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Godfrey

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About Godfrey

  • Rank
    Newbie
  • Birthday 02/06/1980

Profile Information

  • Gender
    Male
  • Location
    South Africa
  • Interests
    environmental geochemistry
  1. act2

    Hi Thanks very much for the assistance on ACT2. I have another question on the drawing an ACT2 diagram for Al species against pH. I know that at pH greater than 11 the most stable mineral phase that exists is ETTRINGITE but on my diagram the phase that is predominate is Al(OH)4-. Is there a way to edit the database to suit what I want to depict in the diagram.
  2. act2

    Hi I am trying to draw the act2 for Fe species at different pH. The problem is that not all of the species are showing in the diagram. The species that are appearing if l click the log icon are: Subdiagram #7: Fe+++ with K+, CaOH+, Brucite, Na+, Al(OH)4-, Mn(OH)2(am) Loaded 14 species and minerals: Fe+++ Fe(OH)2+ Fe(OH)3 Fe(OH)4- Fe2(OH)2++++ Fe3(OH)4(5+) FeOH++ Fe(OH)3(ppd) Ferrite-2-Ca Ferrite-Ca Ferrite-Mg Goethite Hematite NaFeO2© Subdiagram #8: Fe+++ with K+, Portlandite, Brucite, Na+, Al(OH)4-, Mn(OH)2(am) Loaded 14 species and minerals: Fe+++ Fe(OH)2+ Fe(OH)3 Fe(OH)4- Fe2(OH)2++++ Fe3(OH)4(5+) FeOH++ Fe(OH)3(ppd) Ferrite-2-Ca Ferrite-Ca Ferrite-Mg Goethite Hematite NaFeO2© All of these minerals are not appearing in the plot. Can you please help me to sort this problem. Please find attached the act2 file. Regards Fe-pH.ac2
  3. REACT

    One of my colleague want to use the GWB for carbon dioxide sequestration. So she want to use REACT and its not active on GWB essential. Do you think we should upgrade to GWB standard in order to use REACT. Regards Godfrey
  4. Spece8

    HI Tom The error is still coming up. You see after running the Spec8 it gives this: Solving for species distribution. Loaded: 159 aqueous species, 148 minerals, 7 gases, 0 surface species, 19 elements, 15 oxides. l want to find out the % distribution of the 158 species and the 148 minerals and the saturation indices of these minerals. Are you by any chance planning to have a training here in South Africa by any chance? Regards Godfrey.
  5. Spece8

    l have just bought a GWB software and l want to speciate the mine water that l am working on but l am getting an error as below Solving for species distribution. Loaded: 159 aqueous species, 148 minerals, 7 gases, 0 surface species, 19 elements, 15 oxides. *N-R didn't converge after 999 its., maximum residual = 1, Xi = 0.0000 Largest residual(s): Resid Resid/Totmol Cbasis -------------------------------------------------------- Al+++ 8.358e+206 1 1.#QO B(OH)3 6.241e+201 1 1.#QO Ba++ 1.526e+201 1 1.#QO Ca++ 1.505e+201 1 1.#QO Cr+++ 2.861e+203 1 1.#QO Cu++ 2.052e+201 1 1.#QO Fe+++ 2.652e+203 1 1.#QO K+ 5.12e+200 1 1.#QO Mg++ 3.356e+202 1 1.#QO Mn++ 8.049e+201 1 1.#QO Na+ 1.084e+201 1 1.#QO Rb+ 1.812e+200 1 1.#QO Sr++ 1.28e+201 1 1.#QO Zn++ 1.906e+201 1 1.#QO Cl- 1.37e+202 1 1.#QO SO4-- 2.306e+202 1 1.#QO HCO3- 2.438e+202 1 -1.#IO -------------------------------------------------------- my input file is attached. Godfrey. field trip water analysis.gss
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