Thermodynamic description of U(VI) solubility and hydrolysis in dilute to concentrated NaCl solutions at T = 25, 55 and 80 °C

• Published in: Radiochimica acta Vol. 107; no. 8; pp. 663 - 678
• Main Authors: Endrizzi, Francesco, Gaona, Xavier, Zhang, Zhicheng, Xu, Chao, Rao, Linfeng, Garcia-Perez, Carmen, Altmaier, Marcus
• Format: Journal Article
• Language: English
• Published: De Gruyter 01.08.2019
• Subjects: calorimetry; clarkeite; hydrolysis; metaschoepite; sodium uranate; solubility; temperature; thermodynamics; Uranium(VI)

The solubility and hydrolysis of U(VI) were investigated in 0.10–5.6 m NaCl solutions with 4 ≤ pH  ≤ 14.3 (pH  = −log [H ]) at  = 25, 55 and 80 °C. Batch experiments were conducted under Ar atmosphere in the absence of carbonate. Solubility was studied from undersaturation conditions using UO  · 2H...