maybright
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Posts posted by maybright
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Hello,
I made an reactive experiment with CO2-enrich brine and minerals under pressure. I have fluid sample information like most cation concentrations and the amount of CO2 exsolved at atm pressure (converted to CO2 fugacity). However I have no pH measurements at high pressure.
I would like to use GWB to calculate mineral saturation index, but I'm a bit confused about setting up pH and HCO3-. The presents of CO2 and carbonate (dolomite) should both effect pH and HCO3-, so which should I put to swap with which..?
I really appreciate if someone can show me the right way to set up the condition and calculate mineral (dolomite) SI.
Many thanks,
Jin
Calculating mineral SI without knowing pH
in The Geochemist's Workbench
Posted
Hi Brian,
Thanks for your reply.
When I use Dolomite as a swap, it means it is forced to be in equilibrium? I think in my solution Dolomite is still dissolving, so I want to calculate SI for it as well. Can I only swap CO2 with H+, and use HCO3- to equilibrate charge balance?
Best,
Jin