The adsorption of Cu(II) and Ag(I) ions on microgranules formed by drying in supercritical conditions was investigated. Sorption isotherms were described by the Langmuir, Langmuir-Freundlich, Redlich-Peterson, Dubinin-Radushkevich, modified Dubinin-Radushkevich and Toth equations. Sorption capacity of Cu(II) lies in the range from 2.6 to 2.3 mmol/g(chitosan) and that of Ag(I) is 2.2 mmol/g(chitosan), Adsorption process can be interpreted in terms of the theory of volumetric filling of micropores, and the adsorption surface has a heterogeneous character.