Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Stoichiometric relation for extraction of thorium from acidic nitrate solutions with Cyanex272

Document Type : Research Paper

Authors

S Milani
M Eskandari Nasab
https://doi.org/10.24200/nst.2019.1002
Abstract
The stoichiometric relation for the extraction of thorium(IV) from acidic nitrate solutions with Cyanex272 was investigated. The effects of the extractant and nitric acid concentrations were studied. The extracted species at three different acidities (low, middle, and high levels) were found to be [Th(NO3)(OH)3.HA], [Th(NO3)(OH)2A.HA], and [Th(NO3)4.HA], respectively, based on the slope analysis method. The results showed that the extraction of thorium follow solvation mechanism in low, 0.001 M and high, 8 M concentration Nitric acid medium. While, in the middle acid conditions, 1 M, is in the form of cation exchange. The extracted Th(IV) species contain one CYANEX 272 molecule in the all acidic ranges.

Highlights

  1. D.K. Hays, Mushakov, Andrey, www. Thoriumpower.com, 45 (2006).

  2. J.E. Crawford, U.S Bur. Mines Bull, 556 (1956).

  3. F. Habashi, Department of mining and metallurgy, Laval University, Quebec city, Canada, 430-440 (1993).

  4. F.L. Cuthbert, National Lead Company of Ohio, United State of Amearica, 104-120 (1958).

  5. B. Gupta, P. Malik, A. Deep, Department of chemistry, University of Roorkee, Roorkee, Journal of Radioanalytical and Nuclear Chemistry, 251, 451- 456 (2002).

  6. N.E. El-Hefny, J.A. Daoud, Hot Laboratories Centre, Atomic Energy Authority, 13759, Cairo, Egypt, Journal of Radioanalytical and Nuclear Chemistry, 261, 357-363 (2004).

  7. M. Karve, C. Gaur, Department of chemistry, University of Mumbai, Vidyanagari, Mumbai 400 098, India, Journal of radioanalytical and nuclear chemistry, 270, 461-464 (2006).

  8. S.K. Sahu, M.L.P. Reddy, T.R. Ramamohan, Radiochimica Acta 88, 33-37 (2000).

  9. S.I. El-Dessouky, N.E. El-Hefny, J.A. Daoud,  Radiochim. Acta 92, 25–29 (2004).

  10.  S.A. Milani, M. Eskandari Nasab, J. of Nuclear Sci. and Tech., 63, 24-34 (2013).

  11. C. Moulin, B. Amekraz, S. Hubert, V. Moulin, Analytica Chimica Acta, 441,269-279 (2001).

 

  1. R.K. Biswas, H.P. Singha, Council of scientific & industrial research, New Delhi, Indian journal of chemical technology, (2007) 269-275.

  2. E.K. Hyde, Lawrence radiation laboratory, University of California, Berkeley, California, 7-15 (1960).

  3. J. Bjerrum, DISS, Copenhagen. (1941).

     

Keywords

Stoichiometric relation
Thorium extraction
Acidic nitrate solutions
Cyanex 272

  1. D.K. Hays, Mushakov, Andrey, www. Thoriumpower.com, 45 (2006).

  2. J.E. Crawford, U.S Bur. Mines Bull, 556 (1956).

  3. F. Habashi, Department of mining and metallurgy, Laval University, Quebec city, Canada, 430-440 (1993).

  4. F.L. Cuthbert, National Lead Company of Ohio, United State of Amearica, 104-120 (1958).

  5. B. Gupta, P. Malik, A. Deep, Department of chemistry, University of Roorkee, Roorkee, Journal of Radioanalytical and Nuclear Chemistry, 251, 451- 456 (2002).

  6. N.E. El-Hefny, J.A. Daoud, Hot Laboratories Centre, Atomic Energy Authority, 13759, Cairo, Egypt, Journal of Radioanalytical and Nuclear Chemistry, 261, 357-363 (2004).

  7. M. Karve, C. Gaur, Department of chemistry, University of Mumbai, Vidyanagari, Mumbai 400 098, India, Journal of radioanalytical and nuclear chemistry, 270, 461-464 (2006).

  8. S.K. Sahu, M.L.P. Reddy, T.R. Ramamohan, Radiochimica Acta 88, 33-37 (2000).

  9. S.I. El-Dessouky, N.E. El-Hefny, J.A. Daoud,  Radiochim. Acta 92, 25–29 (2004).

  10.  S.A. Milani, M. Eskandari Nasab, J. of Nuclear Sci. and Tech., 63, 24-34 (2013).

  11. C. Moulin, B. Amekraz, S. Hubert, V. Moulin, Analytica Chimica Acta, 441,269-279 (2001).

 

  1. R.K. Biswas, H.P. Singha, Council of scientific & industrial research, New Delhi, Indian journal of chemical technology, (2007) 269-275.

  2. E.K. Hyde, Lawrence radiation laboratory, University of California, Berkeley, California, 7-15 (1960).

  3. J. Bjerrum, DISS, Copenhagen. (1941).

     

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