从LnIII/AnIII中提取和选择性分离ZrIV,使用未稀释的离子液体
Alok Rout1, Nagarajan Ramanathan1,2
1Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India.
ChemPlusChem
|November 10, 2023
概括
这项研究表明,使用基离子液有效地用溶剂提取 (IV),从而从兰化物 (Ln(III)) 和活性化物 (An(III)) 进行选择性分离. 离子液体对Zr (IV) 的负载能力很高,对Eu (III) /Am (III) 的共同提取最小.
科学领域:
- 放射化学 放射化学是指辐射化学.
- 分离科学 分离科学
- 材料化学 材料化学
背景情况:
- 在核燃料再加工和废物管理中,金属离子的选择性分离至关重要.
- 离子液为溶剂提取提供独特的特性,但它们用于特定的分离需要详细的研究.
- (IV) 与类 (Ln(III)) 和动类 (An(III)) 的分离,在金学中是一个重大挑战.
研究的目的:
- 为了研究使用未稀释的基离子液提取 (IV) 的溶剂.
- 为了实现Zr(IV) 与代表性Ln(III) (Eu(III)) 和An(III) (Am(III)) 的选择性分离.
- 探索实验参数对Zr(IV) 提取的影响,并了解复合机制.
主要方法:
- 使用tri(hexyl) tetradecylphosphonium酸盐 ([P66614][NO3]) 作为离子液相的溶剂提取实验.
- 酸度的系统变化,初始金属料度和平衡时间.
- 负载实验以确定金属吸收能力.
- 研究热力学和剥离效率.
主要成果:
- 在没有外部连接体的情况下实现了Zr(IV) 的有效提取,而Eu(III) 和Am(III) 的共同提取是可以忽略不计的.
- 获得了Zr (IV) 与Eu (III) /Am (III) 的高分离系数.
- 离子液体 ([P66614][NO3]) 显示了对Zr的显著负载能力.
- 与其他相比,酸盐离子被确定为金属负荷的优越离子.
结论:
- 研究的基于的离子液对于选择性地将Zr{IV}从Ln{III}和An{III}分离起来是非常有效的.
- 这些发现支持这种离子液体系统在先进的核燃料循环过程中的潜在应用.
- 对热力学和剥离行为的进一步研究为工艺设计提供了基础.
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