Table 1. Experimental Membrane Transport Properties and Fitted Surface-Charge Densities^a.

salt, concentrations	salt reflection coefficient (σs)	salt diffusivity reduction (P̃s)	σs/P̃s	surface-charge density (mC/m2)
KCl, 2 mM/1 mM	0.62	0.32	1.94	–5.7
KCl, 4 mM/2 mM	0.43	0.35	1.29	–9.5
LiCl, 2 mM/1 mM	0.53	0.48	1.10	–5.6
LiCl, 4 mM/2 mM	0.37	0.54	0.69	–9.3

^aThe space-charge model calculations were carried out for the average salt concentrations corresponding to the experimental conditions (1.5 and 3 mM) and for the two salts (KCl and LiCl) used in this study.