Morphological study of PM2.5 by SEM-EDS in Ulaanbaatar

Abstract

A morphological and elemental composition of PM2.5 in air pollution of Ulaanbaatar by Scanning Electron microscopy (SEM) combined X-ray Energy Dispersive Spectrometry (EDS) were investigated. The morphological parameters were measured using the 5k magnification picture of SEM and analyzed the 752 individual particles of the 25 days (winter-10, summer-15) sample of the PM2.5. The size distribution shown the ∼45% of particles were most harmful fraction of particulate matters for human health (less 0.4μm). These fraction particles increased up to 92% in winter. It was shown that ultrafine and irregular PM2.5 results from the combustion. The results of determining the elemental composition of these individual particles are presented.