Removal of RE3+, Cs+, Sr2+, Ba2+ from molten salt electrolyte by precipitation and solidification of glass-ceramics

A phosphate glass‐ceramic wasteform incorporating cerium monazite was synthesized through a two‐step solid phase sintering methodology, aimed at immobilizing waste salts derived from the pyrochemical reprocessing of spent nuclear fuel. The initial phase involved the synthesis of cerium monazite powder, employing a stoichiometric mixture of CeF3 and NH4H2PO4 in a molar ratio of mol(Ce:PO4) = 1:1.4, which was subjected to a thermal treatment at 900°C. Subsequently, the glass‐ceramic matrix was fabricated by sintering a composite mixture of the synthesized cerium monazite and iron phosphate glass (IPG) powder at a temperature of 1000°C for a duration of 2 h, resulting in a cerium incorporation exceeding 36.5 wt%. Microstructural analysis and structural characterization of the glass‐ceramic sample elucidated the presence of monazite crystallites (CePO4) with dimensions ranging from .2 to 5.5 µm. The chemical durability of the wasteform was assessed through modified ASTM C1308 tests conducted in deionized water over a period of 28 days, revealing a total elemental leaching rate of 2.58 × 10−7 g m−2 min−1.

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Green NiFe₂O₄ nano-sorbent construction via Foeniculum vulgare extract for efficient barium ions removal

Elamin

El-Fattah

Modwi

2023

Zeitschrift Für Naturforschung A

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Ba ions were successfully adsorbed using green NiFe2O4-NPs that were generated using Foeniculum vulgare seeds extract. To investigate the structural and textural characteristics of the adsorbent powder, X-ray diffraction (XRD), nitrogen adsorption–desorption isotherm, X-ray photoelectron spectroscopy (XPS), Fourier transformer infrared (FTIR), and scanning/transmission electron microscopy (SEM) examinations were conducted. The FTIR and EDX investigations revealed the formation of NiFe2O4-NPs as indicated by the elemental composition and the bonding patterns. Some remarkable properties, including the growth of crystallite size and lattice parameters, were reached due to the extract addition, as revealed further by XRD examination. The sorption results were consistent with the Langmuir isotherm model, and the kinetic data were in accordance with pseudo-second-order kinetics. As a result of the electrostatic interaction between the negatively charged NiFe2O4-NPs surface and the positively charged Ba (II) ions, the adsorption process improved significantly above pHzc. The NiFe2O4 nanostructures with high competence for Ba2+ adsorption could be nominated to abolish additional harmful metal cations.

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Removal of RE3+, Cs+, Sr2+, Ba2+ from molten salt electrolyte by precipitation and solidification of glass-ceramics

Cited by 3 publications

References 41 publications

Additive manufacturing of hierarchical Zeolite-A lattices with exceptionally high Cs+ adsorption capacity and near-unity immobilization efficiency

Additive manufacturing of hierarchical Zeolite-A lattices with exceptionally high Cs+ adsorption capacity and near-unity immobilization efficiency

Synthesis and characterization of cerium monazite phosphate glass‐ceramic for immobilization of nuclear waste salt

Green NiFe₂O₄ nano-sorbent construction via Foeniculum vulgare extract for efficient barium ions removal

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Removal of RE3+, Cs+, Sr2+, Ba2+ from molten salt electrolyte by precipitation and solidification of glass-ceramics

Cited by 3 publications

References 41 publications

Additive manufacturing of hierarchical Zeolite-A lattices with exceptionally high Cs+ adsorption capacity and near-unity immobilization efficiency

Additive manufacturing of hierarchical Zeolite-A lattices with exceptionally high Cs+ adsorption capacity and near-unity immobilization efficiency

Synthesis and characterization of cerium monazite phosphate glass‐ceramic for immobilization of nuclear waste salt

Green NiFe2O4 nano-sorbent construction via Foeniculum vulgare extract for efficient barium ions removal

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Product

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Green NiFe₂O₄ nano-sorbent construction via Foeniculum vulgare extract for efficient barium ions removal