Crown ether-immobilized cellulose acetate membranes for the retention of GD (III)

Oana Steluta Serbanescu, Andreea Madalina Pandele, Madalina Oprea, Augustin Semenescu, Vijay Kumar Thakur*, Stefan Ioan Voicu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
53 Downloads (Pure)


This study presents a new, revolutionary, and easy method of separating Gd (III). For this purpose, a cellulose acetate membrane surface was modified in three steps, as follows: firstly, with aminopropyl triethoxysylene; then with glutaraldehyde; and at the end, by immobilization of crown ethers. The obtained membranes were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), through which the synthesis of membranes with Gd (III) separation properties is demonstrated. In addition, for the Gd (III) separating process, a gadolinium nitrate solution, with applications of moderator poison in nuclear reactors, was used. The membranes retention performance has been demonstrated by inductively coupled plasma mass spectrometry (ICP-MS), showing a separation efficiency of up to 91%, compared with the initial feed solution.

Original languageEnglish
Article number3978
Issue number22
Early online date17 Nov 2021
Publication statusFirst published - 17 Nov 2021


  • Cellulose acetate
  • Crown ether
  • Gadolinium retention


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