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Phosphoryl-Graphene for High-Efficiency Uranium Separation and Recycling.

Martin Pykal¹, Veronika Šedajová¹, Aditya Thakur²

¹Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc 779 00, Czech Republic.

ACS Applied Materials & Interfaces

|February 20, 2025

Summary

Researchers developed phosphoryl-functionalized graphene (PG) for efficient uranium extraction from water. This sustainable method rapidly removes uranyl ions, offering a promising solution for nuclear waste management and environmental protection.

Keywords:

graphene derivatives molecular dynamics simulations phosphoryl-functionalized graphene two-dimensional (2D) materials uranium adsorption

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Area of Science:

Materials Science
Environmental Chemistry
Nuclear Engineering

Background:

Nuclear energy sustainability requires efficient uranium extraction for waste management.
Environmental protection necessitates effective removal of uranium from water sources.

Purpose of the Study:

To design and synthesize a novel material for efficient uranyl ion adsorption.
To evaluate the performance of the developed material for uranium extraction from aqueous solutions and seawater.

Main Methods:

Synthesis of phosphoryl-functionalized graphene (PG) from fluorinated graphene via solvothermal conditions.
Uranium adsorption experiments in aqueous media and seawater.
Characterization using X-ray photoelectron spectroscopy (XPS) and molecular dynamics (MD) simulations.

Main Results:

PG exhibited high sorption efficiency (∼77%) and rapid extraction (∼5 min) for U(VI) at pH 7.
Achieved a high adsorption capacity of 316 mg U g^-1 and significant seawater adsorption capacity of 117.8 mg U g^-1.
Demonstrated good recyclability and stability over 3 cycles, with preferential binding to phosphoryl groups.

Conclusions:

Phosphoryl-functionalized graphene is a highly effective adsorbent for uranium extraction.
The developed material shows potential for sustainable nuclear energy and environmental remediation.
This approach can be extended to recover other radioactive elements from water resources.