Here, we suggest a facile and technologically available approach to synthesis of tungsten oxide-based materials implementing a liquid phase reductive precipitation followed by thermal dehydration of the obtained materials. Structure of the investigated sorbents refers to the type of tungsten bronze. Effects of annealing temperature on such properties as chemical and hydromechanical stability along with selective characteristics with respect to Sr-90 have been studied. Sorption investigations in static and dynamic regimes were done on micro- and macro-concentrations of strontium within 2–12 pH range in water solutions. Material’s selectivity to strontium has been assessed in the presence of such competing ions as Na+, K+, NH4+ and Ca2+. Respective constant values for Freundlich, Langmuir, and Langmuir–Freundlich equations have been evaluated for prepared samples. Full dynamic exchange capacity has been determined in dynamic sorption conditions.
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The work was partially supported by RFBR (project 19–33-90150) in terms of developing new methods of sorbents synthesis and their physicochemical characterization. Also, developing the methods of analytical determination of precise radionuclide quantities in the solutions after selective sorption and in the bulk of the sorption matrixes was partially supported within the frames of the State Order of the Institute of Chemistry FEBRAS (project no. 0265–2019-0002). The use of Shimadzu equipment in the work is financially supported by Genzo Shimadzu scholarship.
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Egorin, A.M., Dran’kov, A.N., Didenko, N.V. et al. Synthesis and sorption characteristics of tungsten oxides-based materials for Sr-90 removal from water media. J Mater Sci 55, 9374–9384 (2020). https://doi.org/10.1007/s10853-020-04683-7