Bulletin of the Korean Chemical Society

  • 제26권11호
  • /
  • Pages.1692-1694
  • /
  • 2005
  • /
  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지
DOI QR코드

DOI QR Code

The Reduction of Np(VI) by Acetohydroxamic Acid in Nitric Acid Solution

  • Chung, Dong-Yong (Department of Nuclear Chemical Engineering, Korea Atomic Energy Research Institute) ;
  • Lee, Eil-Hee (Department of Nuclear Chemical Engineering, Korea Atomic Energy Research Institute)
  • 발행 : 2005.11.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Spent nuclear fuel is reprocessed commercially by the chemical process to recover U and Pu. Recently, new salt-free reagents to separate plutonium and neptunium from uranium suitable for use in a single cycle flowsheet have been developed. Acetohydroxamic acid $(CH_3CONHOH)$ has been taken much interest in as a complexing agent capable of selective stripping of tetravalent actinides from U(VI) when actinides are present in the solvent stream of the advanced PUREX process. Additionally acetohydroxamic acid will rapidly reduce Np(VI) to inextractable Np(V) thus allowing the separation of Np from U. In this study, the rate equation for the reduction of Np(VI) to Np(V) in nitric acid aqueous solution has been determined as: $-[NpO_2^{2+}]$/dt = $k[NpO_2^{2+}]$[AHA] with k = 191.2 ${\pm}$ 11.2 $M^{-1}s^{-1}$ at 25 ${\pm}$ 0.5 ${^{\circ}C}$ and $[HNO_3]$ = 1.0 M. Comparison with other reductants available in the literature, acetohydroxamic acid is a strong one for $NpO_2^{2+}$.

키워드

참고문헌

  1. Drake, V. A. Science and Technology of Tributylphosphate, Vol. III. Applications of Tributylphosphate in Nuclear Fuel Reprocessing; Schulz, W. W.; Burger, L. L.; Navratil, J. D.; Bender, K. P., Eds.; CRC Press Inc.: Florida, 1990; pp 123-145
  2. Taylor, R. J.; Denniss, I. S.; Wallwork, A. L. Nuclear Energy 1997, 36, 39
  3. Burney, G. A.; Harbour, R. M. Radiochemistry of Neptunium, NAS-NS-3060; US Atomic Energy Commission: 1974
  4. Kolarik, Z.; Dressler, P. Purex Process Related Distribution Data on Np(IV,VI), KfK-4667; Karlsruhe, 1990
  5. Taylor, R. J.; May, I.; Wallwork, A. L.; Denniss, I. S.; Hill, N. J.; Galkin, B. Ya.; Zilberman, B. Ya.; Fedorov, Yu. S. J. of Alloys and Compounds 1998, 271-273, 534 https://doi.org/10.1016/S0925-8388(98)00146-7
  6. Taylor, R. J.; May, I. Separation Science and Technology 2001, 35, 1225
  7. Koltunov, V. S.; Taylor, R. J.; Baranov, S. M.; Mezhov, E. A.; May, I. Radiochim. Acta 1999, 86, 115
  8. Koltunov, V. S.; Baranov, S. M. Inorganica Chimica Acta 1987, 140, 3125 https://doi.org/10.1016/S0020-1693(00)81042-7
  9. Taylor, R. J.; May, I.; Koltunov, V. S.; Baranov, S. M.; Marchenko, V. I.; Mezhov, E. A.; Pastuschak, V. G.; Zhuravleva, G. I.; Saviliva, O. A. Radiochim. Acta 1998, 81, 149
  10. Taylor, R. J.; May, I. Czech. J. Phys. 1999, 49/S1, 617
  11. Taylor, R. J. J. of Nucl. Sci. and Tech. 2002, Supp.3, 886
  12. May, I.; Taylor, R. J.; Denniss, I. S.; Brown, G.; Wallwork, A. L.; Hill, N. J.; Rawson, J. M.; Less, R. J. of Alloys and Compounds 1998, 275-277, 769 https://doi.org/10.1016/S0925-8388(98)00437-X
  13. Colston, B. J.; Choppin, G. R.; Taylor, R. J. Radiochim. Acta 2000, 88, 329 https://doi.org/10.1524/ract.2000.88.6.329
  14. May, I.; Taylor, R. J.; Brown, G. J. of Alloys and Compounds 1998, 271-273, 650 https://doi.org/10.1016/S0925-8388(98)00179-0
  15. May, I.; Taylor, R. J.; Denniss, I. S.; Brown, G.; Wallwork, A. L.; Hill, N. J.; Rawson, J. M.; Less, R. J. of Alloys and Compounds 1998, 275-277, 769 https://doi.org/10.1016/S0925-8388(98)00437-X

피인용 문헌

  1. Drug Surfactant and Polymer Mediated Acid Catalyzed Hydrolysis of Acetohydroxamic Acid vol.31, pp.9, 2010, https://doi.org/10.1080/01932690903223559
  2. Complexation of U(VI), Ce(III) and Nd(III) with acetohydroxamic acid in perchlorate aqueous solution vol.289, pp.2, 2011, https://doi.org/10.1007/s10967-011-1101-3
  3. An improved PUREX process in technetium separation by stepwise reduction vol.299, pp.3, 2014, https://doi.org/10.1007/s10967-013-2888-x
  4. Synthesis and characterization of the solid uranium(VI) dioxo-diacetohydroxamate complex vol.95, pp.8, 2007, https://doi.org/10.1524/ract.2007.95.8.439
  5. A study of the kinetics of the reduction of neptunium(VI) by acetohydroxamic acid in perchloric acid vol.9, pp.1757-899X, 2010, https://doi.org/10.1088/1757-899X/9/1/012073
  6. )-hydroxamate complexes: their speciation, and kinetics and mechanism of hydrolysis vol.48, pp.2, 2019, https://doi.org/10.1039/C8DT02194E
  7. The Effect of Acetohydroxamic Acid on Extraction and Speciation of Plutonium vol.43, pp.9, 2008, https://doi.org/10.1080/01496390802122238
  8. Radioactive Tracer Tests of Two Improved TRPO Processes for High-Level Liquid Waste Using Annular Centrifugal Contactors vol.33, pp.2, 2015, https://doi.org/10.1080/07366299.2014.956495
  9. Separation of neptunium from actinides by monoamides: a solvent extraction study vol.107, pp.5, 2005, https://doi.org/10.1515/ract-2018-3074
  10. Rate determining step of reduction Np(VI) by organic reagents from 30%TBP/Kerosene to nitrate solution vol.108, pp.11, 2020, https://doi.org/10.1515/ract-2020-0028
  11. Hydroxypyridinone-based stabilization of Np(IV) enabling efficient U/Np/Pu separations in the Adapted PUREX process vol.259, pp.None, 2005, https://doi.org/10.1016/j.seppur.2020.118178