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Bioremediation potential of consortium Pseudomonas Stutzeri LBR and Cupriavidus Metallidurans LBJ in soil polluted by lead

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  • Sirine Ridene
  • Naima Werfelli
  • Ahlem Mansouri
  • Ahmed Landoulsi
  • Chiraz Abbes

Abstract

Pollution by lead (Pb) is an environmental and health threat due to the severity of its toxicity. Microbial bioremediation is an eco-friendly technique used to remediate contaminated soils. This present study was used to evaluate the effect of two bacterial strains isolated and identified from Bizerte lagoon: Cupriavidus metallidurans LBJ (C. metallidurans LBJ) and Pseudomonas stutzeri LBR (P. stutzeri LBR) on the rate of depollution of soil contaminated with Pb from Tunisia. To determine this effect, sterile and non-sterile soil was bioaugmented by P. stutzeri LBR and C. metallidurans LBJ strains individually and in a mixture for 25 days at 30°C. Results showed that the bioaugmentation of the non-sterile soil by the mixture of P. stutzeri LBR and C. metallidurans LBJ strains gave the best rate of reduction of Pb of 71.02%, compared to a rate of 58.07% and 46.47% respectively for bioaugmentation by the bacterial strains individually. In the case of the sterile soil, results showed that the reduction rate of lead was in the order of 66.96% in the case of the mixture of the two bacterial strains compared with 55.66% and 41.86% respectively for the addition of the two strains individually. These results are confirmed by analysis of the leachate from the sterile and non-sterile soil which showed an increase in the mobility and bioavailability of Pb in soil. These promising results offer another perspective for a soil bioremediation bioprocess applying bacterial bioremediation.

Suggested Citation

  • Sirine Ridene & Naima Werfelli & Ahlem Mansouri & Ahmed Landoulsi & Chiraz Abbes, 2023. "Bioremediation potential of consortium Pseudomonas Stutzeri LBR and Cupriavidus Metallidurans LBJ in soil polluted by lead," PLOS ONE, Public Library of Science, vol. 18(6), pages 1-15, June.
    • Handle: RePEc:plo:pone00:0284120
    DOI: 10.1371/journal.pone.0284120
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    1. Carolina Coelho da Costa Waite & Guilherme Oliveira Andrade da Silva & José Augusto Pires Bitencourt & Luciana Pereira Torres Chequer & Simone Pennafirme & Diogo de Azevedo Jurelevicius & Lucy Seldin , 2020. "Potential application of Pseudomonas stutzeri W228 for removal of copper and lead from marine environments," PLOS ONE, Public Library of Science, vol. 15(10), pages 1-17, October.
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