Abstract
The development of new materials and technologies for effective treatment of liquid radioactive waste is an urgent task. In present work, the novel Ti-Ca-Mg phosphate sorbents were developed. Sorbents were characterized by X-ray diffraction (XRD), Fourier transmittance infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and N2 adsorption-desorption techniques. The influence of the chemical composition of mixed Ca-Mg-Ti phosphate sorbents and solution pH and the nature of the radionuclide on the sorption efficiency of 137Cs, 85Sr, and 60Co radionuclides were determined. The obtained materials demonstrated excellent affinity towards 137Cs, 85Sr, and 60Co radionuclides (Kd reached up to 105 mL g−1). For all Ti-Ca-Mg phosphates, an increase in the sorption efficiency of 137Cs with an increase in the titanium content was observed. It was shown that the samples of Ti-Ca-Mg phosphates containing of 33–60 wt% titanium effectively removed 137Cs, 90Sr, and 60Co radionuclides at pH 8.0–11.0. The prepared Ti-Ca-Mg phosphate sorbents are promising for one-stage treatment of aqueous solutions of complex composition from 137Cs, 85Sr, and 60Co radionuclides and could be used for development of advanced technology for liquid radioactive waste treatment.
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This work was financially supported by the Belarusian Republican Foundation for Fundamental Research (grant #X18P-026) and the Russian Foundation for Fundamental Research Bel-a according to the research project N18-53-00003.
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Ivanets, A., Kitikova, N., Shashkova, I. et al. One-Stage Adsorption Treatment of Liquid Radioactive Wastes with Complex Radionuclide Composition. Water Air Soil Pollut 231, 144 (2020). https://doi.org/10.1007/s11270-020-04529-7
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DOI: https://doi.org/10.1007/s11270-020-04529-7