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开发一种硫化零价铁地质聚合物复合物,用于减少ReO₄的固定

Chung-Seop Lee¹, Jinmo Ahn², Jaehyuk Kang³

¹Division of Environmental Science and Engineering (DESE), Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.

Journal of environmental management

|December 9, 2024

概括

具有硫化纳米级零价铁 (S-nZVI) 的地质聚合物复合物通过还原转换有效地固定 (ReO4-). 这种S-nZVI/GP复合物显著减少了放射性污染,提高了放射性废物管理应用.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
核工程核工程是指核工程.

背景情况:

地质聚合物废弃物形式为挥发性技术 (Tc) 提供低温固定.
阴性TcO4-在由于电荷排斥而导致的地聚合物保留方面存在挑战.
开发有效的TC固定方法对于核废物管理至关重要.

研究的目的:

开发一种地质聚合物复合物,用于降解性固定离子烯酸盐 (ReO4-),这是TcO4-.的替代品.
调查硫化纳米级零价铁 (S-nZVI) 对地质聚合物特性和 Re 固定化的影响.
从开发的S-nZVI/GP复合物中评估Re的可性.

主要方法:

一种含有不同量S-nZVI.VI的地质聚合物复合物的合成.
描述S-nZVI/GP复合材料的机械强度和S-nZVI分散.
在标准条件下进行的漏试验,以评估流动性.
分析地质聚合物矩阵内的再生特异和氧化状态.

主要成果:

在地聚合物矩阵中S-nZVI的均分散,添加率高达4.0%的重量%,保持机械强度 (>33.02 MPa).
与普通地质聚合物相比,S-nZVI/GP复合材料的漏率显著降低.
由于S-nZVI.所造成的还原环境,ReO4-转化为较低的氧化状态,包括ReS2.
Re 的可性从 1.04 × 10^-7 降低到 3.42 × 10^-11 cm2/s.

结论:

S-nZVI/GP复合材料显示了ReO4-.的增强的还原性固定.
添加S-nZVI有效地减轻了与地质聚合物废弃物形式中的离子物种相关的挑战.
这种S-nZVI/GP复合物显示出改善核工业放射性废物管理的巨大潜力.

关键词:

地质聚合物的地质聚合物.固定化固定化固定化放射性废物是一种放射性废物.这里是Technetium的技术.零价铁是没有价值的.

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