Diffusion and selective transport of alkali cations in a polysulfone ion exchange membrane
[ X ]
Tarih
1995
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Gauthier-Villars
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
he diffusion of alkali metals through a charged polysulfonated ICE-450 ion exchange membrane has been measured as a function of pH and conservation of the external solution at 25 degrees C. The permeability and diffusion coefficients were found to increase in the sequence Cs(+)greater than or equal to K+>Na+>Li+ and with the external concentration. This sequence can be explained by considering the hydration of the ions in the membrane. The modes of membrane/solution distribution and the diffusion of cations as a controlling factor in the membrane permselectivity and hydration values of cations both correlated consistently with the flux data, as well as with the estimated membrane permselectivity parameters. The selective transport of K/Na and K/Li binary systems at various pH gradients through the membrane was also investigated under various conditions. The selectivity depended on both the hydrated ionic size and the interaction between the fixed groups in the membrane and the metal ions. A good agreement was found between the observed diffusion coefficients and the selectivity values and the limiting mobility ratio in water.
Açıklama
Ersoz, Mustafa/0000-0002-9409-9157
Anahtar Kelimeler
Kaynak
New Journal Of Chemistry
WoS Q Değeri
N/A
Scopus Q Değeri
Cilt
19
Sayı
10
Künye
closedAccess
