磁性S-nZVI纳米颗粒的合成及其在海水中放射性铀的有效去除中的应用

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2024-09-25 DOI:10.1007/s10967-024-09786-y

Miao Lei, Jun Zhang, Chang Liu, Junpeng Guo, Ye Li

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引用次数: 0

摘要

本文合成S-nZVI去除海水中的U（VI）。在S/Fe = 0.18、pH = 5的条件下，对U（VI）的吸附在20 min后达到平衡，去除率为97.93%。Langmuir等温模型最大吸附量为1177.09 mg/g。此外，S-nZVI对干扰离子具有选择性，在5次重复使用中具有良好的再生性能，在实际海水中具有较高的去除率。机理研究表明，由于S2−、S22−和Fe（II）提供的电子，均匀吸附在S-nZVI表面的UO22+被不可逆还原并生成UO2沉淀。

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Synthesis of magnetic S-nZVI nanoparticle and its application for the effective removal of radioactive uranium from seawater

Herein, S-nZVI was synthesized to remove U(VI) from seawater. At a S/Fe ratio of 0.18 and pH of 5, adsorption of U(VI) reached equilibrium after 20 min with the removal rate of 97.93%. And the maximum adsorption capacity obtained by Langmuir isothermal model was 1177.09 mg/g. Moreover, S-nZVI exhibited selectivity in the presence of interfering ions, regeneration performance in 5 reuse cycles, and high removal efficiency in actual seawater. Mechanism investigations showed that UO₂²⁺ uniformly adsorbed on S-nZVI surface was irreversibly reduced and generated UO₂ precipitates due to the electrons provided by S²⁻, S₂²⁻ and Fe(II).

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.