ELECTRODIALYSIS REVERSAL (EDR) is an electrodialysis reversal water desalination membrane process that has been commercially used since the early 1960s. An electric current migrates dissolved salt ions , including fluorides , nitrates and sulfates , through an electrodialysis stack consisting of alternating layers of cationic and anionic ion exchange membranes. Periodically, the direction of ion flow is reversed by reversing the polarity of the applied electric current.
* ^ A B Katz, William E. (January 1979). "The electrodialysis reversal (EDR) process". Desalination. 28 (1): 31–40. doi :10.1016/S0011-9164(00)88124-2 . Retrieved 2015. Check date values in: access-date= (help