The investigation described in this article examined an oligodynamic water disinfection method employing metal ions (Ag+, Cu2+, Au) generated by an electrolytic process. The efficacy of using different silver/copper/gold combinations (within the limits of current drinking water regulations) for killing E. coli, Legionella pneumophila, Salmonella and other pathogens was examined. The study investigated the dependence of bacterial killing time against metal ion concentration, different initial bacteria concentrations (from 103 to 1012 CFU l−1), and the influence of different ion (Cl, SO2−4, S2−, Fe2+, Fe3+) concentrations on the disinfection process.

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