Np (V) reduction in soils: Experimental confirmation and implications for migration behavior.

Neptunium is a toxic component of radioactive waste whose migration in the environment must be illuminated. The interaction of Np(V) with a peaty-podzolic-gleyic soil profile comprising six horizons was extensively studied. Differences in the shape of the sorption dependencies indicate different mechanisms for the reactions occurring.

Experimental and Theoretical X-ray Absorption Near Edge Structure Study of UO Systems at the U L Edge.

Uranium forms a large number of oxides and its electronic state in them is of great fundamental interest. We employ X-ray absorption spectroscopy at the U L edge to differentiate between mixed oxide phases in uranium compounds. By combining experimental XANES spectra with theoretical modeling using the FEFF code, we analyze five uranium oxides: UO, UO, UO, UO, and UO.

Unexpected nanoscale CeO structural transformations induced by ecologically relevant phosphate species.

In the present study, the dissolution and microstructural transformation of CeO nanoparticles (NPs) in a phosphate-containing milieu were investigated. The dissolution behaviour of 2 nm and 5 nm CeO NPs in phosphate buffer solutions was found to differ markedly from that observed in 0.01 M NaClO.

Carbon materials for effective purification of aqueous solutions from tributyl phosphate.

This study investigates various sorbents for the effective sorption of dissolved organic substances, using tributyl phosphate (TBP) as a model compound. TBP is one of the most commonly used extractants in the nuclear industry. Four different carbon materials with high specific surface areas (2000-3000 m g) were selected for evaluation.

Assessing the biocompatibility and stability of CeO nanoparticle conjugates with azacrowns for use as radiopharmaceuticals.

The application of nanoparticles is promising for the purposes of nuclear medicine due to the possibilities of using them as vectors and transporters of radionuclides. In this study, we have successfully synthesised conjugates of CeO nanoparticles and azacrown ligands. Then, the radiolabelling conditions with radionuclides Zn, Sc and Bi were selected and the kinetic stability of the complexes in biologically significant media was evaluated.