Dust Source Identification Using Physical-Chemical Characterization in Birjand

City of Birjand, the capital of southern Khorasan province, is located as a dry and volcanic study area in eastern Iran, on the northeastern border of the Lut plain. Although it is not difficult in the area of gas contaminants, the microspheres more than ever caused unhealthy days Gets.The aim of this study was to investigate the physico-chemical properties, shape of the falling mineral dusts over Birjand and to identify their originsThe collected samples were as result of dry deposition process during summer and autumn in2016. This research was carried out on microscope particles larger than 10 μm. Using atomic absorption spectroscopy and X-ray fluorescence spectroscopy, soluble metals are detected in dust particles and cholera using an electron microscope of particle shape And the size is set.The volumes of dust in the city of Birjand peak at the end of summer. Calcium and potassium have the highest levels in the dust. Mineralogy examines them in their turning out. Dust contains a source in an alluvial and permafrost zone, and is very similar to the minerals found in the Sistan plain and the Hamoon wetlandThe physical and chemical analysis of the minerals present in the particles indicates the possible origin of the reindeer from the age of Sistan and from the 120-day-old winds. Calcium and potassium, with its highest content among the soluble metals, indicate the origin of the dusty debris.