This research explores the antimicrobial efficacy and ecological impact of biologically synthesized silver nanoparticles (AgNPs) produced by the fungus Aspergillus niger (specifically, strain IBCLP20). The study assessed the effects of these nanoparticles on three freshwater species—Chlorella vulgaris, Daphnia similis, and Danio rerio (zebrafish). Results showed that AgNPs produced by strain IBCLP20 possess significant antimicrobial properties against bacteria and fungi, which hold promise for various applications but also cause adverse effects on the tested organisms.
The paper provides context by discussing the use of nanomaterials across various industries and emphasizes the ecological footprint of nanoparticle production. It highlights the environmental concerns associated with synthetic nanoparticles and the potential advantages of biogenic nanoparticles, which are deemed safer and less toxic due to their biological synthesis process.
While the study underscores the biocidal properties of mycogenic AgNPs, it also reveals their potential ecotoxicological risks. The findings stress the need for further research to establish safe concentration thresholds. As nanoparticles find an ever-expanding range of applications across different industries, addressing their environmental impact becomes increasingly urgent.
da Silva, C. A., Ribeiro, B. M., do Valle Trotta, C., Perina, F. C., Martins, R., de Souza Abessa, D. M., … Simões, M. F. & Ottoni, C. A. (2022). Effects of mycogenic silver nanoparticles on organisms of different trophic levels. Chemosphere, 308, 136540, doi: 10.1016/j.chemosphere.2022.136540.
