The leather industry refers to material-intensive industries in which the cost of raw materials is about 70-80% of the cost of finished products, therefore, the rational use of raw materials through waste disposal is of particular importance. 40-50% of the area can be used, the rest is usually sent for burial or incineration. Both in the first and in the second case, this is not only economically inefficient, but also an environmentally hazardous way to get rid of these wastes. One of the ways to dispose of such waste (minnow and sawn trim) is to process them into hydrolysates and use them in the production of gelatin, adhesives and building materials. In this paper, the possibility of using collagen hydrolysates as a modifier of phenol-formaldehyde resins has been studied. The sorption of heavy metal ions by an oligomeric sorbent obtained by modifying phenol-formaldehyde resins with collagen hydrolysate was studied at various pH values, temperature, particle sizes, and metal ion concentrations. The physical and technical characteristics of the adsorbent are determined.