DEHPA 추출제에 의한 악티늄족원소와 란탄족원소의 상호분리연구(II)

양한범; 이일희; 임재관; 유재형; 박현수

Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.1, 153-161, February, 1996

Export Citation

DEHPA 추출제에 의한 악티늄족원소와 란탄족원소의 상호분리연구(II)

Separation of Actinides and Lanthanides by DEHPA Extractant(Ⅱ)

양한범, 이일희, 임재관, 유재형, 박현수

초록

방사성폐액 중 주요 핵종인 ²⁴¹Am, ¹⁵²Eu 및 ²³⁷Np를 선정하여 추출제 di-(2-ethylhexyl) phosphoric acid를 사용한 용매추출법으로 이들 세 가지 핵종의 상호분리에 대해 연구하였다.²³⁷Np의 추출율을 향상시키기 위해 환원제로 H₂O₂를 첨가하여 추출한 결과 ²⁴¹Am, ¹⁵²Eu 및 ²³⁷Np 핵종 모두 99.9% 이상 추출할 수 있었다. 추출된 ²⁴¹Am, ¹⁵²Eu 및 ²³⁷Np는 세 단계의 역추출과정을 통해 상호분리한 결과 ¹⁵²Eu와 ²³⁷Np의 경우 상호분리도가 좋았으나, ²⁴¹Am의 경우 약 7∼9.6%의 ¹⁵²Eu와 ²³⁷Np가 동반 역추출되어 ²⁴¹Am용액에 대한 정제과정이 추가로 요구되었다. 용매재생과정에서 생성되는 제3상의 생성원인과 해결방법에 대해서도 논하였다.

Several main nuclides(²⁴¹Am, ¹⁵²Eu and²³⁷Np) in radioactive waste solution were selected and examined to mutual separation with di-(2-ethylhexyl) phosphoric acid by solvent extraction technique. ²³⁷Np was extracted more than 99.9% adding the H₂O₂ that was a good reductant for the oxidation state control of ²³⁷Np. ²⁴¹Am, ¹⁵²Eu and ²³⁷Np could be fairly well separated one another during the different sequence stripping stages, but about 7∼9.6% of the other nuclides were still remained for the ²⁴¹Am stripping solution. This result shows that the product of ¹⁵²Eu and ²³⁷Np was good, but ²⁴¹Am may be needed to further purification process. It was also discussed on the cause of the third phase formation phenomenon that was found in the solvent regeneration.

[References]

Yoo JH, "Development of Long-Lived Radionuclide Partitioning Technology," KAERI/RR-1332/94 (1994)
Yoo JH, "Development of Long-Lived Radionuclide Partitioning Technology," KAERI/RR-1467/95 (1995)
ICRP, "Limits for Intake of Radionuclides by Workers," ICRP Publication, Part I (1978)
ICRP, "Limits for Intake of Radionuclides by Workers," ICRP Publication, Part II (1980)
ICRP, "Limits for Intake of Radionuclides by Workers," ICRP Publication, Part III (1981)
Serne RJ, Reiyea JF, "The Status of Radionuclide Sorption-Desorption Studies Performed by the WRIT Program," PNL-3997 (1982)
Kimura T, Kobayashi Y, Akatsu T, Radiochim. Acta, 39, 79 (1986)
Lee EH, Yang HB, Lim JK, Shin YJ, Yoo JH, J. Korean Ind. Eng. Chem., 6(4), 529 (1995)
Srinivasan N, "Process Chemistry of Np," Part II, BARC-736 (1974)
Escure H, Gourrise D, Lucas J, J. Inorg. Nucl. Chem., 33, 1871 (1971)
Svantesson I, J. Inorg. Nucl. Chem., 42, 1037 (1980)
Sato T, J. Inorg. Nucl. Chem., 25, 109 (1963)
Kolarik ZJ, Horwithz EP, "The use of TBP as a Diluent Modifier," ed. W.W. Schulz, J.D. Navratil, K.P. Bender and L.L. Burger, Vol. III, CRC Press, Inc., Boca Raton, Florida (1990)
Liljenzin JO, Rydberg J, Skarnemark G, Sep. Sci. Technol., 15, 799 (1980)

[Referenced By]

[1] Yoo JH, "Development of Long-Lived Radionuclide Partitioning Technology," KAERI/RR-1332/94 (1994)

[2] Yoo JH, "Development of Long-Lived Radionuclide Partitioning Technology," KAERI/RR-1467/95 (1995)

[3] ICRP, "Limits for Intake of Radionuclides by Workers," ICRP Publication, Part I (1978)

[4] ICRP, "Limits for Intake of Radionuclides by Workers," ICRP Publication, Part II (1980)

[5] ICRP, "Limits for Intake of Radionuclides by Workers," ICRP Publication, Part III (1981)

[6] Serne RJ, Reiyea JF, "The Status of Radionuclide Sorption-Desorption Studies Performed by the WRIT Program," PNL-3997 (1982)

[7] Kimura T, Kobayashi Y, Akatsu T, Radiochim. Acta, 39, 79 (1986)

[8] Lee EH, Yang HB, Lim JK, Shin YJ, Yoo JH, J. Korean Ind. Eng. Chem., 6(4), 529 (1995)

[9] Srinivasan N, "Process Chemistry of Np," Part II, BARC-736 (1974)

[10] Escure H, Gourrise D, Lucas J, J. Inorg. Nucl. Chem., 33, 1871 (1971)

[11] Svantesson I, J. Inorg. Nucl. Chem., 42, 1037 (1980)

[12] Sato T, J. Inorg. Nucl. Chem., 25, 109 (1963)

[13] Kolarik ZJ, Horwithz EP, "The use of TBP as a Diluent Modifier," ed. W.W. Schulz, J.D. Navratil, K.P. Bender and L.L. Burger, Vol. III, CRC Press, Inc., Boca Raton, Florida (1990)

[14] Liljenzin JO, Rydberg J, Skarnemark G, Sep. Sci. Technol., 15, 799 (1980)