Zero-valent iron/siderite composites for high-efficiency Se(IV) capture from aqueous media: performance characterization and mechanism elucidation

IF 1.6 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2025-08-19 DOI:10.1007/s10967-025-10320-x

Yanjun Du, Qing Zhou, Jiankun Zhao, Hexi Wu, Xiaoyan Li, Yibao Liu, Zhanggao Le

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Abstract

⁷⁹Se is one of the key fission products in spent fuel, with a half—life of 6.5 × 10⁴ a. Due to its high mobility and minimal solubility constraints, it readily leaches into groundwater, causing extensive contamination and posing grave risks to ecosystems and human well-being. In this work, the removal of Se(IV) was studied by using FeCO₃ as the carrier. Zero-valent iron/siderite (Fe⁰/FeCO₃) composite materials were prepared by simple and economical ball milling method and liquid phase reduction method, and the removal of Se(IV) in aqueous solution was studied. The results showed that Fe⁰/FeCO₃ had unique advantages such as easy synthesis, large specific surface area and high adsorption capacity. It is expected to be used as a chemical barrier active material to block the migration of soluble variable nuclides represented by ⁷⁹Se, and to remove Se(IV) in geological disposal repositories of high-level radioactive waste.

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零价铁/菱铁矿复合材料在水介质中高效捕获硒（IV）：性能表征和机理阐明

79Se是乏燃料中的关键裂变产物之一，半衰期为6.5 × 104 a。由于其高迁移率和最小溶解度限制，它很容易渗入地下水，造成广泛的污染，对生态系统和人类健康构成严重威胁。本文研究了以FeCO3为载体对Se（IV）的去除。采用简单经济的球磨法和液相还原法制备了零价铁/菱铁矿（Fe0/FeCO3）复合材料，研究了其对水溶液中Se（IV）的去除效果。结果表明，Fe0/FeCO3具有合成简单、比表面积大、吸附能力高等独特优点。它有望作为一种化学屏障活性物质，阻止以79Se为代表的可溶性可变核素的迁移，并在高放射性废物地质处置库中去除Se（IV）。

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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.