A New Method for the Deposition of Metallic Silver on Porous Ceramic Water Filters
(a) Average log change of E. coli, Log (C/C0), versus pore volume of flow with a long-term constant exposure to E. coli by silver application method. Trend lines show the change in performance of E. coli removal over time. The slope of the trend line for the silver nanoparticle filters 0.0027 shows a decrease in performance. While the silver nitrate filter trend line has a slope of −0.0005, meaning at least consistent performance. (b) Total silver concentration in effluent from silver-ceramic filter media as a function of pore volumes of flow with a long-term constant exposure to E. coli. Data are for two filter types with varying silver application methods and amounts.