Unique Eu(III) transport selectivity seen using a supported liquid membrane containing a diglycolamide dendrimer ligand

Bholanath Mahanty, Prasanta K. Mohapatra*, Andrea Leoncini, Jurriaan Huskens, Willem Verboom*

*Corresponding author for this work

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Dendrimers are exotic multi-functional ligands and are expected to give rise to better extraction/transport results as compared to the mono-functional ligands. Diglycolamide (DGA) based dendrimers are scarcely reported and literature on their transport studies are very limited. Transport of Am(III) and Eu(III) across a PTFE (polytetrafluoroethylene) based flat sheet supported liquid membrane containing a generation 1 dendrimer of tris(2-aminoethyl)amine (TREN), containing six diglycolamide (DGA) pendent arms (termed as TREN-G1-DenDGA) was investigated from nitric acid feed solutions. The transport studies involved 5.75 × 10−4 M ligand solution in 5% isodecanol modified n-dodecane. Am(III) transport was slower than that of Eu(III) under identical conditions. The transport of both Am(III) and Eu(III) increased with increasing nitric acid concentration from 1 to 6 M HNO3 suggesting a solvation extraction mechanism with nitrate ions playing a significant role. A unique preferential Eu(III) transport over Am(III) was seen at 3 M HNO3 with a transport selectivity factor (ratio of permeability coefficient values) of 6.2 which decreased upon changing the acid concentration. Carrier ligand concentration also played a significant role in transport selectivity. Membrane parameters such as permeability coefficient and effective diffusion coefficient (D eff) values were determined experimentally. The liquid membrane stability studies were also carried out.

Original languageEnglish
Pages (from-to)1775-1787
Number of pages13
JournalSeparation Science and Technology (Philadelphia)
Issue number11
Early online date12 Dec 2021
Publication statusPublished - 2022


  • Americium
  • dendrimer
  • diglycolamide
  • europium
  • transport
  • 2023 OA procedure


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