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γ-radiation effect on dicyclohexano-18-crown-6 aqueous solution in the presence of metal cations
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Chuhong Yu
,
Jiuqiang Li
Published/Copyright:
January 20, 2014
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.
Received: 2012-10-20
Accepted: 2013-5-28
Published Online: 2014-1-20
Published in Print: 2014-2-28
©2014 Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Editorial
- Preface
- New nuclear facilities and their analytical applications in China
- Advances in computational actinide chemistry in China
- Recent advances in study of uranium surface chemistry in China
- Nuclear fuel cycle-oriented actinides separation in China
- Radiopharmaceuticals in China: current status and prospects
- Gas-phase chemistry of Mo, Ru, W, and Os metal carbonyl complexes
- Extraction complexes of Pu(IV) with carbamoylmethylphosphine oxide ligands: A relativistic density functional study
- Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
- Evaluation study on a macroporous silica-based isohexyl-BTP adsorbent for minor actinides separation from nitric acid medium
- A density functional theory study of the competitive complexation of pyridine against H2O and Cl−− to Cm3+ and Ce4+
- Chemical behavior of neptunium in the presence of technetium in nitric acid media
- Nitrate conversion and supercritical fluid extraction of UO2-CeO2 solid solution prepared by an electrolytic reduction-coprecipitation method
- An advanced purex process based on salt-free reductants
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- γ-radiation effect on dicyclohexano-18-crown-6 aqueous solution in the presence of metal cations
