1 / 8

Ion Exchange

Ion Exchange. In the Gaines-Thomas convention, the activity of the sorbed ion is its equivalent fraction of the sorbing sites . File → New → Sorbing Surfaces → ion-exchange → Gaines-Thomas. You balance reactions on the exchanging cations .

morag
Download Presentation

Ion Exchange

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Ion Exchange

  2. In the Gaines-Thomas convention, the activity of the sorbed ion is its equivalent fraction of the sorbing sites. File → New → SorbingSurfaces → ion-exchange → Gaines-Thomas You balance reactions on the exchanging cations. Aqueous species are drawn from a thermo dataset to create surface reactions

  3. Choose a basis species from the list, typically an abundant monovalent cation. Right click → add Basis… → Na+ TEdit automatically fills in all entries. Click Apply

  4. Choose basis or redox species to create exchange reactions. Right click → add Basis… → Ca++ TEdit automatically fills in all entries except the selectivity coefficient, which you supply. Exchange reaction automatically written using Gaines-Thomas convention.

  5. File → New → SorbingSurfaces → ion-exchange → Vanselow The Vanselow convention is like Gaines-Thomas, except that the sorbed ion activity is the molar fraction of the sorbing sites.

  6. In the Gapon convention, you balance reactions on the sites rather than on the ions. File → New → SorbingSurfaces → ion-exchange → Gapon The sorbed ion activities can be expressed as equivalents or molar fractions.

  7. Choose a basis species from the list, typically an abundant monovalent cation. Right click → add Basis… → Na+ TEdit automatically fills in all entries. Click Apply

  8. Choose basis or redox species to create exchange reactions. Right click → add Basis… → Ca++ TEdit automatically fills in all entries except the selectivity coefficient, which you supply. Exchange reaction automatically written using Gapon convention.

More Related