Transport Characteristics of Co²⁺ Through an Ion Exchange Textile in a Continuous Electrodeionization (CEDI) System Under Electro‐Regeneration

Abstract

The transport of cobalt ion in a continuous electrodeionization (CEDI) system was investigated in terms of electrochemical properties of ion exchange textile. The porous plug model and an extended Nernst‐Plank equation were applied to describe the transport of Co²⁺ through an ion exchange textile. The transport characteristics of Co²⁺ during CEDI operation suggested the transport mechanism was due mainly to the increased current induced by the high conductivity in the ion exchange textile, not accelerated ionic mobility. This study suggested the important parameter for the high performance of the CEDI system is the conductivity of the ion exchange media.

Keywords:

• Continuous electrode ionization
• Electroregeneration
• Porous plug model

Acknowledgments

The authors gratefully acknowledge the Basic Atomic Energy Research Institute (BAERI) program at the Korea Institute of Science and Technology Evaluation and Planning (KISTEP) for the financial support to carry out this work.