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Peer-reviewedCC BY 4.0Frontiers in Microbiology

Manganese(II) oxidation by Bacillus wiedmannii DX3 isolated from electrolytic manganese residue: Mn(III) as an intermediate and characterisation of biogenic manganese oxides

  • Kai Zhong1
  • Qian Zhang1
  • Siting Lu2
  • Juanjuan Yin2
  • Yan Liao2
  • Minghua Gu1
  • Chaolan Zhang1
  1. 1College of Agriculture, Guangxi University
  2. 2School of Resource, Environment, and Materials, Guangxi University
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Abstract

Manganese contamination in soil poses risks to plant growth and human health. In this study, we isolated the manganese-oxidising bacterium Bacillus wiedmannii DX3 from electrolytic manganese residue and investigated its Mn(II) oxidation characteristics. The strain exhibited efficient Mn(II) oxidation at different initial Mn(II) concentrations, with a maximum biogenic manganese oxide (BMO) production of 166.89 μM achieved at 5.0 mM Mn(II). Spectroscopic analysis revealed that Mn(III) serves as a key intermediate during microbial Mn(II) oxidation. The biogenic manganese oxides were further characterised using transmission electron microscopy (TEM), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS), providing insights into their structural and functional properties. Overall, this study expands our understanding of manganese-oxidising bacteria and provides a mechanistic basis for the potential application of strain DX3 in the bioremediation of manganese-contaminated environments. The biogenic manganese oxides produced through the Mn(II) → Mn(III) → Mn(IV) pathway act as adsorbents for toxic metals and as oxidants for redox-sensitive contaminants. However, their efficacy in real soil and water matrices, as well as the biosafety of this B. wiedmannii strain, requires further evaluation.

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Cite

BibTeXRIS
BibTeX
@article{zhong2026manganeseii,
  title = {{Manganese(II) oxidation by Bacillus wiedmannii DX3 isolated from electrolytic manganese residue: Mn(III) as an intermediate and characterisation of biogenic manganese oxides}},
  author = {Kai Zhong and Qian Zhang and Siting Lu and Juanjuan Yin and Yan Liao and Minghua Gu and Chaolan Zhang},
  journal = {Frontiers in Microbiology},
  year = {2026},
  month = oct,
  doi = {10.3389/fmicb.2026.1910017},
  url = {https://www.frontiersin.org/articles/10.3389/fmicb.2026.1910017/full},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Manganese(II) oxidation by Bacillus wiedmannii DX3 isolated from electrolytic manganese residue: Mn(III) as an intermediate and characterisation of biogenic manganese oxides
AU  - Kai Zhong
AU  - Qian Zhang
AU  - Siting Lu
AU  - Juanjuan Yin
AU  - Yan Liao
AU  - Minghua Gu
AU  - Chaolan Zhang
PY  - 2026
DA  - 2026/10/13
JO  - Frontiers in Microbiology
DO  - 10.3389/fmicb.2026.1910017
UR  - https://www.frontiersin.org/articles/10.3389/fmicb.2026.1910017/full
AB  - Manganese contamination in soil poses risks to plant growth and human health. In this study, we isolated the manganese-oxidising bacterium Bacillus wiedmannii DX3 from electrolytic manganese residue and investigated its Mn(II) oxidation characteristics. The strain exhibited efficient Mn(II) oxidation at different initial Mn(II) concentrations, with a maximum biogenic manganese oxide (BMO) production of 166.89 μM achieved at 5.0 mM Mn(II). Spectroscopic analysis revealed that Mn(III) serves as a key intermediate during microbial Mn(II) oxidation. The biogenic manganese oxides were further characterised using transmission electron microscopy (TEM), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS), providing insights into their structural and functional properties. Overall, this study expands our understanding of manganese-oxidising bacteria and provides a mechanistic basis for the potential application of strain DX3 in the bioremediation of manganese-contaminated environments. The biogenic manganese oxides produced through the Mn(II) → Mn(III) → Mn(IV) pathway act as adsorbents for toxic metals and as oxidants for redox-sensitive contaminants. However, their efficacy in real soil and water matrices, as well as the biosafety of this B. wiedmannii strain, requires further evaluation.
SN  - 1664-302X
ER  -