書誌事項
- タイトル別名
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- Effect of Divalent Cations on Ligand-Exchange Kinetics of Fe (III) -Fulvic Acid Complex and Siderophore Desferrioxamine B
抄録
The effect of divalent cations (Me: Ca2+ and Mg2+) on the ligand-exchange kinetics of Fe (III) -fulvic acid complex and desferrioxamine B (DFOB) was examined by spectrophotometrically measuring the rate of Fe (III) -DFOB complex formation at the various concentrations of Me found in natural water (0-50 mM) . A kinetic model for ligand-exchange incorporating the effects of Me was also developed. The model includes the following two pathways: (1) a disjunctive pathway where Fe (III) -fulvic acid complex initially dissociates followed by complexation of free Fe (III) by DFOB; and (2) an adjunctive pathway where DFOB directly associates with the Fe (III) -fulvic acid complex followed by dissociation of the ternary complex (DFOB-Fe (III) -fulvic acid) to form Fe (III) -DFOB. The ligand-exchange rates of both pathways were accelerated in the presence of Me. The enhanced rates were well explained by considering the ternary complex formation of Me and Fe (III) -fulvic acid complex.
収録刊行物
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- 水環境学会誌
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水環境学会誌 33 (9), 131-139, 2010
公益社団法人 日本水環境学会
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詳細情報 詳細情報について
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- CRID
- 1390001205081313792
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- NII論文ID
- 130000339255
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- ISSN
- 18813690
- 09168958
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可