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Article History

Received: 23 April 2024

Accepted: 13 August 2024

First Online: 13 September 2024

Conclusions

: The bacterium <i>B. pumilus</i> OR431753 can be used for the biosynthesis of extracellular SeNPs by reducing selenium ions with the potential to improve selenium nanoparticle production by controlling culture conditions (carbon source, pH, and temperature). The antimicrobial properties and adsorption ability of both biosynthesized SeNPs and nanochitosan can be exploited as a biofilter to remove some metal and nano-pollutants and reduce microbial contamination of water and wastewater. The resulting SeNPs/NCh nanocomposite has proven its efficiency as a filter for treating water or wastewater contaminated with mercury residues or AgNPs (with up to 99% efficiency for each). The positive results obtained require further studies on the long-term stability and efficiency of biosynthesized SeNPs/NCh nanocomposites as a candidate for several environmental pollutants.

: The authors declare no competing interests.