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Polly Tsai

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  1. Dear Brian, I think you might misunderstand my question. I simply would like to directly export the text file of thermo dataset. Please refer to the attached example. Polly llnl TDB (example).txt
  2. Dear Brian, As title posted, how to export text file from thermo data, e.g., thermo.com.V8.R6+? Thanks for your kind response. Polly
  3. Dear Brian, Thanks for your previous response. Based on your instruction, I repeated to run the UO2 solubility calculation by addiding uraninite to the Basis pane. The result was almost the same as that of technical report (a little bit difference of GW conditions between two sites), please refer to the attached script file (UO2 solubility_32C.rea). However, when I performed Se solubility calculation using the above same method (1.0 fee mol/l) or even I input the other arbitrary values (0.001, 0.01, 0.01...) for Se , the result showed "Newton-Raphson did not converge after 999 iterations,....". What is wrong in this case? Thanks for your further response. Polly Se solubility_32C.rea UO2 solubility_32C.rea
  4. Dear Brian, Thanks for your instruction. Based on your previous reply, the calculation result of UO2 solubility and input parameters (i.e., field data) of the groundwater conditions were shown in the attached script of React module. However, I still have the following questions. 1. The total concentration of uranium is 9.923e-07 M at the bottom of view results. Is it also a solubility value? 2. I can not see the trend chart of solubility v.s pH or pe (examples of Figs.1 and 2 in the word file) in this case. 3. The result seems significant difference, 9.923e-07 M for UO2 compared to the table 1 in the attached word file. Could you please let me know what's wrong in this case? Thanks for your further response. Polly UO2 solubility_32C.rea Regarding mineral solubility calculation_to Brian 20190609.docx
  5. Dear Brian, I would like to plot the uraninite (UO2) solubility chart with the function of pH or pe at temperatures of 25, 32 and 80°C, just like the examples in Figs. 1 and 2 captured in the technical report. When the plots have been done, the raw data should be summarized in the Table 1. Please refer to the attachment. Should I use the Tact module to perform them? Please also refer to the script of Tact. Thanks for your kind instruction. Best regards, Polly Regarding mineral solubility calculation_to Brian 20190609.docx Solubility of uraninite.tac
  6. Hi, Brian, Thanks so much for your instruction. The pH/Eh diagram at 80C has been successfully plotted after selecting the "alter logk" of config. I wondered GWB would automatically calculate the species. All the best, Polly
  7. Dear Brian, Thanks for your response. Yes, my plot without consideration of gas fugacity is not the same as that of the above technical report. Please refer to the attached plot and raw data. As to the termo dataset, ver.8.0 of GWB was used in the technical report, while mine is ver.12.0. Is it possible for different version of thermo dataset? In addition, you can find the it's also not the same plot for 25C and 80C in the technical report. Please refer to the two figures of Technical report_25C and 80. So, I think they should consider the logk value in their 80C. So far, I still don't know how to do in the next step. Polly Plot without fugacity.docx U_80C in pure water_pH vs pe_wo fugacity.ac2
  8. Dear Brian, I am not sure what the value of gas fugacity (like CO2) at high temperature (80C) in pure water (no presence of complexing ions) should be input for uranium (UO2) pH/Eh diagram? I tried to input fugacity of CO2 <-> HCO3- using arbitary data, like 1, 0.8...0.3 and the plot was not the same as that of technical report. Please refer to the attached Act2 raw data and the technical report. Thanks again for your kind help. Polly U_80C in pure water_pH vs pe.ac2
  9. Polly Tsai

    How to remove the dashed line in the mosaic diagram of Act2

    Dear Brian, Sorry! I have already know how to deal with the mosaic bounds. Polly
  10. Dear Brian, I tried the mosaic diagram and the result is the same as that of technical report based on your suggestion. However, how to remove the dashed line in the attached diagram? Thanks for your kind assistance in advance. Polly U 25 C in K area.emf
  11. Dear Brian, Thanks so much for your prompt reply. The dataset, thermo.com.V8.R6+.dat was used for the technical report and my case study. I should try the function of mosaic diagram in the GWB. Polly
  12. Dear Brian, I would like to make a pH/Eh diagram of uranium (like UO2, uraninite) in the deep groundwater i.e., under surface of 400-500m, and have two questions listed as below. 1. In my case study, the UO22+ was selected in the diagram species, but I don't know the value of activity that I should input and there is no reason to input the value in the GWB essentials guide. Is it arbitrary? I also referred to the other technical report and the activity of "1.0e-06" was used. But I still have no idea for this value, because the different ionic concentration will have an influence on the result of making Eh/pH diagram. 2. The second question, also in this module, if UO22+ is in the presence of the following table 1, i.e., the sources of anions. However, I don't make sure the correctness of input parameters in Act2 of GWB, please refer to the attachment. The result that I plotted (Polly) is different to the technicial report for the same input parameters. Please also refer to the attachment. Table 1 Cl_tot (mol/L) 8.55e-04 C_tot (mol/L) 1.15e-03 S_tot (mol/L) 9.59e-05 N_tot (mol/L) 4.03e-05 P_tot (mol/L) 2.05e-06 Si_tot (mol/L) 6.90e-04 F_tot (mol/L) 2.11e-04
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