Abstract
The ability of calcium and magnesium phosphates of different compositions to selectively take up ions of stable strontium and of 85Sr radionuclide from calcium-containing solutions (0.05 M CaCl2), including those containing complexones (EDTA, HEDP), was studied. In the presence of 0.05 M CaCl2, the sorption capacity of calcium phosphates for strontium ions decreases by a factor of 8–10. Magnesium phosphates and magnesium-containing sorbents prepared from natural dolomite preserve up to 90% of the sorption capacity (80–100 mg g–1) in the presence of CaCl2 and complexones, compared to salt-free aqueous solutions, and the 85Sr distribution coefficient against the background of 0.05 M CaCl2 is (1.1–1.3) × 102 cm3 g–1. The mechanism of different behavior of calcium and magnesium phosphate sorbents toward strontium ions was suggested, and the effect of HEDP and EDTA on the strontium uptake by these sorbents was revealed.
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Original Russian Text © A.I. Ivanets, I.L. Shashkova, N.V. Kitikova, A.V. Radkevich, Yu.P. Davydov, 2015, published in Radiokhimiya, 2015, Vol. 57, No. 6, pp. 521–525.
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Ivanets, A.I., Shashkova, I.L., Kitikova, N.V. et al. Recovery of strontium ions with calcium and magnesium phosphates from aqueous solutions against the background of CaCl2 . Radiochemistry 57, 610–615 (2015). https://doi.org/10.1134/S1066362215060089
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DOI: https://doi.org/10.1134/S1066362215060089