Study of the Influence Exerted by Microscopic Additives of Fullerenes on the Absorbing Capacity of Cation-Exchange Resins for d-Elements in Aqueous Media

Abstract

Introduction of fullerenes on the surface of KU-23 and KU-2-8 cation-exchange materials in amount of 0.001–0.005 wt % results in that the sorption capacity for copper cations becomes 1.2–1.6 times higher, and that for lead cations, 1.3–2.0 times higher. Ku-23 modified with fullerenes is characterized by a decrease in absorption capacity for Fe³⁺ cations by a factor of 1.3–2.0. Modification with fullerenes of ion-exchange materials leads to an increase by (10–12)% in the number of strong acid groups for all the materials under study and to a 1.2 times increase in the number of weak acid groups for KU-2-8. A mechanism is suggested for the sorption of metal cations on the fullerene-modified ion-exchange materials.