Observational study demonstrates high molybdenum uptake in activated carbon composites, implying potential for radioisotope applications.
Activated carbon (AC) derived from rice husks was synthesized via chemical activation and functionalized with manganese ferrite (MnF) nanocomposites through a one-step hydrothermal method to obtain MnF/AC. Molybdenum-99 (99Mo) was produced at the Dalat Nuclear Research Reactor (Vietnam) via neutron irradiation. The synthesized materials were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, vibrating-sample magnetometry (VSM), nitrogen (N2) adsorption/desorption isotherms, and energy-dispersive X-ray spectroscopy (EDX) with elemental mapping. Batch adsorption studies revealed a high 99Mo(VI) uptake capacity of 333.23 mg·g⁻¹ (Langmuir model), outperforming values reported in the literature. Adsorption followed pseudo-second-order kinetics, and thermodynamic parameters (ΔG°, ΔH°, ΔS°) confirmed a spontaneous process between 298–323 K. A 99Mo/99mTc (Technetium) generator was then successfully assembled using the MnF/AC-packed column. Elution with 5 mL of 0.9% NaCl at room temperature produced Na99mTcO₄ with radiochemical purity near 100% and radionuclidic purity exceeding 99.6%, suitable for nuclear medicine applications.
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Thanh et al. (2025) studied this question.
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