运用X射线能谱分析方法研究城市污染物在琼花花粉内的富集

X-ray EDS analysis on the city pollution enriched in Viburnum macrocephalum Fort.f.keteleeri pollen

应用环境扫描电子显微镜和X射线能谱仪对比分析了扬州市区、瘦西湖景区及扬州大学校区琼花花粉12种元素相对含量,结果表明:(1)市区生长的琼花花粉中某些元素的含量大大高于瘦西湖景区,其中铅的含量为瘦西湖琼花中含量的127%、汞的含量为115%、硫的含量为120%,其他元素的含量相差无几,但铜的含量明显低于瘦西湖,为82%,钾为85%;(2)扬州大学校区琼花花粉的元素含量与瘦西湖相似,硫的含量相对较高,为114%,铅和铜的含量略高于瘦西湖景区,分别为103%和101%,钾和钙的含量则高于瘦西湖景区的含量,分别为114%和128%。实验结果表明,这种植物通过X射线能谱分析可以做城市污染的标志植物。

Relative content of 12 kinds of elements in Viburnum macrocephalum Fort. f. keteleeripollen in Yangzhou city, Slim West Lake and Yangzhou university were analyzed with ESEM and X-ray EDS. The results showed that： （1） The content of some elements in Yangzhou city was higher than that in Slim West Lake, among which the content of Pb, Hg and S was 127%, 115% and 120% respectively. However, the content of some elements in Yangzhou city was relatively lower than that in Slim West Lake, such as Cu and K with the value of 82% and K 85 %. The content of the other elements showed little difference between the sites investigated. （2） In Yangzhou university the content of some elements was similar to that in Slim West Lake while the content of S, Pb, Cu, K and Ca were relatively higher with their value of 114%, 103%, 101%, 114%, 128% respectively. The results presented here indicate that this plant species can be used as a model plant to determinate the city pollution using X-ray EDS analysis.