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

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Bibliographic Details
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

Description
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]
ISSN:	00265187