Fig. 2From: Reductive dissolution of As(V)-bearing Fe(III)-precipitates formed by Fe(II) oxidation in aqueous solutionsa, b Dissolved Fe(II) over course of reductive precipitate dissolution for a wet and b dried precipitates formed by Fe(II) oxidation at (P/Fe)init of 0 (red curves) and (P/Fe)init of 0.2 (blue curves) at (Si/Fe)init of 0, 0.5 and 1.0. Thin lines serve to guide the eye. c, d Corresponding plots of ln(1-Fe(II)/Fetot), the natural logarithm of the residual Fe(III) fraction, versus time for c wet and d dried precipitates. Solid lines were calculated with kapp derived from the linear regression of the experimental data (Table 2)Back to article page