Fig. 4. Trends in zero-order rate coefficients for Fe(II) dissolution during abiotic reduction of mixed-mineral suspensions as a function of added Al(III) (mmol kg^–1 suspension) as boehmite or aqueous Al(III) (AlCl₃). The inset figure shows the model fit to the data excluding inputs of 0 mmol Al kg^–1, for which the inverse of the Al(III) input (1/Al) is undefined.