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J Environ Sci (China)

Title:		Source apportionment of VOCs in a typical medium-sized city in North China Plain and implications on control policy
Author(s):		Qin J; Wang X; Yang Y; Qin Y; Shi S; Xu P; Chen R; Zhou X; Tan J; Wang X;
Address:		"College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China. Electronic address: zhouxueming14@mails.ucas.ac.cn. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: tanjh@ucas.ac.cn. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China"
Journal Title:		J Environ Sci (China)
Year:		2021
Volume:		20210206
Issue:
Page Number:		26 - 37
DOI:		10.1016/j.jes.2020.10.005
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Characteristics of atmospheric VOCs (volatile organic compounds) have been extensively studied in megacities in China, however, they are scarcely investigated in medium/small-sized cities in North China Plain (NCP). A comprehensive research on possible sources of VOCs was conducted in a medium-sized city of NCP, from May to September 2019. A total of 143 canister samples of 8 sites in Xuchang city were collected, and 57 VOC species were detected. The average VOC concentrations were 42.6 +/- 31.6 mug/m(3), with 53.7 +/- 31.0 mug/m(3) and 32.1 +/- 27. 8 mug/m(3), in the morning and afternoon, respectively. Alkenes and aromatics contributed 80% of the total ozone formation potential (OFP). Aromatics accounted for more than 95% of secondary organic aerosol potential (SOAP). VOCs were dominated by the local emission with significant transport from the southeast direction. PMF analysis extracted 6 sources, which were combustion (33.1%), LPG usage (19.3%), vehicular exhaust & fuel evaporation (15.8%), solvent usage (15.2%), industrial (9.11%) and biogenic (7.51%), respectively and they contributed 33.4%, 17.6%, 12.9%, 18.6%, 9.28% and 8.22% to the OFP, respectively. Combustion and LPG usage were the dominant VOC sources; and combustion, solvent usage and LPG usage were the main sources of OFP in Xuchang city, which were different to megacities in China with a high contribution from vehicular exhaust, solvent usage and industry, suggesting specific control strategies on VOCs need to be implemented in medium-sized city such as Xuchang city"
Keywords:		*Air Pollutants/analysis China Cities Environmental Monitoring Policy Medium-sized city Ozone Positive matrix factorization Source apportionment Volatile organic compounds;
Notes:		"MedlineQin, Juanjuan Wang, Xiaobo Yang, Yanrong Qin, Yuanyuan Shi, Shaoxuan Xu, Peihua Chen, Rongzhi Zhou, Xueming Tan, Jihua Wang, Xinming eng Netherlands 2021/08/21 J Environ Sci (China). 2021 Sep; 107:26-37. doi: 10.1016/j.jes.2020.10.005. Epub 2021 Feb 6"