Exploration of sorption properties of Greek zeolites for Cs- and U-removal from aqueous solutions

IF 1.8 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Applied Radiation and Isotopes Pub Date : 2025-06-10 DOI:10.1016/j.apradiso.2025.111995

Filippos Karantoumanis, Panagiotis Tsamos, Fotini Noli

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Abstract

In this study sorption properties of Greek zeolites with significant cation exchange capacity were investigated for the removal of Cs and U from aqueous solutions. The sorption experiments were undertaken at room temperature in the concentration range 25–1000 mg/L using zeolites of different origin and grain size under various conditions (pH, ion and metal concentration, competitive ions). The pH_pzc and CEC were determined, and sorption isotherms were reproduced through mathematical models. The characterization of the materials before and after sorption was performed by XRD, FTIR, SEM-EDS, while leaching and desorption tests were also performed. The results showed that the sorption capacities were affected by chemical composition and grain size and were enhanced with increasing CEC and Si/Al ratio. The significant sorption capacities obtained (48.1–106.4 mg g⁻¹ for cesium and 37.8–190.1 mg g⁻¹ for uranium) demonstrate that these materials are low-cost efficient sorbents and promising candidates in environmental technology for nuclear waste management.

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希腊沸石对水溶液中铯和铀的吸附性能研究

研究了具有显著阳离子交换能力的希腊沸石对Cs和U的吸附性能。采用不同来源和粒径的沸石，在不同的pH、离子和金属浓度、竞争离子条件下，在25 ~ 1000 mg/L的室温条件下进行吸附实验。测定了pHpzc和CEC，并通过数学模型再现了吸附等温线。采用XRD、FTIR、SEM-EDS对吸附前后的材料进行了表征，并进行了浸出和脱附实验。结果表明，吸附能力受化学成分和晶粒尺寸的影响，并随着CEC和Si/Al比的增加而增强。所获得的显著吸附能力（铯为48.1-106.4 mg g - 1，铀为37.8-190.1 mg g - 1）表明，这些材料是低成本高效的吸附剂，是核废料管理环境技术的有希望的候选材料。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.