Hellén Heidi, Hakola Hannele, Pirjola Liisa, Laurila Tuomas, Pystynen Kati-Henna
Finnish Meteorological Institute, Erik Palménin aukio 1, 00560 Helsinki, Finland.
Environ Sci Technol. 2006 Jan 1;40(1):103-8. doi: 10.1021/es051659d.
Ambient air concentrations and source contributions of 71 volatile organic compounds (VOCs) including C2-C10 nonmethane hydrocarbons, halogenated hydrocarbons, and carbonyls were studied at urban and residential sites in Finland. On the basis of the emission profile and concentration measurements, the contributions of different sources were estimated using a chemical mass balance (CMB) receptor model. It was shown that it is possible to apply CMB in the case of a large number of different compounds with different properties. However, the performance of the model varies significantly for the different compounds. According to the CMB analysis, major sources for these VOCs at the urban site were traffic and distant sources. At the residential site, the contribution due to traffic was minor while distant sources, liquid gasoline, and wood combustion made higher contributions. However, different compound groups or compounds were found to have totally different sources. It was also shown that a biogenic compound, isoprene, also has significant anthropogenic sources and that at some locations wood combustion can be an important source for some VOCs usually considered as traffic-related compounds (e.g., benzene).
在芬兰的城市和居民区，对包括C2 - C10非甲烷烃、卤代烃和羰基化合物在内的71种挥发性有机化合物（VOCs）的环境空气浓度及来源贡献进行了研究。基于排放特征和浓度测量结果，使用化学质量平衡（CMB）受体模型估算了不同来源的贡献。结果表明，对于大量具有不同性质的不同化合物，应用CMB是可行的。然而，该模型对不同化合物的性能差异显著。根据CMB分析，城市站点这些VOCs的主要来源是交通和远距离源。在居民区，交通贡献较小，而远距离源、液体汽油和木材燃烧的贡献较高。然而，发现不同的化合物组或化合物具有完全不同的来源。还表明，一种生物源化合物异戊二烯也有显著的人为来源，并且在某些地点，木材燃烧可能是一些通常被认为与交通相关的VOCs（如苯）的重要来源。
