Cadmium and lead removal by new bacterial isolates from coal and aluminum mines

  • A. Dabir
  • P. HeidariEmail author
  • H. Ghorbani
  • A. Ebrahimi
Original Paper


Heavy metals such as cadmium have dangerous effects on ecosystem and human health. In this study, the bacteria diversity of soil samples of coal, salt and aluminum mines and water sample of Mareh wetland of Iran were investigated and their potential to cadmium removal was assessed. Based on partial sequencing of 16S region, the 64 isolates were identified that water sample of Mareh wetland showed high bacterial diversity. Among the isolated bacterial, 11 isolates from 10 different genus including Leifsonia sp., Rhodococcus sp., Bacillus sp., Microbacterium sp., Enterobacter sp., Planomicrobium sp., Microbacterium sp., Thalassospira sp., Brevundimonas sp., Halomonas sp. and Micrococcaceae sp. (could grow under 50 mg/L CdCl2) were selected to consider the cadmium bioremediation potential. The Microbacterium oxydans CM3 and Rhodococcus sp. AM1 as new strains exhibited high ability to removal of cadmium and also degraded 58 and 39% of 400 mg/L lead after 72 h of incubation, respectively. Our result revealed that M. oxydans strain CM3 as natural way has a great potential for absorbing and degrading the heavy metal such as cadmium and lead.


Heavy metals Bacterial Rhodococcus sp. Bacillus sp. Leifsonia sp. M. oxydans Bioremediation 



The authors appreciate the Shahrood University of Technology for providing financial and facilities to carry out this research work.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Islamic Azad University (IAU) 2019

Authors and Affiliations

  1. 1.Water and Soil Department, Faculty of AgricultureShahrood University of TechnologyShahroodIran
  2. 2.Department of Agronomy and Plant Breeding, Faculty of AgricultureShahrood University of TechnologyShahroodIran

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