Abstract
Recent work has shown that a new material system composed of iron oxide (Fe 2O 3) nanoparticles loaded onto a fiberglass support displays excellent antiviral properties against the model virus, MS2 phage, but is ineffective against bacteria, specifically Escherichia coli ( E. coli). To increase the antibacterial properties and still maintain antiviral activity, silver (Ag) nanoparticles were added to this system through an aqueous hydrothermal reduction process with 0.25 M silver nitrate (AgNO 3). A 0.05 mg/mL loading of the new Ag modified oligodynamic nanoparticle impregnated fiberglass system consisting of Fe 2O 3 (9.1 wt.%) and Ag (0.1 wt.%)/g-fiber, displayed robust antibacterial activity by achieving a 2 log removal of 10 6 CFU/mL E. coli in 1 min. The inactivation rate of the Ag-modified Fe 2O 3 impregnated fiberglass (FG-Fe 2O 3/Ag) system was comparable to previously reported Ag nanoparticle impregnated fiberglass. The FG-Fe 2O 3/Ag displayed excellent dynamic performance, effectively eliminating 10 6 E. coli CFU /mL with no bacterial breakthrough up to 250 bed volumes.
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