Roles of Microbial Activity and Anthraquinone-2,7-disulfonate as a Model of Humic Substances in Leaching of Iron from Hematite into Seawater

• ANEKSAMPANT Apichaya

  Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University

• TANAKA Atsushi

  Graduate School of Environment Science, Hokkaido University

• TU Xuefei

  Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University

• IWAI Hisanori

  Department of Marine System Engineering, Graduate School of Engineering, Osaka Prefecture University

• YAMAMOTO Mitsuo

  Ocean Alliance, The University of Tokyo

• NAKASHIMA Kazunori

  Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University

• FUKUSHIMA Masami

  Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University

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.

Journal

• Analytical Sciences

  Analytical Sciences 34 (11), 1303-1308, 2018-11-10

  The Japan Society for Analytical Chemistry

Keywords

• Anthraquinone-2,7-disulfonate
• barren ground
• <i>Exiguobacterium oxidotolerans</i> sp.
• hematite
• iron elution
• iron reduction
• seawater

Details

• CRID: 1390001288087405952
• NII Article ID: 130007503806
• NII Book ID: AA10500785
• DOI: 10.2116/analsci.18p147
• ISSN: 13482246
• ISSN: 09106340
• HANDLE: 2115/72335
• NDL BIB ID: 029332042
• PubMed: 30078814
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029332042
• Web Site: https://link.springer.com/content/pdf/10.2116/analsci.18P147.pdf
• Web Site: https://link.springer.com/article/10.2116/analsci.18P147/fulltext.html
• Web Site: https://www.jstage.jst.go.jp/article/analsci/34/11/34_18P147/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed