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Quantitative summary of the roughness parameters determined for various fouled membranes.
| Ra (nm) | Rq (nm) | Rz (nm) | |
|---|---|---|---|
| Clean membrane | 4.092 | 5.221 | 63.36 |
| CA-IOM | |||
| HPO | 30.9 | 60.1 | 831.6 |
| TPI | 64.8 | 89.4 | 681 |
| C-HPI | 0.269 | 0.326 | 1.523 |
| N-HPI | 90.8 | 136.9 | 833.9 |
| MA-IOM | |||
| HPO | 75.6 | 116.5 | 800.3 |
| TPI | 43.8 | 58.9 | 293.8 |
| C-HPI | 0.232 | 0.315 | 2.814 |
| N-HPI | 49.9 | 59.7 | 520.2 |
