Jump to content
Geochemist's Workbench Support Forum

[OLD] Suppress options


Recommended Posts

From: Laiq Rahman

Subject: Suppress options

Is there any method to prevent a basis species from appearing on a (TACT/ACT2) diagram once it has been swapped out of the basis?


From: Craig Bethke

Subject: Re: Suppress options

There is a way, but it involves making a small change to the thermo dataset. Suppose you want to suppress SO4--:

1) Save the thermo dataset under a new name, and use this as your working copy.

2) Choose another species such as HSO4- to be the new basis species. Add it to the group of basis species at the top of the dataset, and remove it from the list of aqueous species.

3) Add SO4-- to the list of redox couples. The reaction to form it should be written in terms of HSO4-, the new basis species. Use the "block" command in Rxn to balance the reaction and output the entry for the thermo data.

4) Copy the entry from Rxn_block.txt and paste to the thermo dataset.

5) Rebalance any other reactions (in this case, HS-) among the redox couples containing SO4-- so that they are written in terms of HSO4-. Again, use the "block" command of Rxn. Leave all other entries (aqueous species, minerals, ...) as they are.

6) Make sure the headers are correct: you now have one fewer aqueous species and one more redox couple.

7) Now you are ready: run Act2, read in the new thermo data (you will receive a warning that SO4--/HSO4- does not form a redox couple, which you can ignore), and suppress SO4-- in your diagram.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...