兰州市大气总悬浮颗粒物中有机污染物分布特征及来源

对兰州市区、郊区大气颗粒物、汽车尾气及烟尘样品中的饱和烃和芳香烃进行了色谱－质谱检测，较为系统地对兰州市大气有机污染物来源做了定量、半定量研究。结果表明，兰州市大气有机污染物主要来源于人为因素，小部分为自然因素。人为污染源是复杂（包括工业生产、汽车尾气和燃煤等的排放）且严重的，应引起足够重视。

The Distribution Characteristics and Origins of Organic Pollutants in the Atmospheric Aerosols in Lanzhou City

In this work, samples such as airborn particulates, exhaust gas and smogdust were collected during heating and non heating seasons in the urban and suburban areas of Lanzhou. After extract and separation, saturated hydrocarbon and aromatic hydrocarbon were analyzed by GC MS. Based on the analytical results from quantitative and semi quantitative analysis and the characteristics of mono molecular carbon isotope composition in n alkanes, the origin of the organic pollutants was studied. The results from the study show that the organic pollutants over Lanzhou city are mainly from human activities (i.e. automobiles and coal burning). And the pollution from coal burning is the major source of the organic pollution in winter.