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Title: Gamma-radiolytic stability of new methylated TODGA derivatives for minor actinide recycling

Journal Article · · Dalton Transactions
DOI:https://doi.org/10.1039/C5DT02484F· OSTI ID:1294500
 [1];  [2];  [3];  [1];  [3];  [4];  [4];  [1];  [4];  [3];  [2];  [2]
  1. Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT), Madrid (Spain)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  3. Forschungszentrum Julich GmbH, Institut fur Energie-und Klimaforschung -Nukleare Entsorgung und Reaktorsicherheit (IEK), Julich (Germany)
  4. Univ. of Twente, Enschede (The Netherlands)
+ Show Author Affiliations

The stability against gamma radiation of MeTODGA (methyl tetraoctyldiglycolamide) and Me2TODGA (dimethyl tetraoctyldiglycolamide), derivatives from the well-known extractant TODGA (N,N,N',N';-tetraoctyldiglycolamide), were studied and compared. Solutions of MeTODGA and Me2TODGA in alkane diluents were subjected to 60Co γ-irradiation in the presence and absence of nitric acid and analyzed using LC-MS to determine their rates of radiolytic concentration decrease, as well as to identify radiolysis products. The results of product identification from three different laboratories are compared and found to be in good agreement. The diglycolamide (DGA) concentrations decreased exponentially with increasing absorbed dose. The MeTODGA degradation rate constants (dose constants) were uninfluenced by the presence of nitric acid, but the acid increased the rate of degradation for Me2TODGA. The degradation products formed by irradiation are also initially produced in greater amounts in acid-contacted solution, but products may also be degraded by continued radiolysis. As a result, the identified radiolysis products suggest that the weakest bonds are those in the diglycolamide center of these molecules.

Research Organization:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1294500
Report Number(s):
INL/JOU-15-35577; ICHBD9
Journal Information:
Dalton Transactions, Vol. 44, Issue 41; ISSN 1477-9226
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (15)

Unprecedented Inversion of Selectivity and Extraordinary Difference in the Complexation of Trivalent f  Elements by Diastereomers of a Methylated Diglycolamide journal March 2019
Application of quantum mechanical simulations for studying the radiolytic stability of prospective extractants in the nuclear fuel cycle journal October 2018
Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling journal September 2019
Ligands for f-element extraction used in the nuclear fuel cycle journal January 2017
A Study of the γ-Radiolysis of N,N -Didodecyl- N′,N′ -Dioctyldiglycolamide Using UHPLC-ESI-MS Analysis journal June 2016
Radiation chemistry of the branched-chain monoamide di-2-ethylhexyl-isobutyramide journal September 2017
Actinide–lanthanide co-extraction by rigidified diglycolamides journal December 2017
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides journal June 2018
Gamma Radiolysis of TODGA and CyMe 4 BTPhen in the Ionic Liquid Tri- n -Octylmethylammonium Nitrate journal January 2020
Radiation chemistry of the branched-chain monoamide di-2-ethylhexyl-isobutyramide text January 2017
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides text January 2018
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides text January 2018
Radiation chemistry of the branched-chain monoamide di-2-ethylhexyl-isobutyramide text January 2017
Actinide–lanthanide co-extraction by rigidified diglycolamides text January 2017
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides text January 2018

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