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Huan Jing Ke Xue

Title:		[Chemical Reaction Activity and Source Apportionment of Atmospheric VOCs in Summer in Dalian]
Author(s):		Zhu KX; Liu LZ; Liu HW; Luo JQ; Gao RR;
Address:		"School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Xi'an Environmental Monitoring Station, Xi'an 710119, China"
Journal Title:		Huan Jing Ke Xue
Year:		2022
Volume:		43
Issue:		8
Page Number:		3944 - 3952
DOI:		10.13227/j.hjkx.202110235
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"To investigate the characteristics and source apportionment of atmospheric volatile organic compounds (VOCs) in Dalian, the concentration level, composition characteristics, reaction activity, and source apportionment of atmospheric VOCs in Dalian were analyzed based on high-resolution online observation VOCs data from June to August 2020. The results showed that the average phi(VOCs) was (10.21+/-5.71)x10(-9), in which alkanes accounted for 66.35%, alkenes for 11.89%, alkynes for 7.75%, and aromatics for 14.01%. VOCs and NO(x) were high at night and low during the day, whereas the change trend of O(3) was opposite. Considering the species activity, it was determined that toluene, ethylene, m/p-xylene, 1-hexene, n-butane, isopentane, n-pentane, and isoprene were the key species affecting atmospheric VOCs in Dalian. Priority control of olefin and aromatic hydrocarbon emissions is the key to improve O(3) pollution in summer in Dalian. By applying the positive matrix factorization (PMF) model, six major VOCs sources were extracted, namely traffic sources (26.38%), combustion sources (22.75%), industrial emission sources (17.09%), solvent usage sources (14.59%), natural sources (11.72%), and others (7.47%). The emissions of traffic sources and combustion sources are the key pollution sources for O(3) prevention and control in Dalian in summer"
Keywords:		*Air Pollutants/analysis China Environmental Monitoring *Ozone/analysis Seasons Vehicle Emissions/analysis *Volatile Organic Compounds/analysis Dalian characteristics chemical activity positive matrix factorization (PMF) volatile organic compounds (VOCs);
Notes:		"MedlineZhu, Ke-Xin Liu, Li-Zhong Liu, Huan-Wu Luo, Jing-Qi Gao, Ran-Ran chi China 2022/08/17 Huan Jing Ke Xue. 2022 Aug 8; 43(8):3944-3952. doi: 10.13227/j.hjkx.202110235"