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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

1.8K
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...
1.8K
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...
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Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

4.0K
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...
4.0K
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

1.1K
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,...
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
Precipitation of Ions03:11

Precipitation of Ions

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Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
29.8K

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Related Experiment Video

Updated: Jan 10, 2026

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand
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Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand

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Efficient cation separation based on humidity control and adsorption.

Jinjiang Liang1, Xin Chen1, Changming Li2

  • 1State Key Laboratory of Quantum Functional Materials, School of Physical Science and Technology, Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai, 201210, China.

Nature Communications
|November 26, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel polyacrylonitrile-chitosan composite for selective ion sieving. The material offers high-capacity lithium extraction with excellent adsorption rates and environmental friendliness.

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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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Last Updated: Jan 10, 2026

Sulfate Separation by Selective Crystallization with a Bis-iminoguanidinium Ligand
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Published on: September 8, 2016

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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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Area of Science:

  • Materials Science
  • Environmental Science
  • Chemical Engineering

Background:

  • Precise ion sieving is critical for energy and environmental applications.
  • Current methods suffer from poor selectivity, high costs, and environmental concerns.

Purpose of the Study:

  • To develop a selective, cost-effective, and environmentally friendly ion sorbent.
  • To achieve high-capacity adsorption of alkali and alkaline earth metal salts.

Main Methods:

  • Fabrication of polyacrylonitrile-chitosan composite spheres.
  • Utilizing distinct deliquescent humidity ranges for selective adsorption.
  • Controlled humidity levels for targeted ion separation.

Main Results:

  • Achieved a lithium adsorption capacity of 133.60 mg/g, surpassing existing methods.
  • Demonstrated a rapid adsorption rate of 83.64 mg/g/h.
  • Exhibited high selectivity, recovery rates, and environmental friendliness.

Conclusions:

  • The developed composite sorbent offers a superior solution for selective ion extraction.
  • This method presents a cost-efficient, low-energy, and eco-friendly alternative for lithium recovery.