Analysis of interactions between Bacillus species and heavy metals in soil
DOI:
https://doi.org/10.3846/da.2026.1702Language:
LithuanianAbstract
Heavy metal contamination adversely affects eco systems due to the persistence of these pollutants and their ability to disrupt soil microorganism balance. Bacillus sp. exhibit resistance to heavy metal stress and possess the capacity to participate in various bioremediation processes due to spore formation, metabolic plasticity, and effective surface interactions with metal ions. This study aimed to investigate the interaction between Bacillus J4 sp., cadmium, lead and copper ions in soil and to evaluate possible immobilization mechanisms. The methodology was based on experimental research examining the influence of Bacillus sp. on heavy metal mobility using FTIR analysis. The bioremediation process was assessed through changes in heavy metal forms and availability. FTIR spectroscopy analysis revealed changes in absorption bands in the <700 cm–¹ and ~1000–1050 cm–¹ wavenumber regions, which are associated with the formation of metal oxygen (Me–O) and C–O/P–O bonds. As the concentration of Bacillus J4 sp. increased (1.28×10¹¹ – 3.2×10¹¹ CFU), a de crease in the intensity of Me–O bonds was observed, indicating possible biosorption of heavy metals and a reduction in their mobility in soil. The obtained results suggest that Bacillus sp. may participate in heavy metal stabilization processes and contribute to soil bioremediation.
Article in Lithuanian
Keywords:
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