Ion transport through a liquid membrane against a concentration gradient

Y. Marcus*, T. Nakashima

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The transport of potassium ions from mixed aqueous potassium and magnesium chloride solutions through an organic liquid membrane into water or a pure aqueous magnesium chloride solution at the same water activity was studied as a function of time and the initial potassium chloride concentration. The liquid membrane contained a crown ether (dibenzo-18-crown-6), a chloride ion solvating agent (m-cresol), and a diluent (p-nonylphenol) and was practically impermeable to magnesium ions. When the potassium chloride transferred into water it built up a concentration in one case more than four times that in the original mixed electrolyte solution. Concurrently, water was transferred in the opposite direction until the whole aqueous potassium chloride solution was absorbed in the mixed salt solution. The mechanisms and driving forces for the salt and water transport are discussed.

Original languageEnglish
Pages (from-to)794-797
Number of pages4
JournalJournal of Physical Chemistry
Volume87
Issue number5
DOIs
StatePublished - 1983

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