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Published: 2017-03-30
Abstract Views: 121
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DOI: https://doi.org/10.53747/jnst.v7i1.116
Issue
Vol. 7 No. 1 (2017)
Section
Articles
How to Cite
Pham, Q. L., Nguyen, H. L., Nguyen, V. C., Vuong, H. A., Luu, C. N., Nguyen, T. T., & Le, X. H. (2017). The study on preparing absorbent of potassium nickel hexacyanoferrate (II) loaded zeolite for removal of cesium from radioactive waste solutions and stable solidification method for those spent absorbents. Nuclear Science and Technology, 7(1), 28-36. https://doi.org/10.53747/jnst.v7i1.116

The study on preparing absorbent of potassium nickel hexacyanoferrate (II) loaded zeolite for removal of cesium from radioactive waste solutions and stable solidification method for those spent absorbents

Pham Quynh Luong1, Nguyen Hoang Lan1, Nguyen Van Chinh1, Vuong Huu Anh1, Luu Cao Nguyen1, Nguyen Thu Trang1, Le Xuan Huu1
1 Institute for Technology of Radioactive and Rare Elements (ITRRE), Vietnam Atomic Energy Institute (VINATOM)

Main Article Content

Abstract

The development of cesium selective adsorbent is urgent subject for the decontamination of intermediate and high level water from nuclear facilities especially in nuclear accidents. For the selective adsorption and stable immobilization of radioactive cesium, K-Ni- hexacyanoferrate (II) loaded zeolite (FCzeolite) (synthesized zeolite of Hanoi University of Science and Technology) were prepared by impregnation/precipitation method. The ion exchange equilibrium of Cs+ for composites FC-zeolite was attained within 5 h and estimated to be above 97% in Cs+ 100mg/l solution at pH: 4-10. Ion exchange capacity of Cs+ ions (Qmax) for FC-zeoliteX was reached 158.7 and 98.0 mg/g in pure water and sea water respectively. Those values for FC-zeolite A was 103.1 and 63.7 mg/g. Decontamination factor (DF) of FC-zeolite X for 134Cs was 149.7 và 107.5 in pure water and sea water respectively. Initial radioactivity of 134Cs ion solution infect to decontamination factor. KNiFC-zeolite X after uptaked Cs (CsFC- zeolite X) was solidificated in optimal experimental conditions: Mixing CsFC-zeolite X with additive of Na2B4O7 (5%), temperature calcined 900oC for 2h in air. Solid forms was determined some of parameters: Cs immobilization, mechanical stability, volume reduction after calcination (%) and leaching rate of Cs+ ions in solution.

Article Details

Keywords

Removal of Cs, Treatment of cesium from radioactive waste solutions

References

1. H. Mimura, I. Yamagishi, “Characterization and adsorption properties of selective adsorbents for high decontamination of cesium”, Journal of Ion Exchange, Vol.23, No.1, 6-20 (2012).
2. H. Mimura, M. Kimura, K. Akiba, Y. Onodera, “Preparation of Insoluble Ferrocyanide(KNiFC)-Loaded Silica Gels and Adsorption Properties for Cesium”, Bulletin of the Institute for Advanced Materials Processing, Tohoku University, 54(1/2),1-8(1998).
3. Hitoshi Mimura, Norihiro, Kenichi, Tohoku University, “Ion exchange properties of potasium nikel hexacyanoferrate(II) compound” Solvent extraction and ion exchange, 16(4), 1013-1031 (1998).
4. Si Jung Ye, Shung long Chen, Institu of Nuclear Science, Taiwan, Treatment of Cs-137 by zeolite impregnated with various metalic ion and zin- ferrocyanide.
5. Phạm Thị Quỳnh Lương, Hitoshi Mimura, Yuki Ikarash , Department of Quantum Science and Energy Engineering, Tohoku University Aramaki-Aza-Aoba 6-6-01-2, Sendai, 980-8579, JAPAN, Selective Adsorption and Stable Solidification of Radioactive Cesium Ions by Porous Silica Gels loaded with Insoluble Ferrocyanides, ICEM 2013, Brussels Belgium.
6. Y. Ikarashi, R. S. Masud, H. Mimura, E. Ishizaki, M. Matsukura, “Development of Stable Solidification Method for Insoluble Ferrocyanides”, Proc. of WM2013, February 24-28, 2013, Phoenix, Arizona, USA.
7. Hitoshi Mimura, Masanori Kimura,,Tohoku Uni, ‘Selective removal of cesium from radioactive waste solutions using insoluble ferrocyanide-loaded mordenites” WM 99 Conference, March, 1999.
8. H. Mimura, K. Akiba, M. Ozawa, “Preparation of Ceramic Solid Forms Immobilizing Cesium and/or Strontium and Evaluation of their Physical and Chemical Properties”, Proc. of International Conference Nuclear Energy for New Europe 2002, 1105.1-1105.8, Kraniska Gora, Slobenia, September 9-12 (2002).