Apparatus and method for removal of ions

A method to remove ions, the method comprising:

• applying an electrical potential difference between at least two master electrodes in a housing, the housing having an inlet, an outlet and at least one floating electrode located between at least two adjacent master electrodes;
• allowing water to flow from the inlet to the outlet between at least two adjacent electrodes;
• preventing anions from moving from an anode side of the at least one floating electrode to a cathode side of the at least one floating electrode and cations from moving from the cathode side to the anode side;
• and
• removing ions in the water by attracting ions to the master and floating electrodes by the potential difference.

A method to remove ions, the method comprising:

• applying an electrical potential difference between at least two master electrodes in a housing, the housing comprising an inlet, an outlet and at least floating electrode located between at least two master electrodes;
• limiting ions from moving from an anode side of the at least floating electrode to a cathode side of the at least one floating electrode, or vice versa, by using a thin layer of insulating material disposed to an edge of the at least one floating electrode, the thin layer extending in a longitudinal direction of the at least one floating electrode;
• and
• allowing water to flow from the inlet to the outlet between at least two adjacent electrodes.