Abstract
This contribution presents the composition of dust aerosol collected in dust storms in the territory of the weather station Ayvaj southern Tajikistan, during the years 2007-2015. High concentrations of the compounds SiO2 (54.23%), CaO (11.25%) and Al2O3 (10.16%) were found, which is characteristic for dust. The statistical characteristics of measured compounds is determined and the correlation coefficients between certain compounds are calculated. A significant high correlation is observed between SiO2 and Na2O (r=0.98), between Fe2O3 and SO3 (r=0.89), between Fe2O3 and Al2O3 as well as between K2O and MgO (r=0.89).
Highlights
Mineral dust plays an important role in the optical, physical and chemical processes in the atmosphere, while dust deposition adds exogenous mineral and organic material to terrestrial surfaces, having a significant impact on the Earth’s ecosystems and biogeochemical cycle [1-10].To study the content of chemical compounds in the dust aerosol during dust storms, an x-ray fluorescence wave dispersion spectrometer S8 TIGER by Bruker was used
X-ray radiation is generated by the tube and hits the sample, which in turn emits x-rays of a certain wavelength, which is the characteristic radiation that uniquely determines the element of the periodic system
The energy of the primary beam must be greater than the excitation energy of the characteristic radiation
Summary
To study the content of chemical compounds in the dust aerosol during dust storms, an x-ray fluorescence wave dispersion spectrometer S8 TIGER by Bruker was used. The samples are irradiated by an x-ray tube with energies up to 60 keV. In the case of liquid samples or unbound powders, measurements are carried out in a nitrogen or helium atmosphere.
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