城市内挥发性有机化合物(VOCs)的成份分析及其来源识别

Composition Analysis and Source Identification of Volatile Organic Compounds (VOCs) in Cities

经过两年的对地区的连续追踪研究,测量挥发性有机化合物的体积混合比。发现最多的物质是乙烷和甲苯,其中烷烃和芳烃分别占比达到总挥发性有机化合物的57.5%和31.5%。经过成份分析,交通排放物是主要的城市挥发性有机化合物来源,分析还表明主要是液化石油/天然气/汽油、柴油等混合溶剂燃烧产生的污染。本研究表明了城市内挥发性有机化合物的潜在影响。

After two years of continuous regional tracking research,the volume mixing ratio of volatile organic compounds was measured.Ethane and toluene are the most frequently found substances,among which alkanes and aromatic hydrocarbons account for 57.5%and 31.5%of the total volatile organic compounds,respectively.Through composition analysis,traffic emissions are the main source of urban volatile organic compounds.The analysis also shows that the pollution is mainly caused by the burning of mixed solvents such as liquefied petroleum/natural gas/gasoline and diesel.This study shows the potential impact of volatile organic compounds in cities.