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Reductive bioleaching of goethite-rich and hematite-rich iron tailings by anaerobic organisms.

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Title: Reductive bioleaching of goethite-rich and hematite-rich iron tailings by anaerobic organisms.
Authors: Borkar, Palas Kamlakar1 pkborkar@mtu.edu, Sharma, Neha1, Boafo, Kwabena1, Amponsah-Berko, Daniel1, Eisele, Timothy1
Source: Mining Engineering. Mar2026, Vol. 78 Issue 3, p38-40. 3p.
Subject Terms: *Goethite, *Hematite, *Anaerobic microorganisms, *Bacterial leaching, *Ores, *Biochemical substrates, *Iron mining, *Iron ores
Abstract: Iron extraction from low-grade ores and tailings is increasingly constrained by high energy consumption and production costs. This study demonstrates that reductive bioleaching, driven by anaerobic iron-reducing microorganisms and biomass-derived organic substrates, can effectively dissolve iron from both goethite-rich and hematite-rich iron tailings under mild conditions. While goethite dissolves more rapidly, prolonged microbial activity enables sustained dissolution of hematite, a mineral traditionally considered refractory to bioleaching. These findings highlight the potential of biologically mediated iron recovery as a low-energy, environmentally responsible alternative for upgrading iron tailings and low-grade resources. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 191686431
AccessLevel: 6
PubType: Periodical
PubTypeId: serialPeriodical
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Reductive bioleaching of goethite-rich and hematite-rich iron tailings by anaerobic organisms.
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  Data: <searchLink fieldCode="AR" term="%22Borkar%2C+Palas+Kamlakar%22">Borkar, Palas Kamlakar</searchLink><relatesTo>1</relatesTo><i> pkborkar@mtu.edu</i><br /><searchLink fieldCode="AR" term="%22Sharma%2C+Neha%22">Sharma, Neha</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Boafo%2C+Kwabena%22">Boafo, Kwabena</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Amponsah-Berko%2C+Daniel%22">Amponsah-Berko, Daniel</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Eisele%2C+Timothy%22">Eisele, Timothy</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Mining+Engineering%22">Mining Engineering</searchLink>. Mar2026, Vol. 78 Issue 3, p38-40. 3p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Goethite%22">Goethite</searchLink><br />*<searchLink fieldCode="DE" term="%22Hematite%22">Hematite</searchLink><br />*<searchLink fieldCode="DE" term="%22Anaerobic+microorganisms%22">Anaerobic microorganisms</searchLink><br />*<searchLink fieldCode="DE" term="%22Bacterial+leaching%22">Bacterial leaching</searchLink><br />*<searchLink fieldCode="DE" term="%22Ores%22">Ores</searchLink><br />*<searchLink fieldCode="DE" term="%22Biochemical+substrates%22">Biochemical substrates</searchLink><br />*<searchLink fieldCode="DE" term="%22Iron+mining%22">Iron mining</searchLink><br />*<searchLink fieldCode="DE" term="%22Iron+ores%22">Iron ores</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Iron extraction from low-grade ores and tailings is increasingly constrained by high energy consumption and production costs. This study demonstrates that reductive bioleaching, driven by anaerobic iron-reducing microorganisms and biomass-derived organic substrates, can effectively dissolve iron from both goethite-rich and hematite-rich iron tailings under mild conditions. While goethite dissolves more rapidly, prolonged microbial activity enables sustained dissolution of hematite, a mineral traditionally considered refractory to bioleaching. These findings highlight the potential of biologically mediated iron recovery as a low-energy, environmentally responsible alternative for upgrading iron tailings and low-grade resources. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=191686431
RecordInfo BibRecord:
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    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 3
        StartPage: 38
    Subjects:
      – SubjectFull: Goethite
        Type: general
      – SubjectFull: Hematite
        Type: general
      – SubjectFull: Anaerobic microorganisms
        Type: general
      – SubjectFull: Bacterial leaching
        Type: general
      – SubjectFull: Ores
        Type: general
      – SubjectFull: Biochemical substrates
        Type: general
      – SubjectFull: Iron mining
        Type: general
      – SubjectFull: Iron ores
        Type: general
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      – TitleFull: Reductive bioleaching of goethite-rich and hematite-rich iron tailings by anaerobic organisms.
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            NameFull: Borkar, Palas Kamlakar
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            NameFull: Sharma, Neha
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            NameFull: Amponsah-Berko, Daniel
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            NameFull: Eisele, Timothy
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            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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              Value: 78
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            – TitleFull: Mining Engineering
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