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Environ Pollut

Title:		"Multi-scale volatile organic compound (VOC) source apportionment in Tianjin, China, using a receptor model coupled with 1-hr resolution data"
Author(s):		Gu Y; Liu B; Li Y; Zhang Y; Bi X; Wu J; Song C; Dai Q; Han Y; Ren G; Feng Y;
Address:		"State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control & Tianjin Key Laboratory of Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China. State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control & Tianjin Key Laboratory of Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China. Electronic address: 8226844@nankai.edu.cn. School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK. Ying Da Chang An Insurance Brokers Group CO., LTD, Beijing, 100052, China"
Journal Title:		Environ Pollut
Year:		2020
Volume:		20200617
Issue:		Pt A
Page Number:		115023 -
DOI:		10.1016/j.envpol.2020.115023
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"The multi-scale chemical characteristics and source apportionment of volatile organic compounds (VOCs) were analysed in Tianjin, China, using 1-hr resolution VOC-species data between November 1, 2018 and March 15, 2019. The average total VOC (TVOC) concentration was 30.6 ppbv during the heating season. The alkanes accounted for highest proportion of the TVOC, while the alkenes were the predominant species forming ozone, especially ethylene. Compared to the clean period, the concentration of acetylene during the haze events showed highest increase rate, followed by the ethane; and the concentrations and proportions of alkanes and alkenes were highest during the growth stage (GS) of haze events. The multi-scale apportionment results suggested petrochemical industry and solvent usage (PI/SU, 31.2%), vehicle emissions and liquefied petroleum gas (VE/LPG, 20.5%), and combustion emissions (CE, 19.1%) were the main VOC sources during the heating season. Compared to the clean period, the contributions of PI/SU, VE/LPG, CE, and refinery emissions notably increased during the haze events, while that of gasoline evaporation decreased. The contributions of PI/SU and RPI showed significantly increase during the GS of haze events, whereas most sources decreased during the dissipation stage of haze events. Diurnal-variations in source contributions during the haze events were clearer than the clean period, and the contributions of PI/SU, VE/LPG, and CE during the haze events were markedly higher at night. These findings provide valuable information to inform effective VOC control and prevention measures with specific relevance for the control of ozone pollution in Tianjin"
Keywords:		Air Pollutants/*analysis China Environmental Monitoring Vehicle Emissions/analysis Volatile Organic Compounds/*analysis Multi-scale dynamics Positive matrix factorisation Source apportionment Voc;
Notes:		"MedlineGu, Yao Liu, Baoshuang Li, Yafei Zhang, Yufen Bi, Xiaohui Wu, Jianhui Song, Congbo Dai, Qili Han, Yan Ren, Ge Feng, Yinchang eng England 2020/07/01 Environ Pollut. 2020 Oct; 265(Pt A):115023. doi: 10.1016/j.envpol.2020.115023. Epub 2020 Jun 17"