Solid Phase Extractive Preconcentration of Some Actinide Elements Using Impregnated Carbon

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著者

    • SOMEDA H. H.
    • Nuclear Chemistry Department, Hot Laboratories Center, Atomic Energy Authority
    • SHEHA R. R.
    • Nuclear Chemistry Department, Hot Laboratories Center, Atomic Energy Authority

抄録

Apricot stone shells were carbonized under certain chemical and thermal conditions. The produced sorbent had been impregnated with different concentrations of oxalic and succinic acids. They were physically characterized and used for preconcentration of U (VI) and Th (IV) from acidified aqueous solutions. Batch equilibrium studies revealed that a quantitative preconcentration could be achieved at pH ∼2 for U (VI) and ∼1.3 for Th (IV). The equilibrium time was extended up to 24 h for U (VI) and 40 min for Th (IV). The modified sorbent showed a superior extractability for U (VI) and Th (IV) with distribution coefficient mean alues of 2084 and 7808 mL g<SUP>-1</SUP>, respectively. The sorption capacity values are 2.39 and 8.47 mg g<SUP>-1</SUP> for U (VI) and Th (IV) sorption onto apricot stone anchored with oxalic acid and 2.3 and 9.18 mg g<SUP>-1</SUP> for sorbent anchored with succinic acid. Desorption of loaded uranium ions was effectively achieved using 1 M HNO<SUB>3</SUB> while only 0.5 M HNO<SUB>3</SUB> was recommended to release retained thorium ions.

収録刊行物

  • Journal of Nuclear and Radiochemical Sciences  

    Journal of Nuclear and Radiochemical Sciences 7(2), 37-43, 2006-12-01 

    The Japan Society of Nuclear and Radiochemical Sciences

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各種コード

  • NII論文ID(NAID)
    10021101462
  • NII書誌ID(NCID)
    AA11948402
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13454749
  • データ提供元
    CJP書誌  J-STAGE 
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