Cherif A T, Gavach C, Molenat J, Elmidaoui A
Laboratoire des Matériaux et Procédés Membranaires CNRS, 1919 route de Mende, F34293, Montpellier, Cedex 5, France.
Talanta. 1998 Aug;46(6):1605-11. doi: 10.1016/s0039-9140(97)00394-9.
Donnan Dialysis of Ag(+) and Zn(2+) was investigated through a cation exchange membrane (CMS Neosepta) when a proton concentration difference was maintained between the two sides of the membrane. Developed for the production of brine from sea water, CMS Neosepta showed a higher permeability to monovalent than to bivalent cations. Several physico-chemical parameters have been determined (electrical resistance, membrane potential, sorption of electrolytes, Zn(2+) and Ag(+) diffusion coefficients). The flux of Ag(+) and the diffusion potential in the membrane increase with HNO(3) concentrations. Ag(+) and Zn(2+) can be separated because of the preferential membrane transfer for Ag(+).
当在膜的两侧维持质子浓度差时，通过阳离子交换膜（CMS Neosepta）研究了Ag(+)和Zn(2+)的唐南透析。CMS Neosepta是为从海水中生产盐水而开发的，它对单价阳离子的渗透性高于对二价阳离子的渗透性。已经测定了几个物理化学参数（电阻、膜电位、电解质吸附、Zn(2+)和Ag(+)扩散系数）。Ag(+)的通量和膜中的扩散电位随HNO(3)浓度的增加而增加。由于膜对Ag(+)的优先转移，Ag(+)和Zn(2+)可以被分离。
