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Roles of Microbial Activity and Anthraquinone-2,7-disulfonate as a Model of Humic Substances in Leaching of Iron from Hematite into Seawater
Title: | Roles of Microbial Activity and Anthraquinone-2,7-disulfonate as a Model of Humic Substances in Leaching of Iron from Hematite into Seawater |
Authors: | Aneksampant, Apichaya Browse this author | Tanaka, Atsushi Browse this author | Tu, Xuefei Browse this author | Iwai, Hisanori Browse this author | Yamamoto, Mitsuo Browse this author | Nakashima, Kazunori Browse this author | Fukushima, Masami Browse this author →KAKEN DB |
Keywords: | Anthraquinone-2,7-disulfonate | barren ground | Exiguobacterium oxidotolerans sp. | hematite | iron elution | iron reduction | seawater |
Issue Date: | Nov-2018 |
Publisher: | 日本分析化学会 |
Journal Title: | Analytical sciences |
Volume: | 34 |
Issue: | 11 |
Start Page: | 1303 |
End Page: | 1308 |
Publisher DOI: | 10.2116/analsci.18P147 |
PMID: | 30078814 |
Abstract: | Fertilization with a mixture of steelmaking slag and compost can affect the supply of dissolved iron used to restore seaweed beds, however, the mechanisms of iron elution from the fertilizer are not well understood. In the present study, the microorganism was isolated from Fe-fertilizer incubated in coastal seawater for 6 months, and was identified as Exiguobacterium oxidotolerans by 16S rDNA sequencing. The iron elutability of the bacteria was proved based on the increasing of dissolved iron by incubation with Fe2O3 (hematite) under a seawater-like condition. The value of ORP was changed by inoculated of the bacteria from ca. 0 to ca. -400 mV, which is anticipated concerning to reduction of Fe. The concentration of eluted iron was largely depended on those of organic acids produced by bacteria. From the results, it was proved that E. oxidotolerans is capable of Fe reductive eluting of iron from Fe2O3 into seawater. Anthraquinone-2,7-disulfonate (AQDS), which can play as an electron acceptor/donor between microbe and insoluble Fe2O3 particles, enhanced the effect of iron bio-leaching. |
Type: | article |
URI: | http://hdl.handle.net/2115/72335 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 中島 一紀
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