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The solubilities of lead oxide (PbO) and copper oxide (CuO) in subcritical and supercritical water were measured at temperatures from 250 °C to 500 °C and pressures from 26 MPa to 34 MPa, in a flow-type apparatus. The solubility of lead oxide varied from 351 μmol/kg H 2 O at 424.9 °C and 25.9 MPa to 4406 μmol/kg H 2 O at 350.3 °C and 30.2 MPa. The solubility of copper oxide varied from 1.3 μmol/kg H 2 O at 449.8 °C and 28.0 MPa to 8.0 μmol/kg H 2 O at 324.9 °C and 28.1 MPa. A hydration reaction model was applied to correlate the data.
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Sue et al. (1999) studied this question.
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