Roles of microbial activity and anthraquinone-2,7-disulfonate as a model of humic substances in leaching of iron from hematite into seawater

Apichaya Aneksampant; Atsushi Tanaka; Xuefei Tu; Hisanori Iwai; Mitsuo Yamamoto; Kazunori Nakashima; Masami Fukushima

doi:10.2116/analsci.18P147

Roles of microbial activity and anthraquinone-2,7-disulfonate as a model of humic substances in leaching of iron from hematite into seawater

Apichaya Aneksampant, Atsushi Tanaka, Xuefei Tu, Hisanori Iwai, Mitsuo Yamamoto, Kazunori Nakashima^*, Masami Fukushima

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

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 Fe ₂ O ₃ (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 Fe ₂ O ₃ into seawater. Anthraquinone-2,7- disulfonate (AQDS), which can play as an electron acceptor/donor between microbe and insoluble Fe ₂ O ₃ particles, enhanced the effect of iron bio-leaching.

Original language	English
Pages (from-to)	1303-1308
Number of pages	6
Journal	Analytical Sciences
Volume	34
Issue number	11
DOIs	https://doi.org/10.2116/analsci.18P147
Publication status	Published - 2018
Externally published	Yes

Keywords

7-disulfonate
Anthraquinone-2
Barren ground
Exiguobacterium oxidotolerans sp.
Hematite
Iron elution
Iron reduction
Seawater

ASJC Scopus subject areas

Analytical Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.2116/analsci.18P147

Cite this

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title = "Roles of microbial activity and anthraquinone-2,7-disulfonate as a model of humic substances in leaching of iron from hematite into seawater",

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 Fe 2 O 3 (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 Fe 2 O 3 into seawater. Anthraquinone-2,7- disulfonate (AQDS), which can play as an electron acceptor/donor between microbe and insoluble Fe 2 O 3 particles, enhanced the effect of iron bio-leaching.",

keywords = "7-disulfonate, Anthraquinone-2, Barren ground, Exiguobacterium oxidotolerans sp., Hematite, Iron elution, Iron reduction, Seawater",

author = "Apichaya Aneksampant and Atsushi Tanaka and Xuefei Tu and Hisanori Iwai and Mitsuo Yamamoto and Kazunori Nakashima and Masami Fukushima",

note = "Funding Information: This research was supported by JSPS KAKENHI grant Numbers 24686100 and 16H02985. Publisher Copyright: {\textcopyright} The Japan Society for Analytical Chemistry 2018.",

year = "2018",

doi = "10.2116/analsci.18P147",

language = "English",

volume = "34",

pages = "1303--1308",

journal = "Analytical Sciences",

issn = "0910-6340",

publisher = "Japan Society for Analytical Chemistry",

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TY - JOUR

T1 - Roles of microbial activity and anthraquinone-2,7-disulfonate as a model of humic substances in leaching of iron from hematite into seawater

AU - Aneksampant, Apichaya

AU - Tanaka, Atsushi

AU - Tu, Xuefei

AU - Iwai, Hisanori

AU - Yamamoto, Mitsuo

AU - Nakashima, Kazunori

AU - Fukushima, Masami

N1 - Funding Information: This research was supported by JSPS KAKENHI grant Numbers 24686100 and 16H02985. Publisher Copyright: © The Japan Society for Analytical Chemistry 2018.

PY - 2018

Y1 - 2018

N2 - 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 Fe 2 O 3 (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 Fe 2 O 3 into seawater. Anthraquinone-2,7- disulfonate (AQDS), which can play as an electron acceptor/donor between microbe and insoluble Fe 2 O 3 particles, enhanced the effect of iron bio-leaching.

AB - 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 Fe 2 O 3 (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 Fe 2 O 3 into seawater. Anthraquinone-2,7- disulfonate (AQDS), which can play as an electron acceptor/donor between microbe and insoluble Fe 2 O 3 particles, enhanced the effect of iron bio-leaching.

KW - 7-disulfonate

KW - Anthraquinone-2

KW - Barren ground

KW - Exiguobacterium oxidotolerans sp.

KW - Hematite

KW - Iron elution

KW - Iron reduction

KW - Seawater

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ER -

Roles of microbial activity and anthraquinone-2,7-disulfonate as a model of humic substances in leaching of iron from hematite into seawater

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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