Composite materials based on layered and channel manganese oxides are widely used as adsorbents, molecular sieves and ion exchangers for the removal of toxic metal ions from aqueous solutions. The present work is devoted to the synthesis of nanoscale oxides of manganese with developed porous structure obtained by the sol-gel method, and the study of their selective sorption properties towards Sr (II) ions. Non-template sol-gel synthesis was carried out using manganese dioxide hydrosols which were obtained by the reduction of potassium permanganate by hydrogen peroxide, and manganese chloride (II). Obtained sols were characterized by containing MnO2 0,05 wt. %, pH 10,8, ζ-potential of -21.9 mV, and the content of MnO2 0,02 wt. %, pH 4,4, ζ-potential of -17.5 mV, respectively.Using scanning electron microscopy and adsorption-structural and X-ray analysis, it is studied the influence of the parameters of the porous structure, phase composition (Table) and morphology (Figure) on the sorption-selective properties of nanoscale oxides of manganese ions relative to Sr (II).Physico-chemical and selective adsorption properties of manganesetableThe data of table it is established that the process of sorption of Sr (II) on the synthesized samples is highly selective (degree of sorption (S) of the aqueous solution is 71-100%, of the solution with NaCl and CaCl2 - 17-99% and 7-47 %, respectively) due to a combination of a certain type of crystal structure and developed porous structure.