本文利用基于扩散和对流的基本输运方程，研究了带负电荷的膜对高氯酸盐（Cl04）的排斥作用。唐南平衡方程解释了带负电荷的膜对Cl04-的排斥作用。如果Cl04-截留率由这些方程控制，则可以做出以下预测:Cl04-截留率将随着pH值的增加而增加；Cl04——截留率随离子强度的增加而降低；而且，Cl04-排斥反应将受到溶液中其他一价和多价阳离子（反离子）和阴离子（共离子）的影响。公寓- 用于纳滤和超滤膜的片状膜单元被用于测试这些预测的实验。

This paper reports on exclusion of perchlorate (Cl04) by membranes possessing a negative charge using basic transport equations based on diffusion and convection. The Donnan Equilibrium equation, explains the exclusion of Cl04- by negatively charged membrane. If Cl04- rejection is controlled by those equations, the following predictions can be made: Cl04- rejection will increase with increasing pH; Cl04- rejection will decrease with increasing ionic strength; and, Cl04- rejection will be influenced by the presence of other mono- and multivalent cations (counterions) and anions (co-ions) in solution. A flat-sheet membrane unit for nanofiltration and ultrafiltration membranes was employed for experiments testing these predictions.