Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste - Archive ouverte HAL Access content directly
Journal Articles Radiochimica Acta Year : 2019

Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste

(1, 2) , (1, 2) , (1, 2) , (1, 2) , (3, 4, 5)
1
2
3
4
5

Abstract

The complexation of Eu(III) by hydro-soluble degradation products (HDPs) from a radio-oxidized polyesterurethane is investigated. The polyesterurethane Estane 5703 ® (PURe) is radio-oxidized at 1000 kGy with γ-rays at room temperature. The polymer is then hydrolysed by a simplified artificial cement pore water solution (pH 13.3) for 31 days at 60 °C. The HDPs within the leachate are characterized using gas chromatography-mass spectrometry, ionic chromatography, and TOC analyser. The complexation of Eu(III) is studied by time-resolved luminescence spectroscopy (TRLS). The main HDPs are adipic acid-hexane-1,6-dioic acid-and butane-1,4-diol. Unlike HDPs from non-irradiated PURe, the HDPs from 1000 kGy γ-irradiated PURe do form complexes with Eu(III) at pH 13.3. Neither adipate nor butane-1,4-diol are responsible for this complexation. The existence of several types of complexes is evidenced by TRLS and electrospray ionization mass spectroscopy (ESI-MS): complexation reactions and operational constants are proposed. The complexes formed at high pH (from 10 to 13) are different from the lower pH complexes. The lower pH complexes are studied by ESI-MS and two ligands are identified: adipate and an oligomer.
Fichier principal
Vignette du fichier
Fromentin_2020_RCA_108_383.pdf (771.8 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-02428644 , version 1 (31-03-2021)

Identifiers

Cite

Elodie Fromentin, Diane Lebeau, Alexandre Bergounioux, Muriel Ferry, Pascal E. Reiller. Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste. Radiochimica Acta, 2019, 108 (5), pp.383-395. ⟨10.1515/ract-2019-3122⟩. ⟨cea-02428644⟩
49 View
73 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More