Comprehensive electron-transfer model for Fe(II) oxidation by O2 and H2O2 in natural waters.

D.W. King, R.A. Farlow

The rates of oxidation of specific Fe(II) complexes by O2 and H2O2 have been determined in well-defined media. The rates correlate well with the DeltaG of electron transfer providing a predictive tool for estimating oxidation rates of other Fe(II) complexes. Fe(II) speciation based on Pitzer's specific interaction model was combined with species specific oxidation rates. Fe(II) oxidation rates with O2 and H2O2 over a range of media composition and ionic strength typical of lake water, well-defined salt solutions, and seawater were predicted. [Table Omitted]