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Abstract <p>Synthesis of a nanostructured magnetic aluminosilicate sorbent for the efficient removal of <sup>90</sup>Sr from aqueous media has been investigated. The inorganic sorbent was obtained by co-precipitation followed by hydrothermal treatment to give a composite with nanoparticles of magnetic phase based on Fe<sub>3</sub>O<sub>4</sub> (5–10 nm) uniformly distributed in an amorphous aluminosilicate matrix (in 1 : 3 ratio). Structural studies confirmed mesoporous morphology (specific surface area is 40 m<sup>2</sup>/g) and thermal stability up to 1000°C. The sorption material displays superparamagnetic properties (18 emu/g), which enable its efficient magnetic separation from purified solution. The maximal capacity toward stable Sr<sup>2+</sup> ions is 105 mg/g (Langmuir model), with high distribution coefficients for radionuclides <i>K</i><sub>d</sub> (<sup>90</sup>Sr) = 2273–2368 mL/g even in the presence of competitive Ca<sup>2+</sup> ions (100 mg/L). The sorption material is promising for the purification of liquid radioactive wastes.</p>

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Nanostructured Magnetic Aluminosilicate for Strontium Radionuclide Sorption from Aqueous Media

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • E. K. Papynov,
  • O. O. Shichalin,
  • N. P. Ivanov,
  • A. P. Zavyalov,
  • T. L. Simonenko,
  • O. V. Kapatkov,
  • A. A. Belov,
  • S. B. Yarusova,
  • V. Yu. Mayorov,
  • Z. E. Priimak,
  • A. V. Ognev,
  • I. G. Tananaev

摘要

Abstract

Synthesis of a nanostructured magnetic aluminosilicate sorbent for the efficient removal of 90Sr from aqueous media has been investigated. The inorganic sorbent was obtained by co-precipitation followed by hydrothermal treatment to give a composite with nanoparticles of magnetic phase based on Fe3O4 (5–10 nm) uniformly distributed in an amorphous aluminosilicate matrix (in 1 : 3 ratio). Structural studies confirmed mesoporous morphology (specific surface area is 40 m2/g) and thermal stability up to 1000°C. The sorption material displays superparamagnetic properties (18 emu/g), which enable its efficient magnetic separation from purified solution. The maximal capacity toward stable Sr2+ ions is 105 mg/g (Langmuir model), with high distribution coefficients for radionuclides Kd (90Sr) = 2273–2368 mL/g even in the presence of competitive Ca2+ ions (100 mg/L). The sorption material is promising for the purification of liquid radioactive wastes.