title: Multi-podant diglycolamides and room temperature ionic liquid impregnated resins: An excellent combination for extraction chromatography of actinides.
abstract: Extraction chromatography resins, prepared by impregnating two multi-podant diglycolamide ligands, viz. diglycolamide-functionalized calix[4]arene (C4DGA) and tripodal diglycolamide (T-DGA) dissolved in the room temperature ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide (RTIL: C4mimTf2N) on Chromosorb-W (an inert solid support), gave excellent results for the removal of trivalent actinides from acidic waste solutions. Distribution coefficient measurements on several metal ions showed selective sorption of Am(III) over hexavalent uranyl ions and other fission product elements such as strontium and cesium. The sorbed metal ions could be efficiently desorbed with a complexing solution containing guanidine carbonate and EDTA buffer. The sorption of Am(III) on both resins followed pseudo-second order rate kinetics with rate constants of 1.37×10(-6) and 6.88×10(-7)g/cpmmin for T-DGA and C4DGA resins, respectively. The metal sorption on both resins indicated the Langmuir monolayer chemisorption phenomenon with Eu(III) sorption capacities of 4.83±0.21 and 0.52±0.05mg per g of T-DGA and C4DGA resins, respectively. The results of column studies show that these resins are of interest for a possible application for the recovery of hazardous trivalent actinides from dilute aqueous solutions.
authors.affiliation: Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
authors.forename: R B
authors.initials: RB
authors.lastname: Gujar
authors.affiliation: Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
authors.forename: S A
authors.initials: SA
authors.lastname: Ansari
authors.affiliation: Laboratory of Molecular Nanofabrication, MESA(+) Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: W
authors.initials: W
authors.lastname: Verboom
authors.affiliation: Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India. Electronic address: mpatra@barc.gov.in.
authors.forename: P K
authors.initials: PK
authors.lastname: Mohapatra
mesh_terms: D000576:Americium / Q000302:isolation & purification*; D047250:Calixarenes / Q000737:chemistry*; D002412:Cations; D002586:Cesium / Q000302:isolation & purification; D002614:Chelating Agents / Q000737:chemistry; D002853:Chromatography, Liquid; D006016:Glycolates / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D007700:Kinetics; D008024:Ligands; D012996:Solutions; D013324:Strontium / Q000302:isolation & purification; D013696:Temperature; D014501:Uranium / Q000302:isolation & purification
chemical_list: D002412:Cations; D002614:Chelating Agents; D006016:Glycolates; D052578:Ionic Liquids; D008024:Ligands; D012996:Solutions; D047250:Calixarenes; D002586:Cesium; D014501:Uranium; D000576:Americium; D013324:Strontium
keywords: Actinides; Diglycolamide; Extraction chromatography; Separation