Proxies such as iron-speciation chemistry record the redox state of local water masses immediately above accumulating sediments. Decades of work on the behaviour of iron in marine sediments ...

X-ray absorption analysis reveals that speciation controls the solubility of iron in three large sources of aerosol iron.

The environmental behavior of iron, as well as its uptake by plants, its absorption by human and animals and its storage and transport all depend on its oxidation state, making redox speciation ...

Iron bioavailability was high enough for the bioreporter not to be iron limited in the water collected from Lake Superior. This measure of bioavailability to picocyanobacteria is relevant because ...