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- W2055097785 abstract "Reservoirs frequently require dredging to remove accumulated sediment. This sediment is currently unused, but represents a possible source of humic acids (HAs) that have potential as iron-binding supplements in fertilizers. In order to evaluate the utility of these materials, we investigated the structural features and Fe(II)-binding constants or capacities of some HAs obtained from reservoir sediments. The histidine content in the HAs was correlated to the Freundlich binding constant for an Fe(II)-HA complex, indicating that indole moieties in histidine function as strong binding sites for Fe(II). The binding capacities (2.2–3.2 mmol g−1) indicated that the HAs have the capacity to be loaded with 12–18% Fe(II), comparable to the iron content of previously reported Fe fertilizers that employ HAs from other sources (2–17%). The Fe(II)-binding capacities were positively correlated with the content of phenolic hydroxyl groups. In addition, the positive correlation between Fe(II)-binding capacity and vanillyl moieties in the HAs indicates that 3,4-dihydroxybenzene and/or benzoic acid derivatives also serve as Fe(II) binding sites." @default.
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- W2055097785 date "2012-01-01" @default.
- W2055097785 modified "2023-10-01" @default.
- W2055097785 title "Structural Features and Fe(II)-Binding Capacities of Humic Acids from Reservoir Sediments" @default.
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- W2055097785 doi "https://doi.org/10.1252/jcej.11we211" @default.
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