对于三价乙化物和兰坦化物分离的取物中的进展:下一步要去哪里?
Xiaofan Yang1, Lei Xu2, Dong Fang1,3
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China. xiaoc@zju.edu.cn.
概括
新型的类衍生提取剂可以在废核燃料中更好地从类酸 (An(III)) 和类酸 (Ln(III)) 进行化学分离. 本综述详细介绍了它们的发展和分类,以提高核再加工效率和安全.
科学领域:
- 核化学 核化学 核化学
- 材料科学 材料科学 材料科学
- 分离科学 分离科学
背景情况:
- 废核燃料 (SNF) 含有有价值的放射性核素,但具有放射性和热的风险.
- 三价乙化物 (An(III)) 和化物 (Ln(III)) 的相似化学特性使SNF再加工复杂化.
- 现有的分离方法往往效率低,需要多种代理.
研究的目的:
- 审查用于An (III) /Ln (III) 分离的类衍生提取剂的发展.
- 根据结构差异和协调模式对这些提取剂进行分类.
- 分析它们的提取性能,并指导未来核燃料再加工研究.
主要方法:
- 对用于An(III) 和Ln(III) 复合的类衍生提取剂的文献综述.
- 提取剂分为四类:协调,N,O混合协调,高度预先组织和非对称结构.
- 讨论设计原则,提取效率和分离性能.
主要成果:
- 有原子的类衍生提取剂显示出有效的An(III) 对Ln(III) 分离.
- 提取剂的四个不同的结构类别具有不同的分离能力.
- 详细分析了每个类别的优点和缺点.
结论:
- 在核再加工中,类衍生提取剂代表了选择性An (III) /Ln (III) 分离的有前途的方法.
- 结构设计对于优化提取和分离性能至关重要.
- 这一审查为开发先进的提取剂提供了一个框架,以实现更安全,更高效的核能利用.
相关概念视频
Extraction: Advanced Methods
433
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
433
Ion-Exchange Chromatography
399
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
399
Qualitative Analysis
22.1K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
22.1K


