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Huan Jing Ke Xue

Title:		[Pollution and source of atmospheric volatile organic compounds in urban-rural juncture belt area in Beijing]
Author(s):		Zhou YM; Hao ZP; Wang HL;
Address:		"Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zym8496@163.com"
Journal Title:		Huan Jing Ke Xue
Year:		2011
Volume:		32
Issue:		12
Page Number:		3560 - 3565
DOI:
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"A method for determining volatile organic compounds (VOCs) by cryogenic dynamic adsorption in solid adsorbent tubes, subsequent thermal desorption with cryofocusing in a cold trap and analysis by gas chromatography and mass spectrometry was adapted. Volatile organic content levels, spatial and temporal distribution and sources were studied. Results indicated that 265 species were detected in atmospheric environment of this area, including alkanes, alkenes, aromatics, halohydrocarbons and oxygenated compounds. The average concentration of VOCs is 431.7 microg x m(-3), followed by aromatics 248.1 microg x m(-3), alkanes 130.5 microg x m(-3) alkenes 11.7 microg x m(-3), halohydrocarbons 22.4 microg x m(-3), oxygenated compounds 18.6 microg x m(-3), respectively. Benzene, toluene, ethylbenzene, xylene and so on have a comparatively high content. Aromatics and alkanes are the most abundant VOCs; Organic pollutants generally occurred at a relatively high level in the morning and evening traffic rush hours. VOCs varied with seasons: winter maximum, followed by autumn, summer minimum. Source analysis showed that atmospheric VOCs mainly come from vehicular exhaust, gasoline evaporation, use of adhesive and solvent and vegetation emission. They accounted for 53.4%, 20.1%, 11.0% and 5.93%, respectively"
Keywords:		"Air Pollutants/*analysis Alkanes/analysis Alkenes/analysis Atmosphere/analysis China *Environmental Monitoring/methods Hydrocarbons, Halogenated/analysis Vehicle Emissions/analysis Volatile Organic Compounds/*analysis;"
Notes:		"MedlineZhou, Yu-Min Hao, Zheng-Ping Wang, Hai-Lin chi English Abstract Research Support, Non-U.S. Gov't China 2012/04/04 Huan Jing Ke Xue. 2011 Dec; 32(12):3560-5"