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相关概念视频

Ion Exchange01:17

Ion Exchange

1.1K
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...
1.1K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

1.1K
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...
1.1K

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相关实验视频

Updated: Jan 12, 2026

An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
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通过氨基聚合物添加剂工程提高纳米过膜选择性,以从盐水中有效提取.

Shaofan Duan1,2, Shuai Jiang1,2, Ping Xu1

  • 1Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodaicho, Nada, Kobe, 657-8501, Japan.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 30, 2025
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概括

这项研究引入了一种新的方法,用于增强使用改性纳米过 (NF) 膜从盐水中提取的方法. 改进的膜显示出对的选择性优于的选择性,这对于有效的直接提取 (DLE) 至关重要.

关键词:
氨基聚合物添加剂工程 氨基聚合物添加剂工程接口聚合物化的介面.提取的提取方法纳米过膜是一种纳米过膜.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 环境科学 环境科学

背景情况:

  • 使用纳米过 (NF) 膜的直接提取 (DLE) 是蒸发的可持续替代方案.
  • 传统的聚胺 (PA) NF膜由于表面电荷和透性-选择性权衡,具有较差的/选择性.

研究的目的:

  • 开发一种可扩展的方法,以提高NF膜中的分离性能.
  • 为了提高Li+/Mg2+的选择性,以便从盐水中有效丰富.

主要方法:

  • 在界面聚合过程中将聚胺 (PAA) 纳入聚胺 (PA) 膜.
  • 膜性质的表征,包括水的透性和离子排斥.
  • 用模拟盐水在两阶段的NF过程中测试优化膜.

主要成果:

  • 用PAA添加剂合成的优化PA膜显示水透率为12.1 L m-2 h-1 bar-1.
  • 化 (MgCl2) 排斥显著增加,从18.8%增加到94.7%.
  • 使用优化膜的两阶段NF过程成功地从模拟盐水中净化了.

结论:

  • 经PAA修饰的PA膜提供了增强的Li+/Mg2+选择性和高水透度.
  • 该战略为DLE应用中高效丰富和净化提供了一个有前途的方法.
  • 开发的膜显示了从盐水中可持续回收的工业应用潜力.