Intergel system polymethacrylic acid hydrogel (gPMAA) and poly-2-methyl- 5-vinylpyridine hydrogel (gP2M5VP) behavior in aqueous medium and solution of 10-water lanthanum sulfate in dependence from time was studied. During sorption of La3+ ions electrochemical properties of solutions and volume-gravimetric properties of hydrogels change significantly. Under affect of mutual activation sorption capacity of initial hydrogels in intergel system increases.