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- W2132223912 abstract "Abstract A thermodynamic analysis of the temperature dependent equilibrium between oxygen solubility (activity) in pure water and oxygen partial pressure PO2 was undertaken. Experimental oxygen solubility sources were used to determine a set of self consistent values for the chemical potential, entropy and partial molar heat capacity of dissolved oxygen. These were combined with established thermodynamic data for gaseous oxygen to develop a single thermodynamic equation describing the relationship between gaseous oxygen fugacity, dissolved oxygen activity, temperature and the equilibrium constant k. This equation was consistent with k values calculated from published experimental solubility data for temperatures from 273 to 616 K and pressures to 60 atm, encompassing the conditions encountered during oxygen leaching operations. Within these ranges, it was shown that the gas fugacity and dissolved oxygen activity coefficients were sufficiently close to unity that the k-equation may be used to relate the molal concentration caq of dissolved O2 for any combination of temperature T (K) and PO2 (atm), c aq =P O 2 0.046T 2 +203.357T ln (T/298)−(299.378+0.092T)(T−298)−20.591×10 3 (8.3144)T The significance of the difference in heat capacity between gaseous and dissolved oxygen was discussed, leading to suggestions for incorporating the effects of dissolved mineral solutes into the oxygen solubility equation." @default.
- W2132223912 created "2016-06-24" @default.
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- W2132223912 date "1998-05-01" @default.
- W2132223912 modified "2023-10-17" @default.
- W2132223912 title "Temperature and pressure dependent solubility of oxygen in water: a thermodynamic analysis" @default.
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- W2132223912 doi "https://doi.org/10.1016/s0304-386x(98)00007-3" @default.
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