An electrolytic device comprising a housing includes at least first and second adjacent liquid flow-through channels. A barrier impermeable to ion flow and to bulk liquid flow is disposed between the first and second channels. A first electrode assembly is disposed adjacent to one end of the channels and a second electrode assembly is disposed adjacent the other end of the channels.;Also, a contaminant removal method using the above electrolytic device. A first aqueous stream including contaminants flows through the first channel while passing a current between the first and second electrode assemblies to remove contaminants. Effluent from the first channel flows, with or without further treatment, through the second channel while passing current between said first and second electrode assemblies to remove further contaminants.
