Alfisol, Item 007:

IExFit, version 3.4 Fit adsorption data based on ion exchange reaction models. Display solid & liquid & gas phase speciation diagrams as a funciton of pH & redox conditions.

Why models? Main Welcome Program Information Select File Control Center (CC) CC: Database

CC-1: Enter Ions Present CC-2: Enter Initial Conditions CC: Add Solids CC: Add Gases CC: Add Ion Adsorption Data CC: Add Ion-Exchange Model CC-3: Run Aqueous Speciation CC-3: Run Model Fit Optimization

Tab: Model Optimization Tab: Options Tab: f(pH) Mass Balance Tab: Adsorption Data Analysis Tab: f(pH) Adsorbed Tab: f(pH) Aqueous Tab: f(pH) Solids Tab: f(pH) Gases Tab: pe-pH Tab: Titration

Step 1: Enter List of Ions Present

Here you select the ions that are present in your experiments and that will be used in the exercise.

The information list on the left hand column shows the ions that have been selected thus far. Click on the Periodic Table and check the boxes next to the ions selected.

To add ions not found in the Periodic Table, such as organic ions, click on "Other" and enter the information requested. Only the "display name" and "charge" are required.