Abstract
Clay minerals modified with polyethylenimines (Mn-t-PEI) show promise for sorption treatment of wastewaters to remove U(VI) and for U(VI) preconcentration in determination of its low concentrations. Conditions are found for preparing modified sorbents: The optimal pH range for PEI sorption to prepare the modified sorbents is ≥9.0, which suggests electrostatic interaction of PEI with montmorillonite. The maximal sorption of the linear and branched polymers on montmorillonite, calculated from the sorption isotherms, is 0.32–0.38 g PEI/g mineral. The U(VI) sorption value on natural montmorillonite is considerably lower than on Mn-t-PEI, where the isotherm at low U(VI) concentrations is practically linear and the degree of U(VI) sorption exceeds 97% (depending on the uranium content).
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Original Russian Text © G.N. Pshinko, L.N. Puzyrnaya, A.A. Kosorukov, V.V. Goncharuk, 2010, published in Radiokhimiya, 2010, Vol. 52, No. 3, pp. 247–253.
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Pshinko, G.N., Puzyrnaya, L.N., Kosorukov, A.A. et al. Montmorillonite modified with polyethylenimines as a sorbent for recovering U(VI) from wastewaters. Radiochemistry 52, 291–298 (2010). https://doi.org/10.1134/S1066362210030124
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DOI: https://doi.org/10.1134/S1066362210030124