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In the paper, investigation results of the uptake efficiency of radionuclides 60 Co, 90 Sr, and 137 Cs dissolved in water onto iron oxides α-Fe 2 O 3 and Fe 3 O 4 are presented. It was found that sorption efficiency increased for higher pH values. Independent of the oxide nature, the uptake characteristics are the best toward 60 Co and the worst toward 137 Cs, forming the row as follows: 60 Co &gt; 90 Sr &gt; 137 Cs. The highest sorption ability at pH 9 was found for magnetite Fe 3 O 4 , which was 93%, 73%, and 26% toward 60 Co, 90 Sr, and 137 Cs, respectively, while the respective percentages for hematite α-Fe 2 O 3 were 85%, 41%, and 18%. It was assumed that the main sorption mechanism was ion exchange. That may explain some decrease of the sorption efficiency in drinking water due to the interfering presence of magnesium and calcium cations. The obtained results indicated the feasibility of the tested sorbents and their merits, especially in terms of relatively high uptake coefficients, low costs, availability, and lack of toxicity.

Uptake of Radionuclides 60Co, 137Cs, and 90Sr with α-Fe2O3 and Fe3O4 Particles from Aqueous Environment