Efficient adsorption of Cs(I) and Sr(II) ions from solution by xanthate modified sponge-like chitosan

IF 2.1 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Engineering and Design Pub Date : 2025-06-01 Epub Date: 2025-04-02 DOI:10.1016/j.nucengdes.2025.114031

Bowen Xu , Tian Huiyu , Chen Jianbo , Wei Lifeng , Wang Kai , Jianlong Wang

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Abstract

Efficient removal of radionuclides from radioactive wastewater is vital for ensuring the sustainable development of nuclear energy. Herein, xanthate-modified sponge-like chitosan-based adsorbent (CTS-SX) was synthesized through a facile method, which exhibited excellent adsorption performance for Sr(II) and Cs(I). The maximum adsorption capacity of Sr(II) and Cs(I) reached 76.21 and 133.15 mg·g⁻¹ respectively. Various models were used to fit the adsorption process, and the results indicated that the adsorption process of Sr(II) was best fitted by Freundlich isotherm model and phenomenological internal mass transfer kinetic model, while the adsorption of Cs(I) was best fitted by Langmuir isotherm model and Langmuir kinetics model. In addition, the adsorption performance in binary-component system, influence of pH and competing ions were also explored. In summary, the modification could improve the amount of active sites and hydrophobility of CTS-SX. With excellent adsorption performance and simplicity of separation, CTS-SX has potential in application for radioactive wastewater treatment.

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黄原药改性海绵壳聚糖对溶液中Cs(I)和Sr（II）离子的高效吸附

有效去除放射性废水中的放射性核素对确保核能的可持续发展至关重要。本文通过简便的方法合成了黄药改性海绵状壳聚糖基吸附剂（CTS-SX），该吸附剂对Sr（II）和Cs(I)具有优异的吸附性能。对Sr（II）和Cs(I)的最大吸附量分别达到76.21和133.15 mg·g−1。采用多种模型拟合吸附过程，结果表明：Sr（II）的吸附过程最适合Freundlich等温线模型和现象学内传质动力学模型，Cs(I)的吸附过程最适合Langmuir等温线模型和Langmuir动力学模型。此外，还探讨了在二元体系中的吸附性能、pH和竞争离子对吸附性能的影响。综上所述，改性可以提高CTS-SX的活性位点数量和疏水性。CTS-SX具有良好的吸附性能和简单的分离性，在放射性废水处理中具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Engineering and Design 工程技术-核科学技术

CiteScore

3.40

自引率

11.80%

发文量

377

审稿时长

5 months

期刊介绍： Nuclear Engineering and Design covers the wide range of disciplines involved in the engineering, design, safety and construction of nuclear fission reactors. The Editors welcome papers both on applied and innovative aspects and developments in nuclear science and technology. Fundamentals of Reactor Design include: • Thermal-Hydraulics and Core Physics • Safety Analysis, Risk Assessment (PSA) • Structural and Mechanical Engineering • Materials Science • Fuel Behavior and Design • Structural Plant Design • Engineering of Reactor Components • Experiments Aspects beyond fundamentals of Reactor Design covered: • Accident Mitigation Measures • Reactor Control Systems • Licensing Issues • Safeguard Engineering • Economy of Plants • Reprocessing / Waste Disposal • Applications of Nuclear Energy • Maintenance • Decommissioning Papers on new reactor ideas and developments (Generation IV reactors) such as inherently safe modular HTRs, High Performance LWRs/HWRs and LMFBs/GFR will be considered; Actinide Burners, Accelerator Driven Systems, Energy Amplifiers and other special designs of power and research reactors and their applications are also encouraged.