In summary, the adsorption and physicotechnical properties of geopolymer slag-alkaline SMD materials make it possible to recommend them for radiation-shielding barriers, immobilization and storage of liquid and solid radioactive wastes, instead of the currently used technology employing ion-exchange resins and high-grade aluminate portland cement. REFERENCES , I. Yu. Shishchits and P. P. Polu6ktov, "Basic qualities of engineering barriers for storage of radioactive wastes in geological formations," At. l~nerg., 69, No. 4, 263-264 (1990). 2. A. S. Krivokhatskii, "Problems of radioactive wastes," Priroda, No. 5, 50-59 (1989). 3. F. Passant, "Symposium on burial of low and medium-level wastes," Atomnaya Tekhnika za rubezhom, No. 5, 36- 38 (1989). 4. V. M. Tarasov and M. N. Syrkus, "Basic approaches to solving problems of reprocessing and storing radioactive wastes," l~nergeticheskoe stroitel'stvo za rubezhom, No. 6, 7-18 (1989). 5. I. F. Vovk, "Scientific principles of storing radioactive wastes in geological formations. Review of research," Preprint IGFM, Academy of Sciences of the Ukrainian SSR, Kiev (1990) 6. A. P. Zosin, T. I. Priimak, L. B. Koshkina, and T. F. Martynova, Adsorption-Active Materials for Industrial Ecology [in Russian], Apatity (1991). 7. A. P. Zosin, Complex Reprocessing of Wastes from the Copper-Nickel Industry into Building and Technical Materi- als [in Russian], Apatity (1988). 8. A. P. Zosin, T. I. Primak, V. P. Lebedev, and I. S. Ivanov, "Method for obtaining sorbent, ~ Inventor's Certificate NO. 833308 USSR, MKI 3 B 01J 39/08, D 02 F 1/28. No. 2786278/23-26, declaration date June 29, 1979, published May 30, 1981. ....