Adsorption of ^<60>Co on Non-ionic Macro-reticular Resin Impregnated Tetraphenylarsonium Chloride or Tetraphenylarsonium thiocyanate

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Adsorption of ^<60>Co thiocyanate on non-ionic macro-reticular resin impregnated tetra-phenylarsonium chloride (TPAC) or tetraphenylarsonium thiocyanate (TPAT) is described. It was seen that adsorption of ^<60>Co on Amberlite XAD-2 impregnated TPAC or TPAT is due to the formation of tetraphenylarsonium cobalt thiocyanate. These adsorbents were found to effectively concentrate ^<60>Co from sea water by the addition of sodium thiocyanate. Non-ionic resinous adsorbents of macro-reticular type (MR type) such as Amberlite XAD series resins have been reported to be effective adsorbents for a number of organic materials in aqueous solutions. 1) We previously reported that adsorption of various radioactive nuclides on one of the MR resin (XAD-2) could be effected if they were converted to organic salts by treating them with suitable organic ligands. 2) For example, 8-quinolinol (oxine), ammonium nitrosophenyl hydroxylamine (cupferron) and diphenylthiocarbazone (dithizone) were the effective reagents for adsorption of ^<60>Co, ^<59>Fe, ^<106>Ru, ^<144>Ce and ^<95>Zr on XAD-2.
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