'Measurements of OVOCs and NMHCs in a Swiss Highway Tunnel for Estimation of Road Transport Emissions

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• 作者：Geir Legreid ; Stefan Reimann ; Martin Steinbacher ; Johannes Staehelin ; Dickon Young ; Konrad Stemmler
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：October 15, 2007
• 年：2007
• 卷：41
• 期：20
• 页码：7060 - 7066
• 全文大小：172K
• 年卷期：v.41,no.20(October 15, 2007)
• ISSN：1520-5851

文摘

Eighteen oxygenated volatile organic compounds (OVOCs)and eight nonmethane hydrocarbons (NMHCs) weremeasured continuously during a two-week campaign in2004 in the Gubrist highway tunnel (Switzerland). The studyaimed to estimate selected OVOC and NMHC emissionsof the current vehicle fleet under highway conditions. Forthe measured OVOCs the highest EFs were found forethanol (9.7 mg/km), isopropanol (3.2 mg/km), andacetaldehyde (2.5 mg/km), followed by acetone, benzaldehyde,and acrolein. Formaldehyde, the most abundant OVOCmeasured in other studies, was not measured by the methodapplied. Relative emissions of the measured OVOCswere estimated to contribute approximately 6 and 4% tothe total road traffic VOC emissions from Switzerland andEurope, respectively. Results are compared with thosefrom previous studies from the same tunnel performed in1993 and 2002, and from campaigns in other tunnels. Acontinuous reduction in the emission factors (EFs) wasdetermined for all measured compounds from 1993 until 2004.The relative contributions of light-duty vehicles (LDV)and heavy-duty vehicles (HDV) to the total emissionsindicated that OVOCs were mainly produced by the HDVs,whereas LDVs dominated the production of the NMHCs.