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Preparation and Evaluation of a Combination of Chelating Agents for the Removal of Inhaled Uranium.
Molecules
December 2024
Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China.
Inhalation of aerosolized uranium is recognized as a principal mode of exposure, posing significant risks of damage to the lungs, kidneys, and other vital organs. To enhance nuclide elimination from the body, chelating agents are employed; however, single-component chelators often exhibit limited spectral activity and low effectiveness, resulting in toxicologically relevant concentrations. We have developed a composite chelating agent composed of 3,4,3-Li(1,2-HOPO), DFP, and HEDP in optimized ratios, demonstrating marked improvements in eliminating inhaled uranium.
View Article and Find Full Text PDFEvaluation of fission product yield distributions in the U(n, f) reaction.
Appl Radiat Isot
December 2024
School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China; Engineering Research Center for Neutron Application Technology, Ministry of Education, Lanzhou University, 730000, Lanzhou, China; MOE Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou, 730000, China. Electronic address:
In this work, the phenomenological potential-driving model based on the random neck rupture model is used to calculate and evaluate the independent yields and cumulative yields of fission products for the mass/charge distribution in the U(n, f) reaction with an incident neutron energy of 0.5 MeV and 14 MeV. In particular, the energy dependence of independent yields, including Kr, Sr, Zr, Mo, Ru, Xe, Cs, Ba and Ce, is evaluated for an incident neutron energy below 20 MeV and compared with GEFY6.
View Article and Find Full Text PDFFacet-Dependent Adsorption of Rare Earth Elements (REEs) and Actinides onto Goethite: REE Pattern Variability and Cerium Anomaly.
Environ Sci Technol
December 2024
Université Paris Cité, Institut de physique du globe de Paris, CNRS, F-75005 Paris, France.
Assessing the fate of contaminants in the environment requires a deep understanding of intrinsic adsorption mechanisms on natural minerals such as Fe-oxyhydroxides. In this study, we proposed an innovative approach to probe site heterogeneities on the goethite surface by comparing the adsorption behavior of rare earth elements (REEs, including Sc, Y, and all lanthanides; Ln) except Pm, as well as Th and U. A surface loading-dependent adsorption of Ln and Y was observed, with a shift from (i) preferential middle to heavy REE adsorption and (ii) limited to substantial fractionation between Y and Ho as the loading increased.
View Article and Find Full Text PDFVenturing Past Uranium: Synthesis of a Np(IV) Polyoxomolybdate-Alkoxide Sandwich Complex.
Inorg Chem
December 2024
Department of Chemistry, University of Rochester, Rochester, New York 14627, United States.
The synthesis of a Np(IV) polyoxomolybdate-alkoxide sandwich complex, (TBA)[Np{MoO(OMe)NO}] (TBA = tetrabutylammonium), is reported. This compound represents a rare example of a neptunium polyoxometalate cluster isolated outside of water, allowing for characterization of its electrochemical properties in nonaqueous solvents. Complexation of An(IV) cations fine-tunes the redox properties of the cluster, with the observed four reversible reductive events varying slightly both in potential and peak separation depending on the actinide present.
View Article and Find Full Text PDFSpecies-specific trends of plutonium, radiocesium, and potassium-40 levels in three fish species of the Yenisei river (Siberia, Russia).
J Environ Radioact
December 2024
All-Russian Research Institute for Silviculture and Mechanization of Forestry, 15 Institutskaya str., Pushkino, 141202, Russia.
Article Synopsis
- * Results indicate no increase in plutonium levels in fish after major discharges from 2018-2020, but grayling had significantly higher Pu concentrations due to their diet of benthic invertebrates, while larger pike showed increasing Pu levels.
- * High concentrations of radiocesium and potassium were found in pike, attributed to biomagnification, leading to potential ecological risk assessments and a foundation for future research on radionuclides in freshwater ecosystems.
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