分子洞察二离子与单离子离子液体的分子洞察力,作为一种高疏水性替代品,用于从水中分离
Congfei Yao1, Haisong Wu2, Xiaoyu Li2
1Institute of Bismuth and Rhenium Science, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Environmental research
|February 5, 2024
概括
与单离子离子液体 (MILs) 相比,二离子离子液体 (DILs) 在废水中清除方面表现出优越的疏水性和效率. 这项研究强调了DILs作为废水处理的有效剂,具有良好的可重复使用性.
科学领域:
- 环境化学环境化学
- 绿色化学 绿色化学
- 材料科学 材料科学 材料科学
背景情况:
- 废水中的污染对环境和健康构成重大风险.
- 疏水提取剂对于有效的废水处理至关重要.
- 滴定离子液体 (DILs) 被研究为可能更水的替代物,而不是单定离子离子液体 (MILs).
研究的目的:
- 为了比较评估DIL和MIL在从水溶液中提取的效率.
- 阐明DIL和MIL的提取性能背后的分子机制.
- 优化使用DILs去除的实验参数,并评估其可重复使用性.
主要方法:
- 使用DILs和MILs去除的实验提取研究.
- 理论计算 (显微镜检查) 了解疏水性和分子间力.
- 优化参数,包括ILs与水的比率,时间,温度,pH值和初始醇度.
- 通过旋转蒸发来评估DIL的回收和再利用.
主要成果:
- 与MIL (93.7%) 相比,DIL显示了的提取效率更高 (高达97.4%).
- 理论分析证实,由于与水的结合较弱,DILs具有更高的疏水性.
- DILs和之间的更强的范德瓦尔斯力有助于提高它们的提取能力.
- 实现了优化条件和成功的DIL恢复和重复使用.
结论:
- DILs代表了一类高效且可重复使用的提取剂,用于污染废水处理.
- 获得的分子洞察力为设计先进的,特定任务的离子液体提供了基础.
- 这项研究为工业废水整治提供了一个有希望的绿色化学方法.
相关概念视频
Physical Properties of Alcohols and Phenols
14.4K
Alcohols are organic compounds in which a hydroxy group is attached to a saturated carbon. Phenols are a class of alcohols containing a hydroxy group attached to an aromatic ring. The physical properties of the alcohols and phenols are influenced by hydrogen bonding due to the oxygen–hydrogen dipole in the hydroxy functional group and dispersion forces between alkyl or aryl regions of alcohol and phenol molecules.
Alcohols possess a higher boiling point than aliphatic hydrocarbons of...
Alcohols possess a higher boiling point than aliphatic hydrocarbons of...
14.4K
Aqueous Solutions and Heats of Hydration
14.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.7K
Intermolecular Forces
58.3K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
58.3K
Acidity and Basicity of Alcohols and Phenols
19.1K
Like water, alcohols are weak acids and bases. This is attributed to the polarization of the O–H bond making the hydrogen partially positive. Moreover, the electron pairs on the oxygen atom of alcohol make it both basic and nucleophilic. Protonation of an alcohol converts hydroxide, a poor leaving group, into water—a good one. The two acid–base equilibria corresponding to ethanol are depicted below.
19.1K
Ion-Exchange Chromatography
496
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...
496
Ion 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


