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J Environ Sci (China)

Title:		"The levels, sources and reactivity of volatile organic compounds in a typical urban area of Northeast China"
Author(s):		Ma Z; Liu C; Zhang C; Liu P; Ye C; Xue C; Zhao D; Sun J; Du Y; Chai F; Mu Y;
Address:		"Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: clzhang@rcees.ac.cn. Shenyang Academy of Environmental Sciences, Shenyang 110167, China. Shenyang Environmental Monitoring Centre, Shenyang 110000, China. Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: yjmu@rcees.ac.cn"
Journal Title:		J Environ Sci (China)
Year:		2019
Volume:		20181130
Issue:
Page Number:		121 - 134
DOI:		10.1016/j.jes.2018.11.015
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Air concentrations of volatile organic compounds (VOCs) were continually measured at a monitoring site in Shenyang from 20 August to 16 September 2017. The average concentrations of alkanes, alkenes, aromatics and carbonyls were 28.54, 6.30, 5.59 and 9.78 ppbv, respectively. Seven sources were identified by the Positive Matrix Factorization model based on the measurement data of VOCs and CO. Vehicle exhaust contributed the most (36.15%) to the total propene-equivalent concentration of the measured VOCs, followed by combustion emission (16.92%), vegetation emission and secondary formation (14.33%), solvent usage (10.59%), petrochemical industry emission (9.89%), petrol evaporation (6.28%), and liquefied petroleum gas (LPG) usage (5.84%). Vehicle exhaust, solvent usage and combustion emission were found to be the top three VOC sources for O(3) formation potential, accounting for 34.52%, 16.55% and 11.94%, respectively. The diurnal variation of the total VOCs from each source could be well explained by their emission characteristics, e.g., the two peaks of VOC concentrations from LPG usage were in line with the cooking times for breakfast and lunch. Wind rose plots of the VOCs from each source could reveal the possible distribution of the sources around the monitoring site. The O(3) pollution episodes during the measurement period were found to be coincident with the elevation of VOCs, which was mainly due to the air parcel from the southeast direction where petrochemical industry emission was found to be dominant, suggesting that the petrochemical industry emission from the southeast was probably a significant cause of O(3) pollution in Shenyang"
Keywords:		Air Pollutants/*analysis China Cities Environmental Monitoring Hydrocarbons/*analysis Oil and Gas Industry Ozone/*analysis Solvents Vehicle Emissions Volatile Organic Compounds/*analysis Field measurement Photochemical ozone formation Source apportionment;
Notes:		"MedlineMa, Zhuobiao Liu, Chengtang Zhang, Chenglong Liu, Pengfei Ye, Can Xue, Chaoyang Zhao, Di Sun, Jichen Du, Yiming Chai, Fahe Mu, Yujing eng Netherlands 2019/02/21 J Environ Sci (China). 2019 May; 79:121-134. doi: 10.1016/j.jes.2018.11.015. Epub 2018 Nov 30"