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Regarding SIT dataset in GWB 12.0/14.0


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Dear Jia Wang,


I would like to transfer the NEA_TDB formatted with Phreeqc, the other geochemical code to the format of GWB. However, SIT (Specific ion Interaction) theory is used to calculate activity coefficients in the NEA TDB; whereas, to the best of my knowledge,  the Debye-Hückel or Pitzer equations are employed in the GWB. Is it possible to find any SIT dataset in other module of GWB? If any, can you demonstrate a right input format for me? Please refer to the attached text file [NEA_TDB_phreeqc_Nov2018 (UOH5 remove)].


Thanks for your kind assistance in dealing with my question.


Best regards,



Polly Tsai


NEA_TDB_phreeqc_Nov2018(UOH5 remove).dat

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