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Extraction of U(VI), Th(IV) and some fission products from nitric acid medium by sulfoxides and effect of γ-irradiation on the extraction

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Abstract

The extracting abilities for thorium, uranium and some fission products by five sulfoxides are given. The results show that di(2-ethylhexyl) sulfoxide (DEHSO) is not only completely miscible with kerosene, but also superior to tri-n-butyl phosphate in some properties. The extraction behavior of uranium, thorium and some fission products such as zirconium, niobium and ruthenium from aqueous nitric acid with DEHSO in kerosene has been studied over a wide range of conditions. DEHSO extracted uranium and fission products better than TBP under all conditions and is similar to TBP in extraction of thorium. A study of extraction mechanism indicates that U and Th are extracted as disolvates, whereas HNO3 is extracted as monosolvate. Extraction of the two actinides decreases with increasing temperature, indicating the extraction to be exothermic. Preliminary studies show that γ-ray irradiated DEHSO extracts Zr and Nb to a smaller extent than irradiated TBP in the range of 104–107 rad.

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Authors and Affiliations

  1. Shanghai Institute of Nuclear Research, Academia Sinica, Shanghai, (China)

    Shen Chaohong, Bao Borong, Bao Yizhi, Wang Gaodong & Qian Ju

  2. Chemistry Department, Suzhou University, Suzhou, (China)

    Cao Zhengbei

Authors
  1. Shen Chaohong
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  2. Bao Borong
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  3. Bao Yizhi
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  4. Wang Gaodong
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  5. Qian Ju
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  6. Cao Zhengbei
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Chaohong, S., Borong, B., Yizhi, B. et al. Extraction of U(VI), Th(IV) and some fission products from nitric acid medium by sulfoxides and effect of γ-irradiation on the extraction. Journal of Radioanalytical and Nuclear Chemistry, Articles 178, 91–98 (1994). https://doi.org/10.1007/BF02068660

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  • DOI: https://doi.org/10.1007/BF02068660

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