Journal Article

FZJ-2018-02662

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Radiolytic and Hydrolytic Degradation of the Hydrophilic Diglycolamides

Wilden, A. (Corresponding author)FZJ* ; Mincher, B. J. ; Mezyk, S. P. ; Twight, L. ; Rosciolo-Johnson, K. M. ; Zarzana, C. A. ; Case, M. E. ; Hupert, M.FZJ* ; Stärk, A.FZJ* ; Modolo, G.FZJ*

2018
Taylor & Francis Philadelphia, PA

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Please use a persistent id in citations: http://hdl.handle.net/2128/19787  doi:10.1080/07366299.2018.1495384

Abstract: The stability of different hydrophilic diglycolamides against acid degradation and radiolysis was studied. Tetraethyldiglycolamide (TEDGA) was found to undergo degradation in nitric acid at high reaction rates at elevated temperatures with a maximum of a ~8% decrease per hour at 65°C in 4 mol L 1 HNO3. The radiolysis was studied for tetramethyldiglycolamide (TMDGA), TEDGA, methyl-tetraethyldiglycolamide (Me-TEDGA), and dimethyl-tetraethyldiglycolamide (Me2-TEDGA). The degradation rates decreased with increasing molecular weight, following the trend TMDGA > TEDGA > Me-TEDGA ≥ Me2-TEDGA. Degradation products were identified by mass spectrometric techniques and were found to be comparable to those previously reported for the radiolysis of lipophilic diglycolamides in dodecane. Significant insight into the degradation mechanism in water was gained using pulse radiolysis experiments. The •OH radical was identified as the most important reactive species and predominant mechanism of radical reaction is one of electron transfer rather than H-atom abstraction.

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Contributing Institute(s):

1. Nukleare Entsorgung und Reaktorsicherheit (IEK-6)
2. Analytik (ZEA-3)

Research Program(s):

1. 161 - Nuclear Waste Management (POF3-161) (POF3-161)
2. GENIORS - GEN IV Integrated Oxide fuels recycling strategies (755171) (755171)

Appears in the scientific report 2018

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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