An advanced method, in which electrodialysis separation of sodium nitrate and decomposition of nitrate ion are combined, has been developed to remove nitrate ion from low-level radioactive liquid wastes including nitrate salts of high concentration. In the electrodialysis separation, the sodium nitrate was recovered as nitric acid and sodium hydroxide. When they are reused, it is necessary to reduce the quantity of impurities getting mixed with them from the waste fluid as much as possible. In this study, therefore, a cation exchange membrane with permselectivity for sodium ion and an anion exchange membrane with permselectivity for monovalent anion were employed. Using these membranes sodium and nitrate ions were effectively removed form a sodium nitrate solution of high concentration. And also it was confirmed that sodium ion was successfully separated from cesium and strontium ions and that nitrate ion was separated from sulfate and phosphate ions.
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ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management
October 3–7, 2010
Tsukuba, Japan
Conference Sponsors:
- Nuclear Engineering Division and Environmental Engineering Division
ISBN:
978-0-7918-5452-5
PROCEEDINGS PAPER
Separation and Recovery of Sodium Nitrate From Low-Level Radioactive Liquid Waste by Electrodialysis Available to Purchase
Yoshihiro Meguro,
Yoshihiro Meguro
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Atsushi Kato,
Atsushi Kato
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Yoko Watanabe,
Yoko Watanabe
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Kuniaki Takahashi
Kuniaki Takahashi
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
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Yoshihiro Meguro
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Atsushi Kato
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Yoko Watanabe
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Kuniaki Takahashi
Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
Paper No:
ICEM2010-40082, pp. 75-79; 5 pages
Published Online:
April 5, 2011
Citation
Meguro, Y, Kato, A, Watanabe, Y, & Takahashi, K. "Separation and Recovery of Sodium Nitrate From Low-Level Radioactive Liquid Waste by Electrodialysis." Proceedings of the ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 1. Tsukuba, Japan. October 3–7, 2010. pp. 75-79. ASME. https://doi.org/10.1115/ICEM2010-40082
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