鉴于大气重金属降尘对城市居民健康存在一定的威胁， 针对哈尔滨市从未开展过重金属沉降特征研究的现状， 采用被动采样技术共收集大气降尘样品46份， 用AFS-230E原子荧光光度计和ICP-AES全谱直读电感耦合等离子发射光谱法测量样品中的重金属元素含量， 计算各元素年沉降通量， 利用Pearson系数法、 主成分分析法、 富集因子法进行重金属沉降特征和来源分析。 结果表明， Mn和Co元素主要来自于自然源， 其余各元素沉降主要由人为源构成， 且人为源中占主导地位的是燃煤尘、 汽车尘和金属冶金尘。

In order to understand the characteristics of atmospheric heavy metal deposition in Harbin City, 46 deposition samples were collected which were taken using bulk deposition samplers during the period of 2008—2009 (about 365 days). The samples were analyzed for heavy metal concentration by atomic fluorescence spectrometry (AFS) and inductively coupled plasma-atomic spectrometry (ICP-AES). The deposition flux was calculated. Sources analysis was made by the method of principal component analysis (PCA), Pearsons and enrichment factor (EF). The following points can be gained through multivariate analysis. Mn and Co are mostly from natural sources while the others may be brought by coal dust, vehicle emissions and metal smelting.