Abstract
The permselective characteristics of monovalent cation permselective membrane were evaluated, and the following results were obtained.
1) The relative transport number is slightly dependent on the salt concentration.
2) The concentration ratio of monovalent cations to total cations in the brine increases with increasing the current density and lowering the feed seawater temperature.
3) The decrease in ratio of sodium chloride in the brine is 1.0% for three years.
