Studies on syntheses and permeabilities of special polymer membranes. XLVII. Active transport and selective transport of metal ions through membranes from poly(isobutylene-alternative co-maleic anhydride) and poly(vinyl alcohol)

✍ Scribed by Tadashi Uragami; Shizuharu Watanabe; Reiichi Nakamura; Fumihiko Yoshida; Mizuho Sugihara

• Publisher: John Wiley and Sons
• Year: 1983
• Tongue: English
• Weight: 594 KB
• Volume: 28
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1983.070280506

✦ Synopsis

When a cation exchange membrane having carboxyl groups, made of poly(isobuty1ene-alternative co-maleic anhydride) and poly(viny1 alcohol), was set in a diaphragm type cell, in which one side of the solution was adjusted to be acidic and the other side alkaline, metal ions were actively transported from the alkaline side to the acidic side across the membrane against the concentration gradient of metal ions between both sides. The driving force of the transport of metal ions was the difference in H+ ion concentration between both sides. It was presumed that the active transport was carried out chemically and physically. In the selective transport of metal ions, the selectivity was dependent on both the hydrated ionic radius for the metal ions and the affinity between the carrier fixed to the membrane, the carboxyl group, and the metal ions.