Composite ion exchange resins were prepared by coating copper ferrocyanide and hydrous manganese oxide powders on polyurethane foam. The binder used was polyvinyl acetate in alcohol/acetone medium. Studies were conducted in pilot scale using 50 L ion exchange column and treated category III radioactive liquid wastes. About 2000 to 2400 bed volumes of liquid wastes containing radioactive ¹³⁷Cs and ⁹⁰Sr were treated. Digestion of the resins was carried out in a 25 L column using alkaline KMnO₄. The digested liquid was fixed in cement matrix and the matrices were characterized with respect to compressive strength, biological and leach resistance.