Actinides selective extractants coated magnetite nanoparticles for analytical applications

Synthesis and characterization of magnetic mesoporous Fe3O4@mSiO2–DODGA nanoparticles for adsorption of 16 rare earth elements

“… 26,27 Unfortunately, no previous work has been published in which magnetic nanoparticles modified with a diglycolamide ligand were used for the adsorption of REEs. There have been reports on the synthesis of magnetic nanomaterials modified with diglycolamide ligands, including diglycolamic acid-functionalized chitosan-coated Fe 3 O 4 (Fe@CS-DGA), 28 TODGA-coated magnetite nanoparticles (Fe 3 O 4 @TODGA), 29 and DGA-methacrylate-coated Fe 3 O 4 particles (Fe 3 O 4 @MC-DGA). 30 However, these materials were employed for removing Pb( ii ) and extracting Am( iii ) and Pu( iv ) in a nitric acid solution, but not for the adsorption of REEs.…”

Advanced Nanomaterials for Nuclear Energy and Nanotechnology

“…Over the past few decades, a new class of diamide extractants, diglycolamides (DGA), which contain ether linkages between two amide groups, has gained tremendous attention for the separation of actinides . Studies have shown that DGA forms reverse‐micellar type of supramolecular aggregates containing four ligand molecules upon equilibration with nitric acid solutions .…”

“…N,N,N′,N′‐ Tetraoctyl diglycolamides (TODGA), among several DGA groups, were found to be the most promising extractant due to their high solubility in n‐dodecane and extraordinary affinity toward Ln(III) and An(III/IV) in strong acidic solution . A recent study by Ojha et al reported that a thin layer of TODGA‐coated Fe 3 O 4 nanoparticles (20–30 nm) captured representative actinides Am(III) and Pu(IV) at 3–4 m HNO 3 concentration efficiently; however, bis(2‐ethylhexy)phosphoric acid (HDEHP)‐coated nanoparticles showed strong affinity only toward Pu(IV) in the same acidic solution. Table shows the comparison of extraction behavior of Fe 3 O 4 with TODGA coating and HDEHP coating toward Am(III) ions from 3 m HNO 3 concentration, where distribution coefficient ( D ) is a measure of extraction, which is usually used to estimate the extractant during the sorption of the metal ions from the nuclear waste.…”

A rationale for the rapid extraction of ultra-low-level uranyl ions in simulated bioassays regulated by Mn-dopants over magnetic nanoparticles

“…Hence, novel approaches to detect, separate and estimate actinides from biological samples are being developed based on co-precipitation, 2 liquid-liquid solvent extraction, 3 ion-exchange resins, 4,5 extraction chromatography 5,6 and nanotechnologies. [7][8][9][10] The extraction of actinides using a solvent extraction technique is time-consuming and also generates organic waste. The most popular method is the separation of actinides by using ion exchange and extraction chromatography resins such as TEVA, UTEVA, TRU, etc.…”