二盐作为有效的提取剂,用于从酸介质中分离 (VI)
Anna Yu Fominykh1, Mikhail A Gerasimov1,2, Tatiana Poliakova1
1Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1 Bld. 3, Moscow 119991, Russia. fominyhanna@bk.ru.
Dalton transactions (Cambridge, England : 2003)
|December 8, 2025
概括
新的二盐有效地从酸中提取. 双电荷联结体和优化的左边长度增强了的提取和选择性,优于传统的盐.
科学领域:
- 无机化学 无机化学
- 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:
- 的开采对于核燃料再加工和废物管理至关重要.
- 传统的盐是有效的,但可以改进以提高效率和选择性.
- 开发新型提取剂是推进分离技术的关键.
研究的目的:
- 引入一类新的二盐作为高效的取剂.
- 研究连接体结构 (阳离子和连接体长度) 对提取效率和选择性的影响.
- 阐明在提取过程中的复合机制.
主要方法:
- 合成和描述具有不同离子和连接长度的新型二盐.
- 液体-液体提取实验,以评估 (VI) 和化物分离.
- 光谱技术 (拉曼,XANES) 和单晶X射线衍射以确定提取物种的结构.
主要成果:
- 与单离子盐相比,二盐的取效率明显更高.
- 提取效率可以通过离子选择和链接器长度进行调整,双电荷连接体显示出优异的性能.
- 观察到对的高选择性(VI) 超过兰坦化物,受链条长度的影响.
- 结构分析证实了在特定条件下形成离子酸盐复合物,UO2 ((NO3) 3-和UO2 ((NO3) 42-,以及罕见的混合化酸盐物种.
结论:
- 二盐代表了一种有前途的新类提取剂,用于高效和选择性的回收.
- 连接体设计,特别是连接器长度和电荷,在优化提取性能方面发挥着至关重要的作用.
- 了解提取的物种的协调化学,为设计下一代分离剂提供了洞察力.
相关概念视频
00:56Extraction: Advanced Methods
1.0K
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...
1.0K
03:46Qualitative Analysis
23.6K
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...
23.6K
03:11Precipitation of Ions
29.8K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
29.8K
01:09Ion-Exchange Chromatography
1.8K
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...
1.8K
01:17Precipitation and Co-precipitation
4.0K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.0K
00:49Gravimetry: Inorganic And Organic Precipitating Agents
5.6K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
5.6K