Two novel extraction chromatography resins containing multiple diglycolamide-functionalized ligands: preparations, characterization and actinide uptake properties

S.A. Ansari, P.K. Mohapatra, M. Iqbal, Jurriaan Huskens, Willem Verboom

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14 Citations (Scopus)

Abstract

Two extraction chromatography resins were prepared for the first time by impregnating multiple diglycolamide-functionalized ligands such as diglycolamide-calix[4]arene (C4DGA) and tripodal diglycolamide (T-DGA) on Chromosorb-W, an inert solid support, for the removal of hazardous actinides like Am(III) from radioactive waste solutions at 3 M nitric acid. The resins were characterized by SEM, thermal and surface area (BET) analyses. The sorption of Am(III) on the two resins followed pseudo-second order sorption rate kinetics and was exothermic in nature. The sorption of trivalent f-elements proceeded through a chemisorption monolayer phenomenon as analyzed by using several isotherm models. The negative free energy change (ΔG) values of −34.46 and −28.45 kJ/mol for T-DGA and C4DGA, respectively, indicate a chemical interaction between the metal ions and the ligands on the surface of the resins. Distribution coefficient measurements of various metal ions showed a selective sorption of trivalent f-elements over hexavalent uranyl ions and other fission product elements. Column studies on breakthrough indicated 0.76 and 0.37 mg/g as the breakthrough capacities of the T-DGA and the C4DGA resins, respectively. It was possible to quantitatively elute the loaded metal ion using EDTA solutions
Original languageUndefined
Pages (from-to)79-86
Number of pages8
JournalJournal of chromatography A
Volume1334
DOIs
Publication statusPublished - 2014

Keywords

  • IR-95100
  • METIS-308508

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