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The oxidation rates of nanomolar levels of Fe(II) in seawater (salinity S = 36.2) by mixtures of O2 and H2O2 has been measured as a function of pH (5.8–8.4) and temperature (3–35∘C). A competition exists for the oxidation of Fe(II) in the presence of both O2 (μ mol⋅L−1 levels) and H2O2 (nmol⋅L−1 levels). A kinetic model has been applied to explain the experimental results that considers the interactions...
Iron is a critical nutrient in marine systems, whose solubility is strongly influenced by the presence of natural organic ligands and sunlight. Because these parameters are never constant, and because they initiate processes that occur on a variety of timescales, equilibrium models are inadequate at predicting iron speciation in the presence of natural organic matter (NOM) and light. Instead, a dynamic...
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