Adsorption’s regularities of radionuclides on adsorbents from solutions

Abstract

The object of research: The object of research is the uranium isotopes were found in the soil of the locations of numerous thermal and cold springs in the Kalbajar region of Azerbaijan in the same proportions as in natural uranium deposits.
 Investigated problem: Uranium isotopes were transferred from soil samples to solutions. İnvestigated problem of scientific work is study of regularities of adsorption of uranium isotopes from solutions on the surfaces of various adsorbents.
 The main scientific results: It is defined high adsorption properties of DOWEX HCR granular elastomer, activated carbon and expanded clay on the result of researches. The activation’s energy of desorption of uranium isotopes from the surface of adsorbents were determined. Relatively low values (22.1–26.3 kJ/mol) of the activation’s energy of desorption of uranium isotopes from the surface of adsorbents indicate the absence of the chemical nature of sorption and the presence of only weak van der Waals forces between the absorbed isotopes and the surface of the adsorbents.
 The area of practical use of the research results: The regularities of adsorption of uran isotopes on adsorbent masses from aqueous solutions can be used as an original cleaning method of the drain water of the physical stage of crude oil refining or other radiochemical processes to the norms for waste water.
 Innovative technological product: It was determined based on the research, that the concentration of radon in the waters of most springs of the “Istisu” deposit is below the regulatory permissible value (60 Bq/l), which indicates the suitability of these spring waters for use in medical treatment procedures.
 Scope of the innovative technological product: It is planned to resume (prevented more than 40 years ago due to global regional problems) the production of the original trademark – “Istisu” medicinal water, with the concentration of radon below the standard value. Considering the two-fold decrease in radon concentration in water over four days, the waters of the individual sources examined, with a 100-fold high radon content, after a certain time (several months) can also be used for use in medical procedures, which allows their transportation to large distances