混合模式碳/弱离子交换吸附剂的表征,用于分离高醇基物质
Aghogho A Olomukoro1,2,3, Ruichao Xie4, Fabiola X Fernandez Paucar1,2
1Department of Chemistry and Biochemistry, The University of Toledo, Toledo, Ohio, USA.
Journal of separation science
|August 28, 2024
概括
新的吸附剂材料有效地从水中去除持久的和多基物质 (PFAS). 一种新的化树脂,Sepra-WAX-KelF-PEI,在PFAS修复方面表现出优越的吸附能力.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 和多醇基物质 (PFAS) 是全球关注的持续性环境污染物.
- 需要有效的补救策略来解决水溶液中的PFAS污染问题.
- 使用多种相互作用机制的吸附剂材料为PFAS清除提供了有前途的解决方案.
研究的目的:
- 开发和评估一种用于增强PFAS吸附的新型化树脂.
- 研究开发的吸附剂的吸附机制和吸附能力.
- 评估环境因素对PFAS吸收的影响.
主要方法:
- 修改聚乙烯-双乙烯聚合物以产生化树脂 (Sepra-WAX-KelF-PEI).
- 对Sepra-WAX,Sepra-WAX-KelF和Sepra-WAX-KelF-PEI对各种PFAS的吸附能力的评估.
- 研究pH值,离子强度和有机溶剂对PFAS吸附的影响.
主要成果:
- 新型Sepra-WAX-KelF-PEI树脂在测试的吸附剂中显示出最高的平均吸附能力 (523 mg/g).
- 与Sepra-WAX (353 mg/g) 和Sepra-WAX-KelF (220 mg/g) 相比,Sepra-WAX-KelF-PEI显示出更高的性能.
- 结合的静电和疏水/性相互作用是高PFAS吸附的关键.
结论:
- 开发的Sepra-WAX-KelF-PEI树脂是用于PFAS修复的高效吸附剂.
- 多种相互作用机制的结合显著提高了吸附能力和选择性.
- 这种新材料具有从水中去除PFAS的实际应用的潜力.
更多相关视频
12:05Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
Published on: October 10, 2013
15.5K
07:45Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
9.9K
相关概念视频
Ion Exchange
565
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...
565
Supercritical Fluid Chromatography
219
Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
SFC utilizes a supercritical fluid mobile phase,...
219
Ion-Exchange Chromatography
400
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...
400
Size-Exclusion Chromatography
527
In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
Silica particles offer advantages such as rigidity,...
527
Analyte Adsorption and Distribution
616
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
616
Silica Gel Column Chromatography: Overview
1.1K
Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
1.1K
