使用激活离子交换机从水溶液中增强离子吸附
Talkybek Jumadilov1,2, Khuangul Khimersen1,3, Józef Haponiuk4
1Bekturov Institute of Chemical Sciences, 106 Sh. Ualikhanov Str., Almaty 050010, Kazakhstan.
Polymers
|January 23, 2024
概括
一个新型的聚合物系统, Lewatit CNP LF@AV-17-8,显著提高了离子回收. 这种材料显示出从酸盐溶液中回收稀土元素 (REE) 的优异吸附效率.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 无机化学 无机化学 有机化学
背景情况:
- 对稀土元素 (REE) 的需求不断增长,需要有效的回收方法.
- 离子交换树脂对于分离和净化REE至关重要.
- 开发用于增强REE吸收的先进材料至关重要.
研究的目的:
- 为了研究新型聚合物系统的吸附效率, Lewatit CNP LF@AV-17-8 (X: Y),对于 (Lu3+) 离子.
- 评估聚合物间系统不同质量比的性能.
- 评估该系统在稀土元素回收方面的潜力.
主要方法:
- 在不同的质量比下合成"Lewatit CNP LF@AV-17-8" (X:Y) 聚合物系统.
- 使用酸盐溶液中的离子进行吸附实验.
- 分析技术包括重力测量,UV-VIS光谱和ICP-OES用于量化.
- 使用弗洛伊德利希等热法进行吸附建模.
主要成果:
- 介聚物系统"Lewatit CNP LF@AV-17-8" (4:2) 与单个组件 (25%和21%) 相比,显著提高了Lu3+吸附率 (42%).
- 该系统证明符合弗洛伊德利希吸附模型,表明有效的吸附特性.
- 通过优化的聚合物系统,获得了221.05mg/g的吸附能力.
结论:
- "莱瓦蒂特CNP LF@AV-17-8" (4:2) 聚合物系统是离子的高效吸收剂.
- 这种新材料提供了一种有前途的方法,可以提高从水溶液中提取稀土元素的回收率.
- 这些发现支持开发用于提取关键元素的先进离子交换材料.
更多相关视频
相关概念视频
01:17Ion Exchange
592
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
592
01:09Ion-Exchange Chromatography
523
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...
523
00:56Extraction: Advanced Methods
447
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...
447
02:51Metal-Ligand Bonds
20.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.8K
01:19Complexation Equilibria: The Chelate Effect
518
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
518
00:43Complexometric Titration: Ligands
954
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
954