The results of the research of the adsorption capacity of a number of sorbents of natural and synthetic origin for ammonium ions have been clustered. The natural zeolite of the Sokyrnytsia deposit, a synthetic sorbent based on the fly ash of Dobrotvir state district heat power plant, Al2O3, SiO2, as well as some types of soil: sandy soil, black soil, and clay were used in the research. Equations describing the regularities of adsorption processes depending on the type of sorbent were obtained. According to the obtained dendrograms, two main clusters of sorbents were identified. The statistical parameters of the process and the significance of the obtained results were calculated. The coefficient of determination of the experimental data was 0.67 - 0.99, the standard deviation was 0.017 - 0.026.
 Arkhipova H., Mudrak O., Zavertana D.: Visnyk NAU., 2010, 1.
 Gomonay V., Golub N., Gomonay P.: Book of Proceedings of the International Regional Seminar “Environment Protection: Modern Studies in Ecology and Microbiology” 1997, 2.
 Han, R., Zou L., Zhao X., Xua Ya., Xua F., Lia, Y., Wanga, Yu . :Chem. Engineering J.., 2009, 149. https://doi.org/10.1016/j.cej.2008.10.015
 Kuliyeva, T. Z., Lebedeva N. N., Orbuh V. I., Sultanov Ch. A.: Fizika., 2009, 3.
 Nethaji S., Sivasamy A., Mandal A.: Int. J. Environ. Sci. Technol., 2013, 10, 231.
 Matłok M., Petrus R., Warchoł J.: Ind. Eng. Chem. Res., 2015, 54, 6975.
 Sabadash V., Hyvlyud A., Gumnitsky Ya.: Chem. Chem. Technol., 2016, 2.
. Hyvlyud A., Sabadash V., Gumnitsky Ya., Ripak N. Chem. Chem. Technol., 2019, 2, 95.
 Lur'e Yu.Yu.: Spravochnyk po analytycheskoy khymyy. Moskva, 1989.
 Spravochnіk khymyka. 1971, 2.
 Petrukhyn O.M.: Praktykum po fyzyko-khymycheskym metodam analyza. Khymyya, Moskva, 1987.