Deep eutectic solvent-based extraction of uranium(vi) from a wide range acidity and subsequent determination by direct loading in thermal ionization mass spectrometry

Abstract

Deep eutectic solvent impregnated membrane capable of the extracting U(vi) from wide acidity range was prepared and employed for the determination of uranium by thermal ionization mass spectrometry.

Reversible Hydrophobic Deep Eutectic Solvent-Based Uranyl-Sensing Optode Film in Aqueous Streams: Color Transformation and Reusability

“…Interestingly, the broad O–H stretching band centered around 3000 cm –1 and the O–H bending vibration near 1400 cm –1 , characteristic of the carboxylic acid (COOH) group in DA, are significantly attenuated in the TOPO:DA DES. This suppression strongly indicates hydrogen bonding between the O–H from COOH in DA and the PO of TOPO as reported elsewhere also . An overlaid comparison of the FTIR spectra of the blank optode film (CTA, TOPO:DA, DES, TEPH, and Br-PADAP) and the U(VI)-loaded optode film having similar compositions is shown in Figure c.…”

“…In contrast, DESs are relatively straightforward and cost-effective to synthesize, composed of biocompatible and environmentally friendly substances, are of high purity, and made from biocompatible ingredients. − DES exhibit a crucial part in the field of separation science. − In the preparation of DESs, the individual components (HBD and HBA) and hence the formed DESs are miscible in water. − For example, Soylak and Koksal used choline chloride as an HBA within a hydrophilic DES used for microextraction of metal ions from oil samples. The intriguing challenge was to choose the HBA and HBD in such a way that the formed DES should be water-immiscible and also have an affinity for uranyl. − Gilmore et al developed an ambient-temperature hydrophobic DES using TOPO (HBA) and phenol (HBD) . This approach to liquefying the intense extracting agent in the form of a eutectic liquid results in liquids containing a high concentration of TOPO (1.9 Mol L –1 for χ TOPO = 0.50, 80 wt %), making the need for an organic diluent unnecessary.…”

A Hydrophobic Deep Eutectic Solvent for Nuclear Fuel Cycle: Extraction of Actinides and Dissolution of Uranium Oxide

“…[8] Recently, Shah et al synthesized a TOPO based DES by using itaconic acid as HBD for extraction of uranium from different pH solutions (pH = 1-9) as well as from different acidic solutions (from 1-7 M HNO 3 ) due to presence of both acidic and neutral donor ligands in DES. [9] Using large alkyl chain in both HBD and HBA results in high viscosity of DES (283 mPa.s) which hinders with the kinetics aspects of extraction. Gilmore et al used phenol as HBD which is a smaller molecule than larger alkyl chain containing acids like itaconic acid.…”