Fig. 10

Comparison of E. coli colony counts under dark (D) and light (L) exposure in blank solution and solutions containing iron oxide nanoparticles (magnetite and hematite) synthesized using Guava (Gv) and Moringa leaf (Mo) extracts, calcined at 300 °C (Gv3, Mo3) and 600 °C (Gv6, Mo6).