大气颗粒物表面特征分析

运用扫描电镜和Ｘ射线能谱分析仪，分析太原市６个环境监测点７６３个颗粒物上元素成分和形态特征。结果显示Ａｌ、Ｓｉ、Ｃａ、Ｆｅ、Ｋ、Ｔｉ、Ｓ等常量元素在颗粒物表面含量丰富，检出频率高，而Ｃｒ、Ｎｉ、Ａｓ、Ｐｂ、Ｖ、Ｃｕ、Ｚｎ、Ｍｎ等微量元素在颗粒物表面含量少，检出频率低，但它们主要富集在小于２μｍ颗粒物表面，对人危害性大。结果还表明不同尘源颗粒物显示出不同元素含量及形态特证。

Analysis of Surface Characters of Airborne Particles

Elemental content and morphological features of 763 airborne particles were analyzed at monitoring sites in Taiyuan using Scanning Electron Microscopy with An Energy Dispersive X-Ray Spectremeter. The results indicated that constant elements Al, Si, Ca, Fe, K, Ti, S on the particulate surface were abundance and detection freqency for them was high.whereas trace elements Cr, Ni, As, Pb, V, Cu, Zn, Mn on their surfaces were a little and detection frequency was low. But they mainly were concentracted on the particles<2um so that their hazard to human health were increased. Particles from different sources showed different element compositions and morphological features.