用于有效地从含有的水溶液中分离Mg2+的碳氧化素基吸附剂
Estefanía Oyarce1, Ling-Ping Xiao2, Run-Cang Sun2
1Department of Metallurgical Engineering, Faculty of Engineering, University of Santiago de Chile, Santiago, Chile.
International journal of biological macromolecules
|August 22, 2025
概括
这项研究开发了生物基吸收剂从碳化素 (LC) 和多烯酸盐 (PAS) 来有效地去除 (Mg2+). 新型LC增强材料显示改善了Mg2+吸附,即使在 (Li+) 的存在下也是如此.
科学领域:
- 材料科学
- 环境化学
- 聚合物科学
背景情况:
- 开发用于选择性离子去除的可持续吸附剂对于水处理至关重要.
- 价值化提供了一种创造环保材料的途径.
- 在水溶液中, (Mg2+) 和 (Li+) 的分离具有挑战性.
研究的目的:
- 使用碳化素 (LC) 和多烯酸盐 (PAS) 制备和描述新的生物吸附剂.
- 评估这些材料从水溶液中去除Mg2+的吸附能力和选择性,特别是在Li+的存在下.
- 阐明Mg2+对开发的吸附剂的吸附机制和动力学.
主要方法:
- 用多烯酸盐 (PAS) 进行氧化和随后的基聚聚合.
- 使用FT-IR,SEM,BET等热体,XPS和EDS分析进行表征.
- 批量吸附实验以评估Mg2+的去除效率,动力学和选择性在Li+的存在下.
主要成果:
- 通过FT-IR和定位 (11.7 mmol/g) 成功将碳酸盐组纳入素.
- 增加LC增加了60%的Mg2+吸附能力,并提高了Mg2+对Li的选择性 (αMg2+/ Li+=3. 78对于PAS-20%-LC).
- 吸附遵循PFO和Redlich Peterson模型,表明一种离子交换机制,并且在不同的离子强度下保持稳定.
结论:
- 碳酸基吸附剂 (PAS-LC) 有效地从含有Li的溶液中选择性地去除Mg2+.
- 增强的吸附性和选择性归因于LC和PAS的协同作用.
- 这些生物基材料为水处理中的双价离子分离提供了有希望的可持续解决方案.
相关概念视频
Extraction: Advanced Methods
528
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...
528
Qualitative Analysis
22.6K
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...
22.6K
Ion Exchange
658
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...
658
Capillary Electrophoresis: Applications
527
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
527
Ion-Exchange Chromatography
762
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...
762
Precipitation and Co-precipitation
2.0K
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...
2.0K


