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Fig. 6. Experimentally determined Fe dissolution from ferrihydrite versus the formation constants (log KFe) of the FeLn-1 complexes (FeLn-1). Formation constants were obtained from the NIST Database 46, and experimental data were obtained from reactions of 7.14-g ferrihydrite L–1 (1/4 maximum P-adsorption sites filled) with 0.0357 M organic ligand for 28 min. Each data point represents the mean of three replications, with error bars representing standard error. Each point represents one of the six organic ligands, according to log KFe as presented in Table 2.
