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Environ Monit Assess

Title:		"Volatile hydrocarbon emissions from vehicles and vertical ventilations in the Hsuehshan traffic tunnel, Taiwan"
Author(s):		Lai CH; Peng YP;
Address:		"Department of Safety, Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan, Republic of China. chlai2@ctust.edu.tw"
Journal Title:		Environ Monit Assess
Year:		2012
Volume:		20110806
Issue:		7
Page Number:		4015 - 4028
DOI:		10.1007/s10661-011-2240-2
ISSN/ISBN:		1573-2959 (Electronic) 0167-6369 (Linking)
Abstract:		"The concentrations of 56 volatile organic hydrocarbons (VOCs) were measured simultaneously in the southbound bore, the northbound bore and the exhaust air shafts of the Hsuehshan tunnel near Yilan, Taiwan during 2007 and 2008. A total of 60 integrated air samples were collected using stainless steel canisters and analyzed using GC/FID and GC/MS. The highest temperature and lowest relative humidity were observed at the exit of the tunnel owing to the accumulation in the tunnel of waste heat that was exhausted from vehicles. The five most abundant species in all samples were ethylene, acetylene, isopentane, propylene, and toluene. The exit/entrance ratios of total non-methane hydrocarbon (NMHC) concentration were 7.8 and 4.8 for the southbound and northbound bores, respectively. Furthermore, the most abundant species of emission rate (ER) is toluene (21.93-42.89 mg s(-1)), followed by isopentane, ethylene, propylene and 1-butene, with ER ranging from 2.50 to 9.31 mg s(-1) for the three shafts. The ozone formation potential (OFP)/total NMHC ratios in three exhaust air shafts show that the reactivities of these emissions are similar to those of vehicle emissions"
Keywords:		Air Pollutants/*analysis Air Pollution/statistics & numerical data Alkenes/analysis Automobiles/statistics & numerical data Environmental Monitoring Gas Chromatography-Mass Spectrometry Hydrocarbons/*analysis Taiwan Vehicle Emissions/*analysis Ventilation;
Notes:		"MedlineLai, Chia-Hsiang Peng, Yen-Ping eng Research Support, Non-U.S. Gov't Netherlands 2011/08/09 Environ Monit Assess. 2012 Jul; 184(7):4015-28. doi: 10.1007/s10661-011-2240-2. Epub 2011 Aug 6"