[en] A non-active 0.1 m³/h electrochemical ion-exchange (EIX) treatment plant has been successfully commissioned using 0.2 x 1 m electrodes fabricated from mixed Amberlite CG50/IRC84 by a mould route. At 50% design throughout, DFs of 20,000 were observed - falling to 2000 at 75%. At 0.1 m³/h, the DF was ∼ 200, though this decrease could have partly been caused by electrode deformation after 38h operation. Cell modification will prevent this in future. Small-scale tests have shown zirconium phosphate (ZrP) to have excellent EIX properties below pH 12, although above this hydrolysis occurs. However, under the polarity reversal conditions used for selectivity enhancement, this problem is negligible. An active 0.1 m³/h plant has now been built in the site effluent treatment centre to test ZrP electrodes for the treatment of active waste streams. A high capacity EIX system for plutonium removal has yet to be demonstrated. However, as a DF of 2 was observed at pH 1.5, followed by desorption on polarity reversal, there are indications that ZrP may be effective at pH > 4. Some adsorption has also been observed onto a high surface area Ti electrode at pH 3 (corresponding to 2.7 kBq/cm³), followed by complete desorption into 1M HNO₃ on polarity reversal. Improved performance is expected with further development. (author)