Ion-exchange membrane

An ion-exchange membrane is a semi-permeable membrane that transports certain dissolved ions, while blocking other ions or neutral molecules.^[1]

Ion-exchange membranes are therefore electrically conductive. They are often used in desalination and chemical recovery applications, moving ions from one solution to another with little passage of water.^[2]

Important examples of ion-exchange membranes include the proton-exchange membranes, that transport H⁺
cations, and the anion exchange membranes used in certain alkaline fuel cells to transport OH⁻
anions.

^ Tanaka, Yoshinobu (January 2015). Ion exchange membranes: fundamentals and applications. Japan: Elsevier. p. 47. ISBN 978-0-444-63319-4.
^ Strathmann, Heiner (2004). Membrane Science and Technology Series, 9: Ion Exchange Membrane Separation Processes (First ed.). San Diego, Ca, USA: Elsevier. pp. 90–206. ISBN 0-444-50236-X.

[Yoshinobu-1] Tanaka, Yoshinobu (January 2015). Ion exchange membranes: fundamentals and applications. Japan: Elsevier. p. 47. ISBN 978-0-444-63319-4.

[Strathmann-2] Strathmann, Heiner (2004). Membrane Science and Technology Series, 9: Ion Exchange Membrane Separation Processes (First ed.). San Diego, Ca, USA: Elsevier. pp. 90–206. ISBN 0-444-50236-X.

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