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Huan Jing Ke Xue

Title:		[Source profile and chemical reactivity of volatile organic compounds from vehicle exhaust]
Author(s):		Qiao YZ; Wang HL; Huang C; Chen CH; Su LY; Zhou M; Xu H; Zhang GF; Chen YR; Li L; Chen MH; Huang HY;
Address:		"Shanghai Academy of Environmental Sciences, Shanghai 200233, China. qiaoyuezhen@hotmail.com"
Journal Title:		Huan Jing Ke Xue
Year:		2012
Volume:		33
Issue:		4
Page Number:		1071 - 1079
DOI:
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"Light-duty gasoline taxis (LDGT) and passenger cars (LDGV), heavy-duty diesel buses (HDDB) and trucks (HDDT), gasoline motorcycles (MC) and LPG scooters (LPGS), were selected for tailpipe volatile organic compounds (VOCs) samplings by using transient dynamometer and on road test combined with SUMMA canisters technology. The samples were tested by GC-MS to analyze the concentration and species composition of VOCs. The results indicate that light-duty gasoline automobiles have higher fractions of aromatic hydrocarbons, which account for 43.38%-44.45% of the total VOCs, the main aromatic hydrocarbons are toluene and xylenes. Heavy-duty diesel vehicles have higher fractions of alkanes, which constitute 46.86%-48.57% of the total VOCs, the main alkanes are propane, n-dodecane and n-undecane. In addition, oxy-organics account for 13.28%-15.01% of the VOCs, the main oxy-organics is acetone. The major compound from MC and LPGS exhaust is acetylene, it accounts for 39.75% and 76.67% of the total VOCs, respectively. VOCs exhaust from gasoline motorcycles and light-duty gasoline automobiles has a significantly higher chemical reactivity than those from heavy-duty diesel vehicles, which contribute 55% and 44% to the atmospheric chemical reactivity in Shanghai. The gasoline motorcycles and light-duty gasoline automobiles are the key pollution sources affecting city and region ambient oxidation, and the key active species of toluene, xylenes, propylene, and styrene make the greatest contribution"
Keywords:		Air Pollutants/*analysis Alkenes/analysis China Cities Environmental Monitoring Toluene/analysis Vehicle Emissions/*analysis Volatile Organic Compounds/*analysis/chemistry Xylenes/analysis;
Notes:		"MedlineQiao, Yue-Zhen Wang, Hong-Li Huang, Cheng Chen, Chang-Hong Su, Lei-Yan Zhou, Min Xu, Hua Zhang, Gang-Feng Chen, Yi-Ran Li, Li Chen, Ming-Hua Huang, Hai-Ying chi Research Support, Non-U.S. Gov't China 2012/06/23 Huan Jing Ke Xue. 2012 Apr; 33(4):1071-9"