Dissolution and solubility of the calcium-nickel carbonate solid solutions [(Ca_1-xNi_x)CO₃] at 25 °C.

ABSTRACT: A series of the calcium-nickel carbonate solid solutions [(Ca_1-xNi_x)CO₃] were synthesized and their dissolution in N₂-degassed water (NDW) and CO₂-saturated water (CSW) at 25 °C was experimentally investigated. During dissolution of the synthetic solids (Ni-bearing calcite, amorphous Ca-bearing NiCO₃ and their mixtures), the Ni-calcite and the Ca-NiCO₃ dissolved first followed by the formation of the Ni-bearing aragonite-structure phases. After 240-300 days of dissolution in NDW, the water solutions achieved the stable Ca and Ni concentrations of 0.592-0.665 and 0.073-0.290 mmol/L for the solids with lower Ni/(Ca + Ni) mol ratios (X_Ni), or 0.608-0.721 and 0.273-0.430 mmol/L for the solids with higher X<

SUBMITTER: Ma C 

PROVIDER: S-EPMC11607932 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature