Microbial diversity at remediated former gold and copper mines and the metal tolerance of indigenous microbial strains
- Author: mycolabadmin
- 8/29/2025
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Summary
This research examined microorganisms living in abandoned gold and copper mines in the Czech Republic to understand how they survive in toxic, metal-rich environments. Scientists identified bacteria and fungi that can tolerate high concentrations of heavy metals and other contaminants. These microorganisms could potentially be used to clean up polluted mine water naturally, offering a sustainable alternative to traditional treatment methods.
Background
Former mining sites at Zlaté Hory in the Czech Republic contain non-vein polymetallic, copper, and gold deposits. Sulfide leaching from previous mining activities has caused significant environmental alterations affecting local microbial communities and biogeochemical processes.
Objective
To characterize microbial diversity and community composition in remediated former gold and copper mines, including water, tailings, sediments, and treated mine water. To isolate and evaluate metal-tolerant bacteria and fungi as potential candidates for bioremediation of mine wastewater.
Results
Bacterial communities were dominated by Pseudomonadota, with acidotolerant consortia (Gallionella and Ferrovum) in acidic mine waters and metal-tolerant heterotrophs in treated waters. Highest microbial diversity observed in drainage water with low metal content. Thirty bacterial and 10 fungal isolates exhibited significant tolerance to multiple heavy metals, with lead and selenium most widely tolerated.
Conclusion
Physicochemical factors including pH and metal concentration shape environmental microbiomes. Indigenous metal-tolerant microorganisms such as Variovorax and Arthrobacter isolates show promise for bioremediation, potentially enhancing natural remediation processes already occurring at the site.
- Published in:Applied and Environmental Microbiology,
- Study Type:Observational Study,
- Source: 10.1128/aem.02555-24, 40879367