Extraction and Separation of Uranium (VI) and Thorium (IV) Using Tri-n-dodecylamine Impregnated Resins

Abstract

Extraction of U(VI) and Th(IV) from chloride and nitrate solutions with tri-n-dodecylamine impregnated on Amberlite XAD4, was investigated. The distribution of U(VI) and Th(IV) was studied at different concentrations of acid, salting-out agent, extractant, aqueous metal ion and other parameters. Absorption spectral studies have been investigated for uranium species in both aqueous HC1 solution and the resin phase. From these studies, it is suggested that the tetrachloro complex of U(VI) is formed in the extraction of uranium (VI) from hydrochloric acid solutions by TDA impregnated resin. Stripping of the extracted U(VI) and Th(IV) was assayed with HC1 and HN03. Finally, the separation of uranium from thorium and fission products in HC1 media was achieved.

Radiotracer studies for the uptake of silver from aqueous solution by TODGA-impregnated silica gel

“…The radioisotope 110m Ag in the form of AgNO 3 was supplied by BRIT, India. The chelating ligand TODGA was synthesized by the method described by Horwitz et al [28], and the other chemicals, diglycolyl chloride, dioctylamine, triethylamine, and tetrahydrofuran (THF), were purchased from Aldrich. In order to pre-RESULTS AND DISCUSSION pare TODGA-impregnated silica gel, chromatographic silica gel was taken into a 4% TODGA solution in chloroform.…”

“…TODGA (tetra-n-octyldiglycolamide) has tremendous potentiality in solvent extraction area, e.g., for uptake of lanthanides and actinides from high-and low-level liquid wastes from nuclear power plants [21][22][23][24][25][26][27][28][29]. This reagent was impregnated on an inert support, silica gel, and the behavior of this solid-phase extractant was studied to evaluate its complex formation ability and retention on the support, necessary for performing chromatographic separation.…”

Solvent extraction of Thorium(IV) from chloride acidic solution using Schiff base

“…Extensive efforts were recently focused on the extraction of thorium ions from its sources, some of the commonly employed separation methods; which precipitation (Armarego and Perrin, 2000), electrophoresis (Yekta, et al, 2014), electrodialysis (Mohammadi, et al, 2005), chromatography (Sharma and Sharma, 2007;Pathak and Argekar, 1992), flotation (Shiri, et al, 2011), ion exchange separation (Chen, etal., 2016;Metwally, et al, 2005) and solvent extraction (Patkar, et al, 2007) were studied. However, solvent extraction method has some advantages that are large capacity, simple equipment, quick and safe operation and low cost.…”

Solvent Extraction of Thorium Using 5,11,17,23-Tetra[(2-ethyl acetoethoxyphenyl)(azo)phenyl]calix[4]arene

“…In this case, the solvent extraction processes were the most interesting technique for separation and recovery of thorium [9]. Various extractants have been employed for the extraction of thorium and rare earths, such as organophosphorus reagents [10,11], amines [12][13][14], isoxazolones, crown ethers [15], fatty acid [16], and ionic liquids [17,18].…”