoring Center, Hangzhou 310007, China"
Journal Title:		Huan Jing Ke Xue
Year:		2022
Volume:		43
Issue:		1
Page Number:		123 - 131
DOI:		10.13227/j.hjkx.202103202
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"A continuous observation campaign was carried out with the Syntech Spectras GC955 volatile organics online monitoring system from December 1, 2019 to March 31, 2020 during the COVID-19 period in Hangzhou. Composition characteristics, diurnal variation, and atmospheric chemical reactivity of VOCs were analyzed. The results showed that phi(total VOCs) were the highest before the COVID-19 pandemic in different sites and the lowest during the first response period. The phi(total VOCs) at night was higher than that during the day. The daily variation in Wolongqiao phi(total VOCs) was less than that in Xiasha. The daily variation in phi(total VOCs) during the first level response period was less than that during the other three periods. The diurnal variation in the phi (total VOCs) in Xiasha showed a 'V' shape, and that in Wolongqiao showed a typical bimodal structure. The OFP in Xiasha was higher than that in Wolongqiao. The OFP were the highest at the two sites before the COVID-19 pandemic. The OFP was the lowest during the first response period in Xiasha and the lowest during the second response period in Wolongqiao. The OFP of aromatics and olefins was higher, and the OFP of alkynes was the lowest in Xiasha. The OFP of olefin in Wolongqiao was much higher than that of the other three components, followed by alkane and alkyne"
Keywords:		*Air Pollutants/analysis *covid-19 China Environmental Monitoring Humans *Ozone/analysis Pandemics SARS-CoV-2 *Volatile Organic Compounds/analysis Covid-19 chemical reactivity daily variation ozone formation potential(OFP) volatile organic compounds (VOCs;
Notes:		"MedlineLin, Xu Yan, Ren-Chang Jin, Jia-Jia Xu, Kai-Er He, Xi Ye, Hui He, Ji-Ping chi China 2022/01/07 Huan Jing Ke Xue. 2022 Jan 8; 43(1):123-131. doi: 10.13227/j.hjkx.202103202"