Thermodynamic study of the complexation of uranium(VI) with nitrate at variable temperatures

Extraction of Uranium from Aqueous Solutions by Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction

“…[15,[17][18][19] There are small redshifts in the absorption peaks with increasing nitric acid concentration. For example, the most intense peak at l = 413 nm with 0.1 m nitric acid is shifted to l = 414 and 416 nm when the acid concentration is increased to 1 and 3 m, respectively.…”

Quest for Environmentally Benign Ligands for Actinide Separations: Thermodynamic, Spectroscopic, and Structural Characterization of UVI Complexes with Oxa‐Diamide and Related Ligands

“…A separate set of spectrophotometric titrations with U VI /nitrate were carried out and the value of logb 1 for UO 2 A C H T U N G T R E N N U N G (NO 3 ) + was determined to be À(0.62AE0.04) at I = 1 m and t = 25 8C. [23] This value, within the range that the scattered literature values span (from À0.77 to À0.3 at I = 1-2 m and t = 20-25 8C), [24] was accordingly used in the analysis of the titration data for U VI /L I . As the lower-right plot of Figure 1 shows, the titration of U VI / TMOGA is best represented by the formation of two U VI /L I complexes and…”

Spectrophotometric and calorimetric studies of U(VI) complexation with sulfate at (25 to 70)°C

“…Water from a Milli-Q system was used in preparing all solutions. Details on the preparation and standardization of the U(VI) stock solution were provided elsewhere [18]. Solutions of sulfate were prepared by dissolving solid Na 2 SO 4 in water.…”