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Radiation-Chemical Resistance of Anion Exchangers and Safety of Sorption Processes in Nitric Acid Solutions: III. Radiation-Chemical Resistance of VP-1AP Anion Exchanger |
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| Authors: | Bartenev S. A. Zachinyaev G. M. Nazin E. R. Lazarev L. N. Kalashnikov V. M. Romanovskii V. N. Strelkov S. A. Firsin N. G. Egorov G. F. Hyder M. L. |
| Affiliation: | (1) Khlopin Radium Institute, Research and Production Association, St. Petersburg, Russia;(2) Timoshenko Military Institute of Radiation, Chemical, and Biological Protection, Moscow, Russia;(3) Russian Academy of Sciences, Frumkin Institute of Electrochemistry, Moscow, Russia;(4) Sandia National Laboratory, United States |
| Abstract: | Variation of physicochemical characteristics of VP-1AP anion-exchange resin in HNO3 solutions on heating and under the action of external  -radiation up to the absorbed dose of 5 MGy was studied. It was shown that at thermal treatment of anion exchanger with increasing HNO3 concentration and temperature and under the action of ionizing radiation the total exchange capacity (TEC) and capacity with respect to strongly basic groups (Csbg) decrease. The swelling coefficients Ksw noticeably vary only in treatment in 12 M HNO3 solutions and reach a maximum of 1.4. In this case, the specific surface area of the sorbent decreases from 15.7 to 1.2 m2 g-1. Under the action of ionizing radiation the specific surface area of the irradiated anion exchanger somewhat increases and reaches 18 m2 g-1. |
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