Gamma radiolytic stability of CyMe4BTBP and effect of nitric acid

0473536 - ÚACH 2017 RIV PL eng J - Journal Article
Schmidt, H. - Wilden, A. - Modolo, G. - Švehla, Jaroslav - Grüner, Bohumír - Ekberg, C.
Gamma radiolytic stability of CyMe4BTBP and effect of nitric acid.
Nukleonika. Roč. 60, č. 4 (2015), s. 879-884. ISSN 0029-5922. E-ISSN 1508-5791
R&D Projects: GA MŠMT(CZ) 7G13003
Keywords : CyMe4BTBP * Protective effect * Gamma radiolysis * Liquid-liquid extraction * Nitric acid
OECD category: Inorganic and nuclear chemistry
Impact factor: 0.546, year: 2015

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 α-hydroxy octyl radical to the CyMe4BTBP molecule.
Permanent Link: http://hdl.handle.net/11104/0270675