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Extraction: Advanced Methods

Extraction: Advanced Methods

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...

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Updated: Aug 14, 2025

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

Published on: June 21, 2015

Bis-Catecholamide-Based Materials for Uranium Extraction.

Guillaume Mossand¹, Evan Lelong¹, Chen Xing¹

¹ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, 30207, Bagnols sur Cèze Cedex, France.

|January 13, 2023

Summary

This summary is machine-generated.

New chelating resins effectively extract uranium(VI) from seawater. These formo-phenolic resins demonstrate high capacity and selectivity, even in challenging saline conditions.

Keywords:

catecholamides chelation resins sorbent polymers uranium extraction

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Methods for Analyzing the Impacts of Natural Uranium on In Vitro Osteoclastogenesis

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Published on: January 30, 2018

Area of Science:

Materials Science
Environmental Chemistry
Nuclear Chemistry

Background:

Seawater contains uranium(VI) but extraction is challenging due to high pH and excess cations.
Developing selective adsorbents for uranium recovery from marine environments is crucial.

Purpose of the Study:

To synthesize novel formo-phenolic resins with catecholamide (CAM) moieties.
To evaluate the resins' efficacy in selectively extracting uranium(VI) from simulated and natural seawater.

Main Methods:

Synthesis of formo-phenolic resins incorporating phenol, catechol, or resorcinol with CAM moieties.
Sorption experiments to assess uranium(VI) uptake capacity and selectivity under saline conditions.
Adsorption studies using Langmuir and pseudo-second-order models to determine thermodynamic and kinetic parameters.

Main Results:

The synthesized resins exhibit significant sorption properties for uranium(VI).
The most effective resins achieved an uptake capacity of approximately 50 mg/g.
High selectivity for uranium was observed, even in the presence of competing ions in saline water.

Conclusions:

Formo-phenolic resins functionalized with CAM moieties are promising materials for uranium(VI) recovery from seawater.
The resins show excellent performance under challenging marine conditions.
Further investigation into adsorption kinetics and thermodynamics supports their application in uranium extraction.