M. Higa et al., IONIC TRANSPORT AGAINST ITS CONCENTRATION GRADIENT ACROSS BIPOLAR MEMBRANES, Journal of the Chemical Society. Faraday transactions (Print), 94(16), 1998, pp. 2429-2433
Citations number
45
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Countertransport of ions is defined as the transport of an ion against
its own concentration gradient driven by the third driving electrolyt
e added to the systems. The countertransport was simulated for K+ and
Ca2+ ions in dialysis systems that consist of two electrolyte solution
s divided by a bipolar membrane as a function of the mobility of the d
riving ions, the charge density and thickness of the negative and posi
tive components of the membrane. The simulations show that the counter
transport occurs in the direction either of or opposite to the concent
ration gradient of the driving electrolyte depending on the values of
the above parameters and on the bipolar direction, and that the direct
ion of the countertransport can alter in a run under certain condition
s. The permselectivity of the membrane for ionic valence depends on th
e bipolar direction.