Binding Characteristics and Dissociation Kinetics for Iron(II) Complexes with Seawater Extractable Organic Matter and Humic Substances in a Compost

作者：Iwai Hisanori; Fukushima Masami^*; Yamamoto Mitsuo

来源：Analytical Sciences, 2012, 28(8): 819-821.

DOI：10.2116/analsci.28.819

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 Delta H-double dagger 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.

• 出版日期2012-8