The Extraction of Am(III) and Fe(III) by Selected Dihexyl N,N-Dialkylcarbamoylmethyl-phosphonates, -Phosphinates and -Phosphine Oxides from Nitrate Media

Review Article: The Effects of Radiation Chemistry on Solvent Extraction 3: A Review of Actinide and Lanthanide Extraction

“…The CMPO increases the extraction efficiency for the trivalent actinides and lanthanides over that of TBP alone, due to its more basic phosphoryl group. [13] Most investigations of CMPO chemistry have concentrated on trivalent americium solvent extraction behavior. Gamma-irradiation of CMPO has adverse affects on both the forward extraction and stripping of americium from the TRUEX solvent.…”

Understanding the Dynamics of Eu3+ Ions in Room‐Temperature Ionic Liquids – Electrochemical and Time‐Resolved Fluorescence Spectroscopy Studies

“…This superiority is not a result of its ability to act as a bidentate extractant but is a result of the ability of the amide group to act as a sort of internal buffer to protect the metal-phosphoryl bond in the extractable complex from attack by hydrogen ions. [25] In this study, the electrochemical and spectroscopic prop Figure 2. As the scan rate increases, the cathodic peak current density (j pc ) increases, and the cathodic peak potential (E pc ) shifts cathodically.…”

Advanced Extraction Methods for Actinide/Lanthanide Separations

“…The buffering effect protects the metal-phosphoryl bond from direct attack by hydronium ions in highly acidic media. 24 Overall, basicity of the phosphoryl oxygen increases in the order: phosphonate (RO) 2 PO < phosphinate RO(R)PO < phosphine oxide R 2 PO; were R=alkyl. As a role, an increase in basicity increase the extraction efficiency while decrease ion selectivity.…”

“…Compounds bearing numerous residues at the nitrogen and phosphorus, in a variety of combinations, has been synthesized. 24, 29 Horwitz et. al.…”

“…24 Since the acidity of waste solutions is generally in the range of 1 to 3 M HNO 3 , the built in buffering effect of compound 1 makes the extraction process easier to control and prior acidity adjustment is not needed. The extraction of uranium and plutonium form nitric acid solution can be performed quantitatively by the extraction with the monofunctional organophosphorous compound TBP.…”