B_Kimball Posted September 13, 2018 Share Posted September 13, 2018 I am trying to estimate dissolved fluoride concentrations assuming a water sample is in equilibrium with both fluorite and calcite. This calculation gives me notably different total fluoride concentrations in GWB (~17 mg/kg F) and PHREEQC (~11 mg/kg F) when I use the wateq4f database for both programs. I have double checked to make sure the log K for fluorite solubility at 25 C is the same in both the GWB and PHREEQC versions of the database. Does anyone know why this discrepancy exists? Relevant files are attached. Thanks. fl_ca_1.txt fl_ca_1.sp8 Quote Link to comment Share on other sites More sharing options...
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