中国四城市空气中粗细颗粒物元素组成特征

The composing characteristics of elements in coarse and fine particle in air of the four cities in China

采集280多个来自中国4城市粗细颗粒物样品，用X一荧光光谱法分析了其中的42种元素报道了空气颗粒物中元素的组成特征，并对元素进行聚类分析，结果表明，主要可分成地壳元素及燃煤或燃油污染元素两大类污染点颗粒物中污染元素的浓度比对照点的要高，而且。

More than 280 coarse and fine particle samples were collected from the four cities in Chin4 and 42 kinds ofelement were analyzed by XRF. This paper shows the results of the composing characteristics of elements and the clusteranalysis shows that these elements could be classified into two kinds-the earth elementS and the coal or oil burning elements. The pollution elements in particle of pollution sites are relatively more concentrated than those of reference sites,andthe enrichment factors of the polluted elements from fossil fuel in fine particle are many bines larger than that in coarseparticle. However, the difference of enrichment factors between these two sites in same city is not as sighficant as thatamong cities.