[Activity V Activity Diagrams.]

Dear Jia Wang,

Thank you so much for your brilliant comments and suggestion. Sir, I am fresh and new user of the GWB. I have already managed and produced my Equilibrium phase diagrams for iron oxide-hydroxide and sulphides. What I want to know is how to produces Activity-Activity diagram to know which minerals are theoretically stable and unstable in relation to my water sample analysis.  Thant why I need guidance on how to start the Activity-Activity digram, e.g Fe2+  -  Activity of O2-, Fe3+ - Activity of O2- or Fe2+ - Activity of SO42-.

Your above explanation is good but you confused me by saying I should provide thermo database file... Therefore, below are part of my inputs files.

Sir, I want to know how to start building the Fe2+ - Activity of SO42. Thank you.

Best regard.

Usman

 

[Activity V Activity Diagrams.]

Dear Brian/All,

 

Please help and guide me on how to produce Fe2+ V activity of O2-, Fe3+ V O2- and Fe2+ V SO42- activity diagrams. Thank you.

Best regard

Usman

[Equillibrium Phase diagrams for iron oxide hydroxides and sulphides]

Dear All,

I am still new user of Geochemist's workbench software. I want create iron phase stability diagrams and i have the Geochemical data of 30 groundwater samples.

My aim is to develop Iron phase samples in Fe(II)/Fe(III) ans S(II-)/S(VI) equilibrium or disequilibrium models.

Please I need your help on how to develop the models using Act2. Please help with some examples if possible. Thank you all.

Best regard

Usman

[New user: Solubility phase diagrams and Durov diagram]

Dear Jia,

I will try and follow your suggestions. Thank you so much for the brilliant guide. I will get back to you.

Best regard

Usman

[New user: Solubility phase diagrams and Durov diagram]

Dear Brian/all members,

Please help me at your convenient time, I will be much happy if you can solve my problems. 

I have never use geochemist workbench software before, my challenging areas follows:

1. I want to swap and replace my pH values with total iron (Fet) values in the Durov diagram so that i can discuss the relationship between the high Fe concentration with the fluid compositions. 

2. Aluminum solubility phase diagram, Mg silicate phase stability diagram (Log Mg++/H+ VS pH), K silicate phase stability diagram (Log K+/H+  Vs Log a SiO2(aq)) and Na+/H+ Vs Log a SiO2(aq).

I have tried to plot these 4 diagrams, the first challenge I don't understand mg++/H+, K+/H+ data. So I tried to plot  Al, Vs pH for aluminum solubility, K Vs Si for K-silicate stability phase, etc.

 

 

1.       Mg silicate phase stability diagram (Log a Si Vs Log a Mg/H+)

I Have tried to plot the Magnesium silicate phase stability diagram, but I feel like is not correct.

I want to know how to plot my scatter data to overlap on the diagram like Aluminium solubility diagram.   

 

Attached is the data file.  Thank you.

Best regard

Usman