Separation of Th, U, Pa, Ra and Ac from natural uranium and thorium series

Extraction and purification of 227Ac and development of solid 219Rn source

“…With the procedure of separating actinides in reference [14], we designed a procedure to separate, purify 227 Ac and prepare 219 Rn source on the basis of characteristics of uranium ore used in the experiments and the requirements of solid 219 Rn source preparation. It is shown in Figure 1.…”

pH dependent separation of uranium by chelation chromatography using pyridine 2,6-dimethanol as a chelator: Single crystal X-ray structural confirmation of the chelated uranium complex

“…To prove that no decomposition of the uranium complex occurs at this elevated temperature, thermal study of the metal complex was performed. LOD (defined as that analyte concentration giving a signal equal to three times standard deviation of blank signal [10]) was estimated. Separation of uranium(VI) from other rare earth elements (binary mixtures) was performed.…”

“…Several authors have used a number of solid sorbents viz. octadecyl silica membrane disk [6], empore (TM) chelating resin disk [7], commercial resin [8,9], Dowex 1 × 8 and Dowex 50W × 8 [10,11], neutral polymer Amberlite XAD series [12], silica [13], activated silica gel [14], controlled pore glass [15], polyurethane foam [16] and cation or anion exchange resins [17] for the enrichment of uranium(VI) from dilute solutions prior to determination by a variety of analytical techniques. Selective binding of uranyl cation using different chelating ligands, either immobilized or chemically attached on the inert solid support like silica, alumina, naphthalene, benzophenone, polystyrene-DVB resin or activated charcoal matrix have also been reported [18][19][20][21][22][23][24][25][26].…”

Removal of Uranyl Cations From Iron-Containing Solutions Using Compositesorbents Based on Polymer Matrix

“…This approach allows one to separate uranium from thorium, which is one of the main components of monazite. Extraction [18] and ion exchange are used for separation [19]. In the last case, separation of uranium from thorium is carried out by means of control of the acid concentration.…”