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Functionalized poly(glycidylmethacrylate) for selective uranium(vi) adsorption: experimental and theoretical
Ahmad A Tolba1, Ebrahium Abdel Gwad1, Marwa M Rashad1
1Nuclear Materials Authority P.O. Box 530, El-Maadi Cairo Egypt A_orabi_chem@yahoo.com.
RSC Advances
|February 4, 2026
Summary
A novel polyamine-phosphonic acid-functionalized polyglycidyl methacrylate (PPA-PGMA) adsorbent efficiently recovers uranium(VI) from acidic solutions. This durable adsorbent shows high selectivity and reusability, offering a promising solution for uranium extraction from ore leachates.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nuclear Chemistry
Background:
- Uranium recovery is crucial for nuclear energy and industry.
- Existing methods face challenges with efficiency, selectivity, and environmental impact.
- Development of advanced adsorbents is needed for effective uranium extraction.
Purpose of the Study:
- To synthesize and characterize a novel functionalized adsorbent, PPA-PGMA, for uranium(VI) recovery.
- To investigate the adsorption mechanism, kinetics, thermodynamics, and reusability of PPA-PGMA.
- To evaluate the adsorbent's performance in recovering uranium from real ore leachates.
Main Methods:
- Synthesis of PPA-PGMA adsorbent and structural characterization (CHNP, BET, SEM, TGA, XRD, XPS, FTIR).
- Batch adsorption experiments to determine optimal conditions (pH, time) and adsorption capacity.
- Kinetic, thermodynamic, and desorption studies; application to acidic ore leachates.
Main Results:
- PPA-PGMA exhibited a high saturation adsorption capacity of 0.828 mmol g-1 for U(VI) at pH 3.0-6.0.
- Adsorption followed pseudo-second-order kinetics and Langmuir isotherm, indicating a spontaneous, endothermic process.
- The adsorbent maintained 88-90% efficiency after six cycles and showed high selectivity for U(VI) in ore leachates.
Conclusions:
- PPA-PGMA is a highly effective, reusable, and selective adsorbent for uranium(VI) recovery.
- The developed 3D nonlinear mathematical model accurately describes the adsorption process.
- PPA-PGMA shows significant potential for practical application in uranium extraction from complex acidic matrices.
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