Sorption of Sr-90 and Cs-137 on silica and iron, manganese, titanium, and aluminum hydroxides

Sorption of Sr-90 and Cs-137 from solutions with pH close to that of natura l water (4-9) on iron, manganese, titanium, and aluminum hydroxides and sil ica of various crystallinity was studied. The field experiments showed that the amount of radioactive isotopes accumulated in iron hydroxides is 5-10 times greater as compared with the background. Amorphous hydroxides and nat ural bauxite exhibit high sorption capacity for Sr-90, whereas Cs-137 is ac tively sorbed by manganese hydroxides. Certain recommendations on the use o f these compounds are made.