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Abstract <p>Pharmacosiderite-type titanosilicates were prepared hydrothermally. The influence of the duration of hydrothermal synthesis on the cesium-137 and strontium-90 sorption properties of the titanosilicates, structural phase composition, surface morphology, and textural characteristics was investigated. The composition, morphology, and structure of the samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The textural characteristics of materials were studied by BET and EDX. The sorption properties of disubstituted pharmacosiderite-type titanosilicates toward cesium and strontium radionuclides in microconcentrations were studied in adsorption experiments from model solutions of liquid radioactive waste (LRW) with low and medium concentrations of interfering impurities.</p>

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Optimized Hydrothermal Synthesis of Pharmacosiderite-Type Titanosilicates for Extraction of 137Cs and 90Sr from High-Salinity Liquid Media

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • P. A. Marmaza,
  • N. P. Ivanov,
  • V. O. Kaptakov,
  • Ya. G. Zernov,
  • V. Yu. Maiorov,
  • A. N. Fedorets,
  • O. O. Shichalin,
  • E. K. Papynov

摘要

Abstract

Pharmacosiderite-type titanosilicates were prepared hydrothermally. The influence of the duration of hydrothermal synthesis on the cesium-137 and strontium-90 sorption properties of the titanosilicates, structural phase composition, surface morphology, and textural characteristics was investigated. The composition, morphology, and structure of the samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The textural characteristics of materials were studied by BET and EDX. The sorption properties of disubstituted pharmacosiderite-type titanosilicates toward cesium and strontium radionuclides in microconcentrations were studied in adsorption experiments from model solutions of liquid radioactive waste (LRW) with low and medium concentrations of interfering impurities.