MODELLING OF NITRIC ACID AND ACTINIDE / LANTHANIDE EXTRACTION BY CMPO-LIKE CALIXARENES

摘要

CMPO-like calixarenes are potential alternative extractants for the trivalent actinide/ lanthanide separation in nuclear fuel reprocessing. Extraction mechanisms of HNO_3 and actinide/lanthanide cations (Am(Ⅲ), Cm (Ⅲ), Eu(Ⅲ) and Ce(Ⅲ)) from nitric acid media are investigated for the calix arenes-CMPO. Spectrometric techniques (infrared spectroscopy and mass spectrometry / electrospray ionisation) give information about the way extraction is carried out (chemical groups implied in complexation, complexes formed during cation extraction). Using this information and liquid-liquid extraction results, the extraction of nitric acid and cations have been modelled.