[en] Development of the Combined Electrolysis Catalytic Exchange (CECE) process for containment and recovery of tritium from aqueous streams has focused on (a) effects of tritium exposure on electrolysis cell operation, (b) effects of tritium exposure on hydrophobic exchange catalyst, and (c) operation of a pilot CECE unit. It has been demonstrated that both the electrolysis cells and the exchange catalyst are able to withstand the process conditions under which CECE operates. Also, data gathered from the operation of the pilot CECE unit has been found to agree with earlier bench scale data from the Chalk River Nuclear Laboratory operated by the Atomic Energy of Canada, Limited