TY  - JOUR
AU  - Hubscher-Bruder, Véronique
AU  - Mogilireddy, Vijetha
AU  - Michel, Sylvia
AU  - Leoncini, Andrea
AU  - Huskens, Jurriaan
AU  - Verboom, Willem
AU  - Galan, Hitos
AU  - Núñez Gómez-Aleixandre, Ana
AU  - Cobos Sabate, Joaquín
AU  - Modolo, Giuseppe
AU  - Wilden, Andreas
AU  - Schmidt, Holger
AU  - Charbonnel, Marie-Christine
AU  - Guilbaud, Philippe
AU  - Boubals, Nathalie
TI  - Behaviour of the extractant Me-TODGA upon gamma irradiation: quantification of the degradation compounds and individual influences on complexation and extraction
JO  - New journal of chemistry
VL  - 41
IS  - 22
SN  - 1369-9261
CY  - London
PB  - RSC
M1  - FZJ-2017-06842
SP  - 13700-13711 
PY  - 2017
AB  - Diglycolamides (DGAs), and in particular N,N,N′,N′-tetraoctyl diglycolamide (TODGA), are well-known candidates for the co-extraction of trivalent actinides (An(III)) and lanthanides (Ln(III)) from highly acidic aqueous solutions of nuclear waste. A derivative of TODGA, the so-called Me-TODGA with the addition of a methyl-substituent on the central part of the TODGA molecule, has been proposed to improve its stability properties and extraction behaviour. This work describes the stability and viability of Me-TODGA by studying the properties of its degradation compounds formed upon gamma irradiation. The main degradation products have been synthesised and studied individually. Particular attention has been paid to their quantification, as well as their complexation and extraction properties, for a better understanding of the degradation pathways and the behaviour of the solvents upon gamma irradiation. The extraction behaviour of irradiated Me-TODGA solvents and their degradation compounds have been studied toward the fission products and lanthanides present in a highly active raffinate (HAR) solution. Binding properties of parent molecules (TODGA and Me-TODGA) and their main degradation compounds with Ln(III) have also been determined in a homogeneous phase. All the results obtained on degradation compounds are compared with those of the parent molecules in order to assess the effects of these compounds on the separation process. Among the radiolytic compounds, 2-hydroxyoctylamides are the most problematic compounds not only because of their high affinity for lanthanides but also for other fission products.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000414440000057
DO  - DOI:10.1039/C7NJ02136D
UR  - https://juser.fz-juelich.de/record/838138
ER  -