Abstract
Silica ion-exchangers impregnated new thiacalix[4]arenes compounds were prepared and investigated the adsorbed performance for Am and lanthanides. The maximum distribution coefficient of Am over the exchanger was 5000 cm 3/g in weak-acid solution. In contrast, the distribution coefficient of Nd or Eu was below 10 cm 3/g. It was shown that thiacalix[4]arenes compounds have the selective adsorption for Am. The influence of the gamma ray irradiation to the selective adsorption was also investigated.
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