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在ZrO₂上解开Np(V) 吸附:一种批量,光谱和建模的综合方法

Isabelle Jessat¹, Harald Foerstendorf¹, André Rossberg²

¹Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.

Journal of hazardous materials

|September 24, 2023

概括

研究了海 (Np(V)) 与 (ZrO2) 的相互作用,以确定放射性废物的安全性. 结果显示,Np(V) 在ZrO2上形成内部球面复合体,这对于库存评估至关重要.

科学领域:

环境科学环境科学
放射化学放射化学是指辐射化学.
材料科学材料科学材料科学

背景情况:

长寿命的活性化物,如海王星,是放射性废物安全评估的关键.
了解海王星与 (ZrO2) 等腐蚀产品的相互作用对于存储库完整性至关重要.

研究的目的:

在没有碳酸盐的 (ZrO2) 上研究子 (V) 吸附.
在宏观和分子层面描述Np(V) -ZrO2相互作用.
开发一个预测模型,用于核废弃物储存库中海王星的行为.

主要方法:

宏观吸附研究 (离子强度,同电点).
在分子层面的表征使用在位减弱总反射里埃变换红外光谱学 (ATR-FTIR).
扩展的X射线吸收细结构 (EXAFS) 谱学以确定复杂化结构.

主要成果:

在ZrO2上,NPV的吸收独立于离子强度,这表明内部球体复杂化.
吸附等温体显示出不同的强和弱结合点.
埃克萨弗斯证实了在弱吸附位点的双边内球复合体形成.

结论:

Np(V) 在ZrO2上形成内部球面复合体,具体的结构细节得到阐明.
一个CD-MUSIC模型进行了参数化,改善了NPV环境命运的预测.
结果支持对放射性废物存储库和废燃料存储的安全评估.

关键词:

埃克萨斯税收 (EXAFS) 是一个关税系统.海王星 (((V) 是一个元素.表面复杂化建模的模型.吸收时间吸收时间的是的元素之一.

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