Fig. 6.

Toxicity of 12 nanoparticles to bacteria Escherichia coli and Staphylococcus aureus. Toxicity was evaluated by determining the colony-forming ability of the bacteria after exposure to nanoparticles in deionized water for 24 h at 25 °C. After exposure, 5 μl of bacterial suspension was transferred onto toxicant-free agarized LB growth medium. The concentrations of the NPs are in mg compound l⁻¹. All concentrations are nominal. *3,5 Dichlorophenol was used as a positive control, **Minimal biocidal concentration [65]