Gamma radiolytic stability of CyMe4BTBP and the effect of nitric acid
Schmidt Holger,
Wilden Andreas,
Modolo Giuseppe,
Švehla Jaroslav,
Grüner Bohumir,
Ekberg Christian
Affiliations
Schmidt Holger
Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
Wilden Andreas
Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
Modolo Giuseppe
Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Forschungszentrum Jülich GmbH (FZJ), 52425 Jülich, Germany, Tel.: +49 2461 61 4896, Fax: +49 2461 61 2450
Švehla Jaroslav
Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Hlavni 1001, 25068 Husinec-Rež, Czech Republic
Grüner Bohumir
Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Hlavni 1001, 25068 Husinec-Rež, Czech Republic
Ekberg Christian
Nuclear Chemistry & Industrial Materials Recycling, Department of Chemical and Biochemical Engineering, Chalmers University of Technology, Kemigården 4, 41296 Gothenburg, Sweden
The highly selective nitrogen donor ligand CyMe4BTBP for An(III) separation by solvent extraction was irradiated in a 60Co γ-source under varying conditions. Organic solutions of 10 mmol/L ligand in 1-octanol were contacted with different concentrations of nitric acid to observe the influence of an aqueous phase during irradiation. In subsequent liquid-liquid extraction experiments, distribution ratios of 241Am and 152Eu were determined. Distribution ratios decreased with increasing absorbed dose when irradiation was performed in the absence of nitric acid. With addition of nitric acid, initial distribution ratios remained constant over the whole examined dose range up to 300 kGy. For qualitative determination of radiolysis products, HPLC-MS measurements were performed. The protective effect of nitric acid was confirmed, since in samples irradiated with acid contact, no degradation products were observed, but only addition products of the 1-octanol molecule to the CyMe4BTBP molecule.
