Jump to content

[OLD] Decoupling HS-


webmaster
 Share

Recommended Posts

From: Paul Foellbach

Subject: decoupling HS-

I attempt to model the mixing between seawater and brine. I would like to realize a Equilibrium and Disequilibrium model. Equilibrium of HS-: If I model the Sulfate-Sulfid-Equilibrium (all couples of database are coupled), the resulting dominant aqueous S-Species is H2S(aq) (ca. 2 mmolal). Disequilibrium of HS-: If I decouple HS- to inhibit the sulfate-sulfide equilibrium, HSO4 is the dominant (ca. 2 mmolal) aqueous S-species. The resulting S-Metal-minerals from equilibrium calculation are Sulfides. The resulting S-Metal-minerals from disequilibrium calculation are Oxides and no sulfides. I can't understand the dependance of S-speciation on Dis- or Equilibrium conditions ? The initial S in solution is speciated as H2S(aq). Why does the speciation of S in solution depend on equilibrium or disequilibrium at the first calculation (Equilibrium or Diseqilibrium) step. In my opinion the INITIAL (first step of equilibrium calculation) concentration of H2S(aq) = 2 mmolal in a solution doesn't change neither at equilibrium nor at disequilibrium calculation of HS- and SO4-speciation, because at the first step H2S(aq) is concentrated at 2 mmolal and not 2 mmolal HSO4. I would appreciate any help to understand these points.

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.

Guest
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.

Loading...
 Share

×
×
  • Create New...