Evaluation of the antibiofilm activity of three seaweed species and their biosynthesized iron oxide nanoparticles (Fe 3O 4-NPs)

摘要

Three samples of iron oxide nanoparticles (Fe3O4-NPs) were successfully synthesized usingSargassum vulgare,Ulva fasciataandJania rubensaqueous extract for reducing ferric chloride and stabilizing the formed Fe3O4-NPs. The biosynthesized Fe3O4-NPs were characterized using the standard methods. The antibiofilm activity of the selected seaweed and their biosynthesized Fe3O4-NPs against marine bacterial biofilm was examinedin vitro. Fe3O4-NPs showed better antibiofilm efficiency than the tested seaweed themselves for both steel and wood treatments. The best treatment was Fe3O4-NPs synthesized byS. vulgarefollowed by that synthesized byJ. rubensandU. fasciata.With respect to the tested seaweed,J. rubensshowed the highest antibiofilm activity followed byS. vulgareandU. fasciata. The effect of bacterial biofilm formed on the unprimed steel and wood coated panels on the chemical parameters of the contacted seawater was also studied.