Figure 9

Comparison between Islam et al.'s data (2004) and REACT model: aqueous Fe (crosses), As(V) (triangles) and As(III) (squares) concentrations over time during Islam's experiment. Monod kinetics was used to model Fe (full line), As(V) (dashed line) and As(III) (dashed-dotted line). Eh was computed by the model from simulated redox couples Fe³⁺/Fe²⁺ (full line), HAsO₄^2-/H₃AsO₃° (dashed line) and HCO₃^-/Acetate (dashed-dotted line).