Abstract
Using efficient and environmentally friendly techniques for the remediation of heavy metals contaminated soils plays a vital role in sustainable agriculture and public health. This study was conducted to assess the efficacy of biosurfactant-producing bacteria to remove Pb from a contaminated soil in the Agriculture Faculty of Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran, in 2019–2020 as a completely randomized design with three replications. The studied treatments were bacterial strain, biosurfactant, and control. Three native strains of bacteria (Bacillus pumilus, Alcanivorax dieselolei, Marinobacter hydrocarbonoclasticus) were used in this study. Considering the minimum inhibitory concentration (MIC) of Pb, Marinobacter hydrocarbonoclasticus was selected as the superior strain with respect to resistance to Pb. In order to evaluate the production capacity of biosurfactants in the superior strain, 4 tests (emulsification measurement, oil spreading, drop collapsing, and hemolytic activity) were used, which obviously approved the ability of this strain for biosurfactant production. Furthermore, the results of Pb detoxification by the treatments showed that the biosurfactant treatment had the greatest effect on the Pb removal from the soil compared to other treatments (27.37%), also there was no significant difference between the strain (i.e., Marinobacter hydrocarbonoclasticus) and control treatment. In general, it is concluded that using the abilities of soil bacteria and their metabolites, particularly in contaminated soils, will help researchers and stakeholders to improve soil and crop health and consequently public health, with low cost and high efficiency.
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ACKNOWLEDGMENTS
We would like to thank the Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran, for their sincere assistance in conducting this research.
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Ataei, A., Baharlouei, J. & Ataabadi, M. Removal of Lead (Pb) Using Microbial Biosurfactant from a Contaminated Soil. Eurasian Soil Sc. 55, 1930–1938 (2022). https://doi.org/10.1134/S1064229322601408
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DOI: https://doi.org/10.1134/S1064229322601408