Sorption of subgroup IV, V and VI elements on ion exchangers from HCI/HF solutions model experiments for chemical studies of the elements 105 and 106 in aqueous solution

The distribution coefficients of Zr, Hf, Nb, Ta, Mo, W, and Pa on cation and anion exchange resins from mixed HCl HF solutions were determined in batch experiments by radiometric measurements. From solutions of 0.05 to 0.1 M HCl with 1.0x10"-"3 M HF a separation of subgroup V and VI from subgroup IV elements is possible on DOWEX 50x8. This system is proposed for the fast on-line separation of the elements 105 and 106. In column experiments with cation exchangers W can be separated from Mo. This opens the possibility to determine the chemical behaviour of element 106 in comparison to the lighter homologs. Differences in the sorption behaviour of Ta, Nb and Pa on cation exchange resins from 0.1 M HCl 2.0x10"-"4 M HF solution should allow a statement as to which of these elements element 105 has the highest similarity. (orig.)SIGLEAvailable from TIB Hannover: RA 3692(95-48) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman