A decalcifying apparatus

A method of decalcifying an aqueous solution having a first operating condition for removing ions from aqueous solution and a second operating condition for regenerating the ions into aqueous solution, the first operating condition comprising:

• (a) introducing an aqueous solution, and,
• (b) applying a voltage between a first electrode arrangement;
• having a low potential, and a second electrode arrangement, having a high potential, in the aqueous solution to attract the ions to the electrode arrangements and remove the ions from the aqueous solution;
• the second operating condition in which an ion generating body is interposed between the first and second electrode arrangements to define a first cell and a second cell, each cell containing an oppositely charged first and second electrode arrangement, wherein the ion generating body is not electrically connected, the second operating condition comprising:
• (c) applying a voltage between the first and second electrode arrangements with the potentials reversed such that the first electrode arrangement has a high potential and the second electrode arrangement has a low potential to regenerate the ions removed from the aqueous solution in the first operating condition, and
• (d) removing the resulting waste aqueous solution from the electrolytic cell section,
• wherein the first electrode arrangement comprises a first electrosorption electrode and wherein the second electrode arrangement comprises a second electrosorption electrode.