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Sustainable plutonium separation: Development and evaluation of polyethersulfone-tri-isoamyl phosphate composite beads.

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Title: Sustainable plutonium separation: Development and evaluation of polyethersulfone-tri-isoamyl phosphate composite beads.
Authors: Guchhait, Satya Ranjan1,2 (AUTHOR), Patra, Kankan1,2 (AUTHOR), Karak, A.1 (AUTHOR), Sengupta, Arijit2,3 (AUTHOR), Sathe, D.B.1 (AUTHOR), Bhatt, R.B.1 (AUTHOR), Singh, D.K.2,4 (AUTHOR) dksingh@barc.gov.in, Yadav, Kartikey K.2,4 (AUTHOR) yadavkk@barc.gov.in
Source: Separation Science & Technology. 2026, Vol. 61 Issue 3-5, p592-607. 16p.
Subjects: Polyethersulfone, Environmental remediation, Radioactive waste disposal, Phosphate esters, Acid solutions, Extraction techniques, Composite materials
Abstract: Novel composite beads were fabricated by incorporating tri-isoamyl phosphate (TiAP) into a polyethersulfone (PES) matrix. Advanced characterization techniques like scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) confirmed the successful integration of TiAP. These beads demonstrated significant potential for extracting tetravalent plutonium (Pu(IV)) from acidic solutions. Various factors influencing the extraction process were investigated, including acid type, acid concentration, actinide metal ion concentration, and ligand concentration. Nitric acid was identified as the most effective medium for extraction. The Kd value initially increased upto 3 M nitric acid concentration followed by a decrease. The sorption process was rapid (equilibrium established within 20 minutes), following pseudo-second-order kinetics. The maximum Pu(IV) loading capacity was determined to be 156.25 mg/g, suggesting monolayer chemisorption. Loaded Pu(IV) was efficiently stripped using sodium carbonate, and the beads demonstrated excellent reusability over multiple cycles. The study's findings highlight the potential of these TiAP-PES composite beads for the sustainable quick separation of Pu(IV) from aqueous acidic streams. This study offers a promising solution for nuclear waste management and environmental remediation efforts, contributing to a cleaner and safer future. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Novel composite beads were fabricated by incorporating tri-isoamyl phosphate (TiAP) into a polyethersulfone (PES) matrix. Advanced characterization techniques like scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) confirmed the successful integration of TiAP. These beads demonstrated significant potential for extracting tetravalent plutonium (Pu(IV)) from acidic solutions. Various factors influencing the extraction process were investigated, including acid type, acid concentration, actinide metal ion concentration, and ligand concentration. Nitric acid was identified as the most effective medium for extraction. The Kd value initially increased upto 3 M nitric acid concentration followed by a decrease. The sorption process was rapid (equilibrium established within 20 minutes), following pseudo-second-order kinetics. The maximum Pu(IV) loading capacity was determined to be 156.25 mg/g, suggesting monolayer chemisorption. Loaded Pu(IV) was efficiently stripped using sodium carbonate, and the beads demonstrated excellent reusability over multiple cycles. The study's findings highlight the potential of these TiAP-PES composite beads for the sustainable quick separation of Pu(IV) from aqueous acidic streams. This study offers a promising solution for nuclear waste management and environmental remediation efforts, contributing to a cleaner and safer future. [ABSTRACT FROM AUTHOR]
ISSN:01496395
DOI:10.1080/01496395.2025.2478428