Abstract
A study is made of a grafted carboxylic-polyethylene membrane. The transport numbers of sodium and potassium ions under a constant current are measured using the radiotracer technique, the membrane being in contact with two identical sodium hydroxide or potassium hydroxide solutions. The variation of the cation transport numbers with the external alkali concentration is related to the amount of sorbed molecules in the membrane phase. The difference in the mobility ratio between sodium ion and potassium ion under zero current and non-zero current conditions raises the question of the constancy of hydroxide ion mobility.
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