LITHIUM EXCRETING ON SORBENTS TOKEM-160 AND AMBERLITE IR-120FROM AQUEOUS SOLUTIONS
At present, the Kamchatka geothermal deposits do not industrially extract lithium from natural solutions. The relevance of the research lies in the study of the sorption method for lithium extraction from the spent geothermal coolant. Lithium is one of the strategic metals for industry. Natural heat carrier contains rare and scattered elements, which can be obtained by sorption purification. The integrated use of geothermal resources is a promising direction in development of geothermal energy in the Kamchatka Territory. Obtaining valuable components will increase the productivity of the use of thermal energy of the Earth's bowels.The aim of the research is to establish the parameters of the sorption of industrial organic sorbents (TOKEM-160 and AMBERLITE IR-120)in relation to lithium ions under dynamic conditions.Method. Investigations were carried out under static conditions from model and working solutions, with constant stirring. Sorption in the dynamic mode was carried out at room temperature using a model solution. The lithium ion content was determined by high performance liquid chromatography on a Shimadzu chromatograph. Results. Sorption rate constants were determined. Based on experimental studies of lithium extraction from model solutions, the general laws of sorption, the protective action coefficients and the height of the working layer for industrial cation exchangers TOKEM-160 andAMBERLITE IR-120, as well as the dynamic adsorption capacity of the sorbents are established. The authors developed the recommendations on the use of cation exchange resins for the integrated processing of waste coolant. The paper introduces the microcomponent composition of samples of heat carriers of the Kamchatka Territory before and after sorption.