How Temperature and Saturation Affect Diopside Dissolution
Author Information
Author(s): Dixit Suvasis, Carroll Susan A
Primary Institution: Lawrence Livermore National Laboratory
Hypothesis
Does the dissolution history of diopside impact its measured dissolution rates?
Conclusion
Diopside dissolution rates decrease significantly as equilibrium is approached, and both ion exchange and pit nucleation models can describe this process.
Supporting Evidence
- Diopside dissolution rates were measured at temperatures ranging from 125 to 175°C.
- The study found that dissolution rates decreased by two orders of magnitude as equilibrium was approached.
- Both ion exchange and pit nucleation models were used to describe the dissolution process.
Takeaway
When diopside dissolves in water, it does so more slowly as it gets closer to being fully dissolved, and scientists can explain this using two different models.
Methodology
Steady-state dissolution rates of diopside were measured using a titanium flow-through reactor at varying temperatures and solution saturation states.
Limitations
The study did not experimentally determine the equilibrium constant of diopside.
Digital Object Identifier (DOI)
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