STUDY OF THE ADSORPTION OF MANGANESE IONS (II) IN NATURAL KAOLINITE
The results of studies of sorption of manganese ions from aqueous solutions by kaolinite treated with NaCl solution. The structural formula of natural kaolinite.The calculated values for the maximum static adsorption capacity of kaolinite in relation to ions of manganese, which is 1,6 mmol/g. the Calculated distribution coefficients of manganese ions, the value of which decreases with increase in the concentration of the initial solution.Studied the balance of exchange of manganese ions on the kaolinite by the method of constructing the isotherms when the process temperature changes from 298 to 333 К. The description of the sorption process was carried out by the models Langmuir, Freundlich and Temkin. The calculations showed that the best data for the sorption described by Langmuir model. The nature of the interaction of manganese ions with kaolinite in salt form. The obtained values of the Gibbs energy have a negative sign –3,98 (298 K); –5,23 (313 K); –5,81 (333 K), which corresponds to a stable fixation on the surface of kaolinite.