Highly Efficient Extraction Chromatography Resin Containing Hexa-n-Octyl Nitrilotriacetamide (HONTA) for Selective Recovery of Plutonium from Acidic Feeds

Rajesh B. Gujar, Seraj A. Ansari, Prasanta K. Mohapatra*, Richard J.M. Egberink, Jurriaan Huskens, Willem Verboom*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
49 Downloads (Pure)

Abstract

An extraction chromatography resin was prepared by impregnating hexa-n-octyl nitrilotriacetamide (HONTA) on chromosorb-W. This resin shows very efficient performance for selective separation of Pu4+ over other actinides like uranium and americium. The distribution coefficient for Pu4+ (at 3 M HNO3) was on the order of 104 mL/g, with separation factors of >103 for other actinides. The extraction kinetics for Pu4+ was slow and took 20 min of shaking for reaching the equilibrium conditions and followed both the film diffusion and the intraparticle diffusion kinetic models. The Pu4+ sorption on the resin followed the Langmuir monolayer model with a sorption energy of 11.2 kJ/mol. The maximum Pu4+ loading capacity on the resin was 58.2 mg/g resin, which corresponds to 1:1 Pu/ligand complex formation. Excellent column performance was observed for selective separation of Pu4+ from a mixture of Pu, Am, and U in a 3 M HNO3 solution.

Original languageEnglish
Pages (from-to)5954-5961
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume62
Issue number14
Early online date31 Mar 2023
DOIs
Publication statusPublished - 12 Apr 2023

Keywords

  • 2023 OA procedure

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