Deionizers using the electrode configurations of electrochemical capacitors are described, wherein the deionizing process is called capacitive deionization (CDI). During deionization, a DC electric field is applied to the cells and ions are adsorbed on the electrodes with a potential being developed...http://www.google.fr/patents/US6661643?utm_source=gb-gplus-shareBrevet US6661643 - Deionizers with energy recovery
