Evaluation of a novel tripodal diglycolamide for actinide extraction: Solvent extraction and SLM transport studies

Extraction of Am(iii) using novel solvent systems containing a tripodal diglycolamide ligand in room temperature ionic liquids: a ‘green’ approach for radioactive waste processing

“…As previously reported, T-DGA has limited solubility in n-dodecane alone and is fairly soluble in the diluent mixture, n-dodecane and iso-decanol (10 : 1). 14 , which is similar to that reported in several systems such as the extraction of Am 3+ and UO 2 2+ using CMPO and TODGA as the extractants, respectively. 22 Apparently, the relatively higher aqueous solubility of the butyl form of the ionic liquid was responsible for the higher metal ion extraction as will be discussed below.…”

“…The extractability trend for the elements is similar to that reported with the T-DGA-n-dodecane-iso-decanol system. 14 The relative extraction behaviour of Am 3+ vis-à-vis that of Sr 2+ and UO 2 2+ is interesting when compared to those observed with the analogous TODGA-n-dodecane system. 24 The separation factor values are listed in Table 3.…”

“…11 On the other hand, functionalized diglycolamides were found to be more efficient that TODGA and a tripodal diglycolamide (T-DGA) has shown unique actinide extraction properties. [12][13][14] Usually, the dielectric constant of the diluent decides the number of extractant molecules being associated in the extracted species. 15 With TODGA as the extractant, the number of extractant molecules in the extracted species vary from 2 for nitrobenzene (dielectric constant of 35.6 16 ) to 4 for n-dodecane (dielectric constant of 2.012 16 ) for Am(III) bearing extracted species.…”

Unique selectivity reversal in Am3+–Eu3+ extraction in a tripodal TREN-based diglycolamide in ionic liquid: extraction, luminescence, complexation and structural studies

“…8 Ionic liquids, apart from having a low vapour pressure and a lower tendency for inflammability, show very large enhancements in the metal ion extraction as compared to molecular diluents. 13 Previous studies with a C-pivot tripodal diglycolamide (T-DGA) ligand have indicated very high D Am values at 3 M HNO 3 (usual feed acid concentration for high level radioactive wastes) in molecular diluents, 14 15 In the present study, the extraction/separation behaviour of a new type of N-pivot DGA ligand, DGA-TREN ( Fig. 10 In general, though selectivities in ionic liquids are found to improve manifold as compared to molecular diluents for the Am 3+ -UO 2 2+ (or Am 3+ -Pu 4+ ) pair in DGA extractants, similar observations were not made for the Am 3+ -Eu 3+ pair.…”

Mathematical modeling of the extraction of uranium(VI) into a polymer inclusion membrane composed of PVC and di-(2-ethylhexyl) phosphoric acid

“…Studies on membrane separation of uranium have included systems based on bulk liquid membranes, emulsion liquid membranes and supported liquid membranes [18][19][20][21][22][23]. Whilst the current techniques of separating uranium are considered costeffective and relatively efficient, many workers have sought to find safer methods for separation where chemical inventories are reduced.…”