Solubility and Thermodynamic Investigation of Meta-Autunite Group Uranyl Arsenate Solids with Monovalent Cations Na and K.

ABSTRACT: We investigated the aqueous solubility and thermodynamic properties of two meta-autunite group uranyl arsenate solids (UAs). The measured solubility products (log K_sp) obtained in dissolution and precipitation experiments at equilibrium pH 2 and 3 for NaUAs and KUAs ranged from -23.50 to -22.96 and -23.87 to -23.38, respectively. The secondary phases (UO₂)(H₂AsO₄)₂(H₂O)_(s) and trögerite, (UO₂)₃(AsO₄)₂·12H₂O_(s), were identified by powder X-ray diffraction in the reacted solids of KUA precipitation experiments (pH 2) and NaUAs dissolution and precipitation experiments (pH 3), respectively. The identification of these secondary phases in reacted

SUBMITTER: Meza I 

PROVIDER: S-EPMC10039619 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature