European centre of excellence
for sustainable water technology

Capacitive deionization

Capacitive deionization, or CDI, uses porous electrodes is a new promising technique to remove salt from water by reversibly adsorbing ions in selective electrodes. The electrodes can be made of porous activated carbon, or of an intercalation material. Ion-exchange membranes make the technology more efficient in energy and removal capacity. CDI can be used not just to desalinate water, but also to selectively remove one metal ion from a mixture of other ions of the same charge sign. Novel developments in CDI include the use of chemically modified carbon electrodes, application of flowing carbon slurries and fluidized beds, and the use of optimized charge/discharge schemes. Wetsus plays a prominent role in CDI research worldwide and is founder of the international working group on CDI, see In the theme the CDI-technology is further developed.

Maarten Biesheuvel

Theme coordinator
Maarten Biesheuvel

Industrial partners

Voltea logo + name
Logo Dow

Academic partners

Wageningen University 2016

Research projects

Tania Mubita, Wageningen University
   Capacitive Deionization with membranes for selective ion removal
Kaustub Singh, Wageningen University
   Advanced materials for electro-driven separation for selective resource recovery

combining scientific excellence with commercial relevance