Effective separation of Am(iii) and Eu(iii) from HNO₃ solutions using CyMe₄-BTPhen-functionalized silica-coated magnetic nanoparticles

Abstract

It has been shown that CyMe4-BTPhen-functionalized silica-coated maghemite (γ-Fe2O3) magnetic nanoparticles (MNPs) are capable of quantitative separation of Am(III) from Eu(III) from HNO3 solutions. These MNPs also show a small but significant selectivity for Am(III) over Cm(III) with a separation factor of around 2 in 4 M HNO3. The water molecule in the cavity of the BTPhen may also play an important part in the selectivity.

High-Performance Alkyl Diamide Amine and Water-soluble Diamide Ligand for Separating of Am(III) from Cm(III)

“…The separation of these two closely related MAs is even more challenging than that of MA(III) and Ln(III). [3][4][5] Although various ligands and separation methods have been studied for the Am(III)/Cm(III) separation, [6][7][8][9][10][11] an effective approach for practical use has not yet been developed.…”

Separation of americium from complex radioactive mixtures using a BTPhen extraction chromatography resin

“…We then attempted cross-coupling with 3,3,6,6-tetramethylcyclohexane-1,2-dione to synthesise Br-CyMe 4 BTPhen, but we found the product of this reaction required extensive purification and was only obtained in low yield (N.B. this synthesis has since been achieved by Harwood and co-workers [15]). Therefore, we elected to replace CyMe 4 with a less sterically hindered group in order to make a more accessible triazine cavity for Am (III) which may assist complexation on the polymer.…”

The Development of Molecules for the Highly Efficient Separation of Americium(III) from Lanthanides(III)

“…45b Recently, published results report the preparation of iron oxide (Fe 2 O 3 ) MNPs coated with silica and functionalized with CyMe 4 -BTPhen in order to create a dispersible sorbent that can be magnetically collected, in order to investigate its ability to extract Am(III) from Eu(III). 50 These MNPs were capable of quantitative separation of Am(III) from Eu(III) from HNO 3 solutions (Figure 11). In the BTPhen moiety, the strongly bound water molecule in the central cavity may play an important role in the separation of Am(III) from Eu(III).…”