| abstract |
(57) [Object] To provide an electrodeionization method for preventing scale formation, which does not require complicated piping, valves, pump systems, and control systems. SOLUTION: An impure aqueous liquid is separated by an anion and cation permeable membrane and flows through an ion emitting compartment containing an ion exchange resin bead and water receiving ionic species is separated by an anion and cation permeable membrane. In a liquid purification method in which ionic species are removed in an electrodeionization apparatus that flows through an ion-concentrating compartment and simultaneously applies a voltage between a cathode compartment and an anode compartment on both sides, electron conducting particles (carbon , Metal particles). Cathode compartment 10 Includes a cathode plate member 12, a power supply connection portion 14, an ion permeable film 16, and a conductive material 18. The conductive material provides increased effective cathode surface area and reduces local hydroxide concentration at the cathode surface. |