Investigating the possibility of bioabsorption along with the production of lead and tellurite nanoparticles by Shinella Zoogloeoides DSM287 bacteria

Reiisi, Somayeh; Taheri, Behdad; Mobini Dehkordi, Mohsen; Banimahdi, Farhad; Taji, Fatemeh

doi:10.48311/biot.2025.27533

Investigating the possibility of bioabsorption along with the production of lead and tellurite nanoparticles by Shinella Zoogloeoides DSM287 bacteria

Document Type : Original Research

Authors

Somayeh Reiisi

Behdad Taheri

Mohsen Mobini Dehkordi

Farhad Banimahdi

Fatemeh Taji

Department of Genetics, Faculty of Basic Sciences, Shahrekord University, Shahrekord, Iran

https://doi.org/10.48311/biot.2025.27533

Abstract

Non-biodegradable metals exhibit toxicity to living organisms at high concentrations. They enter aquatic systems through various pathways, including industrial activities, often in an uncontrolled manner. Given the role of bacteria as effective biosorbents, they can be employed for the removal of heavy metals from industrial wastewater. The aim of this study was to investigate the biosorption of lead and tellurite by Shinella zoogloeoides-DSM287 and assess its potential for nanoparticle biosynthesis.
In this study, the biosorption of lead and tellurite was evaluated under various conditions, including different pH levels, temperatures, initial metal concentrations, and incubation times. Subsequently, the potential formation of nanoparticles during the biosorption process was investigated, and the presence of nanoparticles was confirmed using various analytical techniques. According to the results, Shinella zoogloeoides-DSM287 exhibited resistance to lead and tellurite, with MICs of 2400 µg/mL and 100 µg/mL, respectively. Furthermore, the bacterium acted as an efficient biosorbent for lead and tellurite ions under alkaline conditions, at temperatures between 28–32â¯°C, and across different incubation periods. Additionally, the bacterium was able to convert tellurite ions into tellurium nanoparticles during the biosorption process. DLS and zeta potential analyses revealed that the biosynthesized nanoparticles had an average size of approximately 150 nm and a surface charge of −34 mV. Transmission Electron Microscopy (TEM) showed the nanoparticles to be irregularly spherical in shape. In summary, the studied bacterium demonstrated a potential for the biosorption of lead and tellurite and could be considered a promising candidate for the removal of these contaminants from aquatic environments.

Keywords

Shinella zoogloeoides

toxic metals

lead

tellurium

nanoparticles

Subjects

Microbial biotechnology

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