Predominance diagrams

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  As-Fe-S-H2O predominance diagram, including adsorbed As, calculated with the 'grid' approach (101 x 101 grid).
• 
  The same as above but calculated with the 'hunt and track' approach.
• 
  U-C-H2O predominance diagram.

Speciation plots

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  Vanadium speciation vs pH (oxidising).
• 
  Aluminium solubility vs pH.

Reaction path calculations

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  An example of a redox ladder calculated using REACTION.

Fitting

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  Fitting data for As(V) sorbed by HFO according to the DLM.

Contouring

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  Contour plot of dissolved As in the presence of Fe