Fig. 6From: Construction of a domestic wastewater disinfection filter from biosynthesized and commercial nanosilver: a comparative studyReduction percentage of total coliform of wastewater using two different substrates loaded with Ag NPs in column experiment after 6 h compared to unloaded control (a). Reduction percentage of total coliform of wastewater using two different disinfection modes of Ag NPs loaded limestone gravel column after 6 h in comparison to unloaded control (b). Error bar indicates standard deviationBack to article page