Jump to content
Geochemist's Workbench Support Forum

Melika Sharifi

Admin
  • Content count

    108
  • Joined

  • Last visited

  • Days Won

    2

Melika Sharifi last won the day on August 30 2018

Melika Sharifi had the most liked content!

Community Reputation

2 Neutral

1 Follower

About Melika Sharifi

  • Rank
    Moderator

Profile Information

  • Gender
    Female

Recent Profile Visitors

359 profile views
  1. Melika Sharifi

    Permeability Alteration

    Hello, Thanks for attaching your scripts. From your scripts, it looks like the concentration of some elements in the inlet fluid, such as silica SiO2(aq), is too high for seawater. Please double check the concentration of all elements and make sure you are using the correct unit. Hope this helps. Bests, Melika Sharifi Aqueous Solutions LLC
  2. Melika Sharifi

    Permeability Alteration

    Hello, In x2t, to plot porosity or permeability(along x or y), you can either plot them as a color map to see their variations over the domain at a specific time step. Or, you can plot them VS. time or position as an XY plot. Hope this helps. If you need more assistance, please attach your script so I can take a closer look at it. Thanks, Melika Sharifi Aqueous Solutions LLC
  3. Melika Sharifi

    Activation code not working

    Hello, I'm sorry to hear about your laptop. I've reset your license from our end. You should be all set to activate your license on your new laptop. Bests, Melika Sharifi Aqueous Solutions LLC
  4. Melika Sharifi

    Cannot paste GSS data into excel

    Hi Polo729, We are not sure what the problem could be. Please make sure that when you want to paste your data into Excel, you single left-click on a cell to select the cell. If you double click on a cell, and then paste your data, all your data will be pasted in that cell. Please let us know if you keep having any issues. Thanks, Melika Sharifi Aqueous Solutions LLC
  5. Dear John, From the dataset you sent us, it looks like Biotite has not been properly added to the dataset. To add a mineral or an aqueous species, you'll need to supply the necessary reaction between the new species/mineral and the basis species in the dataset, as well as the log Ks (from literature) for that reaction at different temperatures. Sections 9.2.3 and 9.2.4 in the GWB Essentials guide describe how to add reactions to your dataset using TEdit. I think you'll also find the tutorial entitled "How do I add new elements, species, and reactions" helpful. Bests, Melika Sharifi Aqueous Solutions LLC
  6. Dear Marc, I've reset your license from our end. You should be all set to activate it again. Bests, Melika Sharifi Aqueous Solutions LLC
  7. Dear Erik, I just wanted to let you know that "calling cumulative mass influxes and effluxes over simulation" will be added to the GWB commands in our next release. Thank you for your valued feedback and suggestion. Bests, Melika Sharifi, Aqueous Solutions LLC
  8. Melika Sharifi

    About ACT2 result problem

    Dear Betty, Act2 can be useful for understanding the geochemical conditions under which various mineral are stable. It calculates and plots activity-activity diagrams. This class of diagrams shows the stability of minerals and the predominance of aqueous species in chemical systems. A species activity, gas fugacity, activity or fugacity ratio, pH, Eh, or pe may serve as an axis variable. If you are trying to simulate reaction paths and precipitation/dissolution of minerals, you may need to use React. You specify the concentration of fluid components in your initial system, define a reaction path, and React computes the change in your initial system as it undergoes the defined reaction. Hope this helps. Bests, Melika Sharifi, Aqueous Solutions LLC
  9. Melika Sharifi

    About ACT2 result problem

    Dear John, Act2, shows the stability of minerals and predominance of aqueous species for a single “element” or component, the diagram species, over the chosen axes: pH and Eh in your case. They’re allowed to complex with any of the ligands that you specify in the “in the presence of” field. Thus, when you add Fe++ to the "in the presence of field", you define the activity of Fe++ and allow it to make complexes with your main species. Thus, theoretically, you should get a different plot from when you don't have Fe++. However, there are a few things in your plot that I think might not be set correctly: 1. If you are looking at the speciation of sulfur, there is no need to swap Pyrite in. Pyrite will show up on your plot if it is stable over the defined pH-Eh range. 2. if you know that your complexing species reacts under changing Eh or pH, you can include that in your graph using the "speciate over x”, “speciate over y”, or “speciate over x-y" options from the pulldown next to where you define your complexing species activity. For example., Fe++ would speciate and/or change oxidation state in response to changing pH and Eh. Finally, to check your simulated environment go to the “plot” plane --> “view results” to see all the reactions and the activity of species in your system. Hope this helps. Bests, Melika Sharifi Aqueous Solutions LLC
  10. Melika Sharifi

    Built-in Kinetic Rate Law

    Dear Erik, GWB does not determine which species to include as a promoting or inhibiting one, but it is the user who has an option to do so based on data from literature or from their lab experiments. For more information, please read section 4.2.1 "Promoting and inhibiting species" in the GWB Reaction Modeling Guide. Bests, Melika Sharifi, Aqueous Solutions, LLC
  11. Melika Sharifi

    Raffinate Solution X2t Model

    Hi Erik, Thanks for providing the additional information. If you see rapid dissolution of minerals in your system, they should not be set as being in equilibrium with your initial system. You can, instead, put them on the Reactants pane as kinetic minerals. Another thing that you might find helpful is to set Cl- as the balance species. Bests, Melika Sharifi, Aqueous Solutions, LLC
  12. Melika Sharifi

    Setting the CO2 quantity

    Dear Zsofia, The GWB's default thermo dataset, thermo.tdat, is compiled along the steam saturation curve from 0 -300 C. we don't currently account for the effects of pressure on the stability of species and you cannot control the pressure independently from the temperature, but you can certainly set the partial pressure or fugacity of gases in the initial system , but there are no "sliding partial pressure" paths. Hope this helps. Bests, Melika Sharifi, Aqueous Solutions, LLC
  13. Melika Sharifi

    Raffinate Solution X2t Model

    Hello Elg0086, Thanks for attaching your X2 script. I took a look at it and noticed a few issues: 1. You have constrained your initial system with several minerals that are quite unstable at the pH/T/oxidation state defined for your system. For example, Anorthite is not very stable at the pH-T of your initial system. 2. There are not many environments in which magnetite is in equilibrium with a very oxidizing solution/atmosphere. Thus, magnetite puts a lot of ferrous iron into the system. Even after removing magnetite from your system, you still have a solution which is way too concentrated with Cl-, SO4--, Na+, and Ca++. I would recommend that you start with React and check the initial state (Run-->Go initial) of your X2T initial system as well as your inlet fluids before moving to X2T. Hope this helps. Bests, Melika Sharifi, Aqueous Solutions, LLC
  14. Melika Sharifi

    Activation failed

    Hi Lizel, Thank you for your message. By now, you should have received an e-mail from GWB including a link and instructions on how to re-apply. Please let us know if you still have any issues. Bests, Melika Sharifi Aqueous Solutions, LLC
  15. Melika Sharifi

    Problem plotting graphs

    Dear Idrisnda, Thanks for posting your question on the forum. Unfortunately, I don't quite understand your question. If you are trying to plot more than one sample, you can right-click on the plot-->Configure Plot..., and then go to the Samples pane in the Parameters box and pick the samples you want to show on the graph. If you are still having issues plotting your samples, please attach your GSS file here. Bests, Melika Sharifi, Aqueous Solutions LLC
×