Deionized water highly contaminated with E.coli and containing sodium sulfate as an electrolyte was treated in a circulating system with the use of an electrochemical cell with electrodes made of stainless steel, copper, nickel and titanium. Pulsed electrical signals of low voltages (below 5 volts) and low current (below 0.25A) were used. The efficacy of disinfection process was found to be dependent on nature of electrode material and  proportional to both treatment time and concentration of hydroxyl radicals generated during electrolysis which was confirmed using N,N-dimethyl-p-nitrosoaniline as a spin trap. Recommendations how to increase the disinfection efficiency and decrease the time of treatment were discussed.

Chlorine-free electrochemical disinfection of water contaminated with Escherichia coli: Role of electrode materials

248th National Meeting (2014)

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