大气颗粒物中多环芳烃的源解析方法

Discussion on Methods of Source Apportionment of Polycyclic Aromatic Hydrocarbons on Airborne Particulate

综述了用于大气颗粒物中多环芳烃 (PAHs)源解析的主要定性、定量方法 ,并对其优缺点作了总结。比值法多用于定性解析 ,化学质量平衡法 (CMB)要求源的成分谱较全面 ,而多元统计法则要求输入的数据较多。由于缺乏各污染源较完整的PAHs成分谱 ,且PAHs易发生化学反应 ,所以CMB法难以广泛推广 ,而多元统计法对源成分谱要求低 ,且不需要考虑PAHs的降解 。

The main qualitative and quantitative methods for source apportionment of PAHs on airborne particulate are reviewed and evaluated in thisarticle. Ratio method is mainly applied in qualitative apportionment. Comprehensive source fingerprints are required for chemical mass balance method , while more data are required for multivariate statistical analysis method. Broad application of chemical mass balance method is hindered by the absence of a reliable combustion source fingerprints and the reactivity and instability of PAHs, while comprehensive source fingerprints aren't required and decay of PAHs can not be considered for multivariate statistical analysis method. Therefore multivariate statistical analysis method is of high value of application.