Table 2 Variation of membrane structural properties and charge density of surface modified PAN UF membranes.
From: Ultrafiltration membrane for effective removal of chromium ions from potable water
pH | 2 | 3.3 | 4 | 5 | 6 | 7 | 9 |
|---|---|---|---|---|---|---|---|
Pore size distribution (σ*) (nm) | 1.39 | 0.98 | 0.74 | 0.52 | 0.49 | 0.41 | 0.39 |
Mean Porosity (Ak) (%) | 1.41 | 1.15 | 1.13 | 0.83 | 0.72 | 0.69 | 0.65 |
Permeability (Lp) ( × 10−11 ms−1 Pa−1) | 4.46 | 9.75 | 6.60 | 2.27 | 1.37 | 0.83 | 0.87 |
electrokinetic charge density (σe) (×10−4 Cm−2) | 15.6 | −0.19 | −1.44 | −2.52 | −3.79 | −4.93 | — |
Volumetric Charge density (|Xd |) (mol m−3) | 31.8 | 0.60 | 3.60 | 5.36 | 8.01 | 10.44 | — |
