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Updated: May 19, 2026

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron (Oxy)Hydroxides, Trace Elements, and Bacteria
Published on: December 19, 2017
Binding characteristics and dissociation kinetics for iron(II) complexes with seawater extractable organic matter and
Hisanori Iwai1, Masami Fukushima, Mitsuo Yamamoto
1Laboratory of Chemical Resource, Division of Sustainable Resources Engineering, Graduate School of Engineering, Hokkaido University, Sapporo, Japan.
Abstract:
A steel-slag/compost fertilizer can be useful in supplying complex Fe(II) species to barren coastal regions. Seawater extractable organic matter (SWEOM) was examined for use as a novel chelator of Fe(II) in the compost. The dissociation kinetics for Fe(II)-SWEOM were evaluated, based on the rate of ligand-exchange with ortho-phenanthroline. The ΔH(‡) for the Fe(II)-SWEOM (19 kJ mol(-1)) was significantly smaller than the corresponding values for Fe(II) complexes with humic substances (27 kJ mol(-1)), suggesting that the Fe(II)-SWEOM is kinetically less stable.
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