Process Development for Bulk Separation of Trivalent Actinides and Lanthanides from Radioactive High-Level Liquid Waste

TODGA based w/o microemulsion in dodecane: An insight into the micellar aggregation characteristics by dynamic light scattering and viscometry

“…TODGA (99.5%, density 0.96) was synthesized in our laboratory by the condensation of diglycolylchloride and dioctyl amine in the presence of triethyl amine as per the known procedure [22]. AR grade n-dodecane and nitric acid were obtained from Numex Chemical Corporation, India and were used as such.…”

Facilitated transport of uranium(VI) across supported liquid membranes containing T2EHDGA as the carrier extractant

“…Effect of phase-modifier concentration T2EHDGA was found to form third phase at higher acidities and under loading conditions and a phase modifier was required to mitigate this problem [10]. Out of the various reagents used as phase modifier, iso-decanol was found to be the most suitable due to its relatively low acid uptake [11]. The composition of the solvent was 0.2 M T2EHDGA in n-dodecane with or without 30% iso-decanol considered suitable for actinide partitioning [11].…”

“…N,N,N ,N -Tetra-2-ethylhexyl-3-pentane-diamide (T2EHDGA) was synthesized as reported earlier [10,11]. The product was characterized by GC-MS and elemental analyzer and the purity and yield were checked by high performance liquid chromatography.…”

“…On the other hand, the branched analog, N,N,N ,Ntetra-2-ethylhexyl-3-pentane-diamide (T2EHDGA) shows higher selectivity though with lower extraction efficiency [10]. Manohar et al [11], have reported on the solvent extraction of trivalent actinides and lanthanides using T2EHDGA. In the 'actinide partitioning' strategy, two different procedures are recommended for the removal of bulk U, which can sometimes be as high as 10 g/L in the HLW.…”

Study on the gamma-ray irradiation behavior of mesoporous silica adsorbents functionalized with phosphine oxide and phosphonic acid ligands

“…The partitioning of radioactive fission products from dissolved spent nuclear fuels is a key component of processes envisioned for the safe recycling nuclear fuels and the disposition of high-level radioactive liquid wastes (HLLW) [1]. Several separation technologies, such as liquid-liquid extraction [2] and liquid-solid adsorption [3], have been developed for the efficient separation of uranium, plutonium, neptunium, trivalent actinides and other radionuclides.…”