Slezak Izabella H, Jasik-Slezak Jolanta, Rogal Mirosława, Slezak Andrzej
Zakład Biologii i Biofizyki Politechniki Czestochowskiej, Czestochowa.
Polim Med. 2006;36(2):33-47.
The influence of the concentration boundary layers on membrane potential (deltapsis) in a single-membrane system on basis of the Kedem-Katchalsky equations was described in cases of horizontally mounted neutral polymeric membrane separates non-homogeneous (mechanically unstirred) binary electrolytic solutions at different concentrations. Results of calculations of deltapsis as a function of ratio solution concentrations (Ch/Cl) at constant values of: concentration Rayleigh number (Rc), concentration polarization coefficient (zetas) and hydrostatic pressure (deltaP) were presented. Calculations were made for the case where on a one side of the membrane aqueous solution of NaCl at steady concentration 10(-3) mol x l(-1) (Cl) was placed and on the other aqueous solutions of NaCl at concentrations from 10(-3) mol x l(-1) to 2 x 10(-2) mol x l(-1) (Ch). Their densities were greater than NaCl solution's at 10(-3) mol x l(-1). It was shown that membrane potential depends on hydrodynamic state of a complex concentration boundary layer-membrane-concentration boundary layer, what is controlled by deltaP, Ch/Cl, Rc and zetas.
基于凯德姆-卡察尔斯基方程，描述了在水平安装的中性聚合物膜分离不同浓度的非均相（机械未搅拌）二元电解质溶液的单膜系统中，浓度边界层对膜电位（Δψs）的影响。给出了在浓度瑞利数（Rc）、浓度极化系数（ζs）和静水压力（ΔP）恒定值下，Δψs作为溶液浓度比（Ch/Cl）函数的计算结果。计算针对的情况是，在膜的一侧放置浓度稳定为10⁻³ mol·L⁻¹（Cl）的NaCl水溶液，在另一侧放置浓度从10⁻³ mol·L⁻¹到2×10⁻² mol·L⁻¹（Ch）的NaCl水溶液。它们的密度大于10⁻³ mol·L⁻¹的NaCl溶液的密度。结果表明，膜电位取决于复杂的浓度边界层-膜-浓度边界层的流体动力学状态，这由ΔP、Ch/Cl、Rc和ζs控制。
