纳滤膜过滤多组分离子电解质溶液的模型与计算——Ⅰ理论模型

Modeling and Calculation of Nanofiltration in Filtrating the Multi-Component Ions Electrolyte Solution——Theoretical Model

以固定电荷模型为基础,采用扩展的Nernst-Planck方程结合Gouy-Chapman(GC)理论和Donnan平衡模型,通过一系列假设和推导,得到多组分离子溶液透过纳滤膜时离子浓度在膜微孔内梯度微分方程和解膜微孔内梯度微分方程的有关参数和方程。

In this work, on the basis of the fixed charge model and a series of hypotheses and deductions, the extended Nernst-Planck equation, Gouy-Chapman （GC） theory and Donnan equilibrium model were used to gain the differential equation of concentration gradient of ions in the membrane micropores when the multi-component ions solution permeated the nanofiltration membrane. Furthermore, we have solved the related parameters and equations of the differential equation.