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Selective removal of Am(III) and Pu(IV) from analytical waste solutions of quality control operations using extractant encapsulated polymeric beads

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Present study reports simultaneous batch and column extraction of Pu(IV) and Am(III) followed by selective stripping from actual analytical waste solution generated during quality control operations. N, N, N′, N′ tetra(2-ethylhexyl) diglycolamide (TEHDGA), di(2-ethylhexyl) phosphoric acid (DEHPA), individually and their combination, encapsulated in polyether sulphone resin beads have been investigated. TEHDGA + DEHPA encapsulated resin showed better performance with respect to kinetics (2 h) and extent of extraction (KD ~ 8000 at 5 M nitric acid) for both Am(III) and Pu(IV). Interesting presence of DEHPA, inefficient as extractant at high nitric acid molarity, improved polymer extraction characteristics. Extraction selectivity over assorted metal ions and reusability for three cycles of operations was established.

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Authors express their sincere gratitude to Shri M. K. Saxena, Head, RACD and Dr. Neetika Rawat, Head, IICS for their persistent support during the course of this work. Authors also thank Dr. Sangita Dhara Lenka for the TXRF analysis results.

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Correspondence to Ankita Rao.

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Kumar, S.S., Rao, A., Yadav, K.K. et al. Selective removal of Am(III) and Pu(IV) from analytical waste solutions of quality control operations using extractant encapsulated polymeric beads. J Radioanal Nucl Chem (2020). https://doi.org/10.1007/s10967-020-07045-4

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  • Polyether sulphone resin
  • Plutonium
  • Americium
  • Nitric acid
  • N, N, N′, N′ tetra (2-ethylhexyl) diglycolamide (TEHDGA)
  • di(2-ethylhexyl) phosphoric acid (DEHPA)