Abstract
Extraction of uranyl, La(III), and Y(III) nitrates from aqueous solutions containing 0–4 M sodium nitrate with a composite solid extractant based on a polymeric support impregnated with trialkylmethylammonium nitrate (Aliquat-336) was studied. The extraction isotherms were analyzed assuming that uranyl, La(III), and Y(III) nitrates are extracted with the solid extractant in the form of complexes (R4N)2[Ln(NO3)5] and (R4N)2[UO2(NO3)4], respectively. The calculated extraction constants decrease in the order La3+ > UO 2+2 > Y3+. The joint extraction of uranyl, La(III), and Y(III) nitrates with the solid extractant from aqueous salt solutions was studied. The La/U separation factor increases with increasing total concentration of uranyl and La(III) nitrates in aqueous phase.
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Original Russian Text A.K. Pyartman, V.A. Keskinov, V.V. Lishchuk, A.V. Konstantinova, V.V. Belova. 2007, published in Radiokhimiya, 2007, Vol. 49, No. 3, pp. 237–240.
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Pyartman, A.K., Keskinov, V.A., Lishchuk, V.V. et al. Extraction of uranyl, La(III), and Y(III) nitrates with a composite solid extractant based on a polymeric support impregnated with trialkylmethylammonium nitrate. Radiochemistry 49, 268–272 (2007). https://doi.org/10.1134/S1066362207030101
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DOI: https://doi.org/10.1134/S1066362207030101