Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
TBP 추출제에 의한 방사성 폐액 내 Rhenium의 추출거동
Extraction Behaviors of Rhenium from the Simulated Solution by TBP(Tributyl Phosphate)
HWAHAK KONGHAK, June 1999, 37(3), 439-444(6), NONE
Download PDF
Abstract
본 연구는 방사성 모의용액 내 공존하고 있는 각 원소가 Re의 추출에 미치는 영향과 장수명 핵종인 U과 Re만을 공추출하고 기타 원소는 모두 추잔상에 떨어뜨리는 조건을 찾기 위하여 TBP에 의한 Re추출을 수행하였다. Re의 추출률(ERe)은 질산농도 1M까지는 질산농도 증가에 따라 증가하다가, 1M 이후에서는 상당량의 질산이 추출되어 Re의 추출에 이용될 자유 TBP의 농도가 감소하여 급격히 감소하였다. 2M의 질산, 30% TBP에서 약 16.5%정도가 추출되었다. 또한 ERe는 TBP농도 및 O/A비 증가에 따라서는 증가하였으나, Re의 농도에는 거의 영향을 받지 않았다. 그리고 U또는 Zr이 각각 존재하는 경우 Re의 추출은 유기상에 추출된 U(또는 Zr)과 착물을 형성하여 추출되며. U보다는 Zr에 더 강력하게 착물을 형성하고 있음을 알 수 있었다. 반면에 U과 Zr이 함께 공존하고 있는 경우 ERe는 U의 농도 변화에는 거의 영향이 없고 Zr의 농도 증가에 따라서 증가하여, Re의 추출은 Zr에만 영향을 받고 있음을 알 수 있었다. 마지막으로 O/A=1.5의 조건에서 Re 및 U의 추출률이 각각 44.1%, 98.1%였고, Zr, Fe, Mo, Nd, Y, Cs, Sr등은 약 5% 미만이 추출되었다. 그러므로 U과 Re만을 공추출하여 분리하는 조업 조건으로는 다른 변수를 변화시키는 것 보다는 O/A비를 1.5정도에서 수행하는 것이 바람직하다.
Solvent extraction of heptavalent Rhenium(Re) from the simulated solution by the tributyl phosphate in n-dode-cane(TBP/NDD) was studied to find the effects of co-existing elements and an effective condition for the only co-extraction of U and Re. The extraction yields of Re(ERe) increase with concentration of nitric acid until a maximum is reached at 1 M HNO3. Above 1 M HNO3, ERe decrease rapidly because of depletion of free TBP available to extract Re due to the competition reaction of TBP and nitric acid. ERe is about 16.5 % at 30 % TBP and 2 M HNO3 and increase with free TBP concentration, and with the ratio of organic phase volume to aqueous phase volume(O/A). It has no effect with concentration of Re. In the presence of U or Zr, it is found that Re is extracted as a complex with then in the organic phase, and Re is more strongly bound to Zr than U. In the presence of both U and Zr, however, ERe increase with concentration of Zr and has no effect with concentration of U. It is also found that the extraction of Re is affected by only Zr. At O/A=1.5, the extraction yields of U and Re are about 44.1 % and 98.1 %, respectively, and those of Fe, Mo, Nd, Y, Cs and Sr are below 5 %. Therefore, optimal condition for the only co-extraction of U and Re is O/A=1.5.
References
OECD Final Report: "Status and Assessment Report on Actinide and Fission Product Partitioning and Transmutation," NEA/PTS/DOC (98)4 (1998)
Lelievre D, Boussier H, Grouiller JP, Bush RP, "Perspectives and Cost of Partitioning and Transmutationof Long-Lived Radionuclides," EUR-17485 (1996)
Kwon SG, Hwang DS, Chung DY, Lee EH, Yoo JH, HWAHAK KONGHAK, 36(5), 707 (1998)
Liser KH, Radiochim. Acta, 63, 5 (1993)
Kondo Y, Takitsuka T, "Technology Assessment of Partitioning Process," JAERI-M-94-067 (1994)
Suzuki S, Tachimori S, "Extraction of Tc by Monoamides in the Presence of Zr and U," GLOBAL'95, Versailles, France, 1216 (1995)
Takeuchi M, Tanaka S, Yamawaki M, Radiochim. Acta, 63, 97 (1993)
Kawasaki M, Omori T, Hasegawa K, Radiochim. Acta, 63, 53 (1993)
Lee EH, Kim KW, Lim JG, Kwon SG, Yoo JH, J. Korean Ind. Eng. Chem., 9(2), 232 (1998)
Pruett DJ, Sep. Sci. Technol., 16(9), 1157 (1981)
Jassim TN, Lljenzin JO, Persson G, Radiochim. Acta, 33, 163 (1983)
Pruett DJ, Mctaggart DR, J. Inorg. Nucl. Chem., 43, 2109 (1981)
Dean JA, "Lange's Hand Book," 3rd Edo, McGraw-Hill Book Company (1985)
Pruett DJ, "The Solvent Extraction of Heptavalent Technetium and Rhenium by Tributyl Phosphate," ORNL/TM-8668 (1984)
Pruett DJ, Radiochim. Acta, 28, 153 (1981)
Garraway J, Wilson PD, J. Less Common Met., 106, 183 (1985)
Jassim TN, Lljenzin JO, Lundqvist R, Persson G, Solv. Extr. Ion Exch., 2(3), 405 (1984)
Jassim TN, Persson G, Lljenzin JO, Solv. Extr. Ion Exch., 2(7), 1079 (1984)
Macasek F, Radiochem. Radioanal. Lett., 22(3), 175 (1975)
Kolarik Z, Dressler P, Solv. Extr. Ion Exch., 7(4), 625 (1989)
Lelievre D, Boussier H, Grouiller JP, Bush RP, "Perspectives and Cost of Partitioning and Transmutationof Long-Lived Radionuclides," EUR-17485 (1996)
Kwon SG, Hwang DS, Chung DY, Lee EH, Yoo JH, HWAHAK KONGHAK, 36(5), 707 (1998)
Liser KH, Radiochim. Acta, 63, 5 (1993)
Kondo Y, Takitsuka T, "Technology Assessment of Partitioning Process," JAERI-M-94-067 (1994)
Suzuki S, Tachimori S, "Extraction of Tc by Monoamides in the Presence of Zr and U," GLOBAL'95, Versailles, France, 1216 (1995)
Takeuchi M, Tanaka S, Yamawaki M, Radiochim. Acta, 63, 97 (1993)
Kawasaki M, Omori T, Hasegawa K, Radiochim. Acta, 63, 53 (1993)
Lee EH, Kim KW, Lim JG, Kwon SG, Yoo JH, J. Korean Ind. Eng. Chem., 9(2), 232 (1998)
Pruett DJ, Sep. Sci. Technol., 16(9), 1157 (1981)
Jassim TN, Lljenzin JO, Persson G, Radiochim. Acta, 33, 163 (1983)
Pruett DJ, Mctaggart DR, J. Inorg. Nucl. Chem., 43, 2109 (1981)
Dean JA, "Lange's Hand Book," 3rd Edo, McGraw-Hill Book Company (1985)
Pruett DJ, "The Solvent Extraction of Heptavalent Technetium and Rhenium by Tributyl Phosphate," ORNL/TM-8668 (1984)
Pruett DJ, Radiochim. Acta, 28, 153 (1981)
Garraway J, Wilson PD, J. Less Common Met., 106, 183 (1985)
Jassim TN, Lljenzin JO, Lundqvist R, Persson G, Solv. Extr. Ion Exch., 2(3), 405 (1984)
Jassim TN, Persson G, Lljenzin JO, Solv. Extr. Ion Exch., 2(7), 1079 (1984)
Macasek F, Radiochem. Radioanal. Lett., 22(3), 175 (1975)
Kolarik Z, Dressler P, Solv. Extr. Ion Exch., 7(4), 625 (1989)
