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Ecotoxicol Environ Saf

Title:		"Emission characteristics of 99 NMVOCs in different seasonal days and the relationship with air quality parameters in Beijing, China"
Author(s):		Gu Y; Li Q; Wei D; Gao L; Tan L; Su G; Liu G; Liu W; Li C; Wang Q;
Address:		"Key Laboratory of Environmental Nanotechnology and Health Effects, State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. China National Environmental Monitoring Center (CNEMC), No. 8 Anwai, Dayangfang, Chaoyang District, Beijing 100012, China. Electronic address: tanli@cnemc.cn. Key Laboratory of Environmental Nanotechnology and Health Effects, State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: gjsu@rcees.ac.cn"
Journal Title:		Ecotoxicol Environ Saf
Year:		2019
Volume:		20181129
Issue:
Page Number:		797 - 806
DOI:		10.1016/j.ecoenv.2018.11.091
ISSN/ISBN:		1090-2414 (Electronic) 0147-6513 (Linking)
Abstract:		"In recent years, the haze incidents have occurred frequently in China. Therefore, more attention should be taken in comprehensively determination and analysis of the extended-ranges of volatile organic compounds (VOCs). Here, up to 99 non-methane VOCs (NMVOCs), including not frequently reported partial halocarbons and oxygenated VOC (OVOC) species, were monitored in atmosphere of Beijing. The mean concentration of total NMVOC (TNMVOC) decreased in the order of winter polluted days (216.05?ª+mug?ª+m(-3))?ª+>?ª+summer polluted days (127.01?ª+mug?ª+m(-3))?ª+>?ª+summer normal days (95.63?ª+mug?ª+m(-3))?ª+>?ª+winter normal days (50.25?ª+mug?ª+m(-3)). The ethane to n-butane, ethylene to 1-butene, BTEX, acetaldehyde, acetone, n-hexanal, dichloromethane, chloroform and 1,2-dichloroethane, were determined to be the main composition in their respective alkane, alkene, aromatic, OVOC and halocarbon classes. The minor propylbenzene, diethylbenzene, ethyltoluene, and trimethylbenzene isomer ratios were within the narrow range of 1.3-3.21. Generally, the most abundant NMVOCs were alkanes in winter but OVOCs in summer. TNMVOC significantly positively correlated with PM(10), PM(2.5), CO, RH, SO(2) (winter), NO(2) (winter), but negatively with windspeed, SSD and PRS (winter). The opposite correlation was observed between TNMVOC and O(3) in winter and summer. There was no meaningful correlation between TNMVOC and T, PRS (summer), SO(2) (summer) and NO(2) (summer). 3D surface graphs, built by MATLAB, were drawn to investigate the relationship between PM(2.5) and NMVOC taking air quality parameters into account. The PM(2.5) concentration increased non-linearly as TNMVOC concentration increased, with various surface graphs. Unlike other air quality parameters, O(3) affected the relationship differently between winter and summer. The findings presented herein may provide a new train of thought for occurrence of haze"
Keywords:		Air Pollutants/*analysis/chemistry Air Pollution/*analysis Atmosphere/chemistry Beijing China *Environmental Monitoring Seasons Volatile Organic Compounds/*analysis/chemistry Air quality parameter Composition Non-methane volatile organic compounds Pollute;
Notes:		"MedlineGu, Yangyang Li, Qianqian Wei, Da Gao, Lirong Tan, Li Su, Guijin Liu, Guorui Liu, Wenbin Li, Chuanqi Wang, Qingliang eng Netherlands 2019/01/02 Ecotoxicol Environ Saf. 2019 Mar; 169:797-806. doi: 10.1016/j.ecoenv.2018.11.091. Epub 2018 Nov 29"