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It is widely accepted that the complexation of iron (Fe) with organic compounds is the primary factor that regulates Fe reactivity and its bioavailability to phytoplankton in the open ocean. Despite considerable efforts to unravel the provenance of the many organic ligands present in the ‘ligand soup’ and their contribution to Fe chemistry, much of this pool remains largely unresolved. Bacteria and...
Iron speciation and iron species transformation were investigated in three membrane bioreactors (MBRs) differing in feed iron concentration (and oxidation state) and the presence or absence of an anoxic chamber to simulate various feed stream conditions and operational configurations. The concentration of dissolved Fe(II) was below detection limit (i.e., <0.1μM) in all chambers while the concentration...
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