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Hydrothermal synthesis, structure and sorption performance to cesium and strontium ions of nanostructured magnetic zeolite composites

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초록

The problem of water contamination by long-living cesium and strontium radionuclides is an urgentenvironmental issue. The development of facile and efficient technologies based on nanostructuredadsorbents is a perspective for selective radionuclides removal. In this regard, current work aimed toobtain the nanostructured magnetic zeolite composites with high adsorption performance to cesium andstrontium ions. The optimal conditions of hydrothermal synthesis were established based on XRD, SEMEDX, N2 adsorption-desorption, VSM, and batch adsorption experiment data. The role of chemicalcomposition, textural characteristics, and surface morphology was demonstrated. The monolayer ionexchange mechanism was proposed based on adsorption isotherm modeling. The highest Langmuiradsorption capacity of 229.6 and 105.1 mg/g towards cesium and strontium ions was reached forcomposite obtained at 90 C hydrothermal treatment. It was shown that magnetic characteristics ofzeolite composites allowing to separate spent adsorbents by a magnet from aqueous solutions

Abstract

The problem of water contamination by long-living cesium and strontium radionuclides is an urgentenvironmental issue. The development of facile and efficient technologies based on nanostructuredadsorbents is a perspective for selective radionuclides removal. In this regard, current work aimed toobtain the nanostructured magnetic zeolite composites with high adsorption performance to cesium andstrontium ions. The optimal conditions of hydrothermal synthesis were established based on XRD, SEMEDX, N2 adsorption-desorption, VSM, and batch adsorption experiment data. The role of chemicalcomposition, textural characteristics, and surface morphology was demonstrated. The monolayer ionexchange mechanism was proposed based on adsorption isotherm modeling. The highest Langmuiradsorption capacity of 229.6 and 105.1 mg/g towards cesium and strontium ions was reached forcomposite obtained at 90 C hydrothermal treatment. It was shown that magnetic characteristics ofzeolite composites allowing to separate spent adsorbents by a magnet from aqueous solutions

참고문헌 (54)

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