개미산 탈질에 의한 모의폐액내 Zr 및 Mo 분리제거 연구(I)

이일희; 황두성; 김광욱; 신영준; 유재형

Journal of the Korean Industrial and Engineering Chemistry, Vol.6, No.3, 404-411, June, 1995

Export Citation

개미산 탈질에 의한 모의폐액내 Zr 및 Mo 분리제거 연구(I)

Removal of Zr and Mo from the Simulated Radwaste Solution by Denitration with Formic Acid(Ⅰ)

이일희, 황두성, 김광욱, 신영준, 유재형

초록

개미산탈질에 의한 모의폐액 내 Zr, Mo 분리제거 연구를 회분식으로 수행하였다. 본 연구의 목적은 침전물로서 Zr, Mo 분리 제거하는 것과 모의폐액 내 산도를 2M에서 0.5M 이하로 감소시키는 것이며, 최적의 탈질조건은 [HCOOH]/[HNO₃]=1.5, 탈질시간 2.5hr이었다. 최적조건에서의 탈질시, 모의폐액의 산도를 0.5M 이하로 감소시킬 수 있었으며, Zr, Mo 및 Fe를 각각 99% 이상, 약86%, 약39% 정도를 공침전시켜 분리 제거할 수 있었다. 이 결과는 Mo를 제외하고 본 연구에서 설정한 요구조건을 만족시킨다. Mo 침전에 영향을 미치는 원소로는 Pd, Ru, 등 백금족원소이며, 그 효과는 Pd, Ru>>Fe>Nd 순이었다. 또한 침전물의 여과성은 대체로 양호하였다.

The removal of Zr and Mo from a simulated radwaste solution was experimentally examined by batch denigration with formic acid. The aims of this study were to separate Zr and Mo as precipitate and to reduce the acidity of simulated radwaste solution from 2 to less than 0.5M. Resulting from this study, it was found that the optimum conditions were the [HCOOH]/[HNO₃]= 1.5 and 2.5hr denitration. Under the optinum conditions, the acidity of the denitrated solution could be reduced to less than 0.5M, and Zr and Mo could be removed over 99% and 86%, respectively. Fe could be removed about 39%. These results satisfied the requirements estabilished in this study, except for about 86 % precipitation of Mo. The cause on the decrement of Mo precipitation is mainly due to the containing the platinum group metals(PGM) such as Pd and Ru. The effects of each element on the precipitation of Mo increased in the order of Pd, Ru>>Fe>Nd. Also filterability of denitrated solutions was favorable.

[References]

Saum CJ, Ford LH, Blatts N, "The Denitration of Simulated Fast Reactor High Active Liquor Waste," ND-R-658 (1981)
Rimshaw SJ, Case FN, Tompkins JA, "Volatility of Ru-106, Tc-99, I-129, and the Evolution of Nitrogen Oxide Compounds during the Calcination of High-level Radioactive Nitric Acid Waste," ORNL-5562 (1980)
Sasaki N, "Pot vitrification of High-level Radioactive Waste Denitration and Concentration Prior to the Vitrafication," PNCT 831-79-02 (1979)
Posey JC, "Process for the Recovery of Cm-244 from Nuclear Waste," ORNL-5687 (1980)
Bradley RF, Goodlett CB, "Denitration of Nitric Acid Solutions by Fromic Acid," DP-1299 (1972)
Kubota M, Morita Y, Tochiyama O, Inoue Y, "Fundamental Study on the Extraction of Transuranium Elements from High-level Liquid Waste," JAERI-M 88-002 (1988)
Hsu CN, Mimura H, Tenman M, Kanno T, Nucl. Sci. J., 23, 104 (1986)
Ito K, Kanno T, J. Nucl. Sci. Technol., 23, 37 (1986)
Kubota K, Dojris S, Kubota M, "Separation and Recovery of the Platinum Group Elements and Tc from Spent Fuel (Literature Survey)," JAERI-M 88-188 (1988)
Kondo Y, Kubota M, J. Nucl. Sci. Technol., 29, 140 (1992)
Shirahashi K, Kubota M, J. Nucl. Sci. Technol., 29, 559 (1992)
Orebaugh EG, "Denitration of Savannah River Plant Waste Streams," DP-1417 (1976)
Nakamura H, Yamaguchi I, Kubota M, J. Nucl. Sci. Technol., 29, 140 (1992)
Cotton FA, Wilkinson G, "Advanced Inorganic Chemistry," A Wiley Interscience Pub., John Wiley & Sons, New York (1988)
Music S, Ristic M, Popovic S, J. Radioanal. Nucl. Chem. Art., 134, 353 (1989)

[Referenced By]

[1] Saum CJ, Ford LH, Blatts N, "The Denitration of Simulated Fast Reactor High Active Liquor Waste," ND-R-658 (1981)

[2] Rimshaw SJ, Case FN, Tompkins JA, "Volatility of Ru-106, Tc-99, I-129, and the Evolution of Nitrogen Oxide Compounds during the Calcination of High-level Radioactive Nitric Acid Waste," ORNL-5562 (1980)

[3] Sasaki N, "Pot vitrification of High-level Radioactive Waste Denitration and Concentration Prior to the Vitrafication," PNCT 831-79-02 (1979)

[4] Posey JC, "Process for the Recovery of Cm-244 from Nuclear Waste," ORNL-5687 (1980)

[5] Bradley RF, Goodlett CB, "Denitration of Nitric Acid Solutions by Fromic Acid," DP-1299 (1972)

[6] Kubota M, Morita Y, Tochiyama O, Inoue Y, "Fundamental Study on the Extraction of Transuranium Elements from High-level Liquid Waste," JAERI-M 88-002 (1988)

[7] Hsu CN, Mimura H, Tenman M, Kanno T, Nucl. Sci. J., 23, 104 (1986)

[8] Ito K, Kanno T, J. Nucl. Sci. Technol., 23, 37 (1986)

[9] Kubota K, Dojris S, Kubota M, "Separation and Recovery of the Platinum Group Elements and Tc from Spent Fuel (Literature Survey)," JAERI-M 88-188 (1988)

[10] Kondo Y, Kubota M, J. Nucl. Sci. Technol., 29, 140 (1992)

[11] Shirahashi K, Kubota M, J. Nucl. Sci. Technol., 29, 559 (1992)

[12] Orebaugh EG, "Denitration of Savannah River Plant Waste Streams," DP-1417 (1976)

[13] Nakamura H, Yamaguchi I, Kubota M, J. Nucl. Sci. Technol., 29, 140 (1992)

[14] Cotton FA, Wilkinson G, "Advanced Inorganic Chemistry," A Wiley Interscience Pub., John Wiley & Sons, New York (1988)

[15] Music S, Ristic M, Popovic S, J. Radioanal. Nucl. Chem. Art., 134, 353 (1989)