Affiliation:
1. Beijing National Laboratory for Molecular Sciences (BNLMS), Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
Abstract
Abstract
γ-radiation effect on dicyclohexano-18-crown-6 (DCH18C6) aqueous solution in the presence of metal cations, such as
K+ and Sr2+, was investigated, and some pale yellow precipitates were obtained at doses above 100 kGy. It was
found that the complexation interaction of metal cations could accelerate the conversion of DCH18C6 into oligomers and the formation of
precipitates, but it did not affect the formation mechanism of precipitates. Furthermore, the salting-out effect of metal cations
played an important role in the precipitation. In order to inhibit the radiation-induced precipitation of DCH18C6 in water phase,
nitric acid with a concentration of more than 1 M could be added to the system. The methods and results for analyzing
radiation-induced products reported in this work are useful to understand the radiation chemistry behavior of DCH18C6 which is used as
the extractant in the separation of long half-life radionuclides from spent nuclear fuel.
Subject
Physical and Theoretical Chemistry
Cited by
2 articles.
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