Table 2.
The performance comparison of NF-40 with other NF membranes with various post-treatment methods.
| Membrane | Operating Pressure (bar) | Post-Treatment | Water Permeability (L·m−2·h−1·bar−1) | Na2SO4 Rejection (%) | References |
|---|---|---|---|---|---|
| TFC-M3 | 13.8 | thermal treatment | 13.6 | 97.7 | [17] |
| PA@A-0 | 6 | heat curing | 16.7 | 97.4 | [28] |
| PA-16 | 6 | organic solution | 7.6 | 94.9 | [25] |
| PEI/TMC | 4 | ethanol | 9.5 | 56.0 | [38] |
| MWCNT-OH | 6 | heat-treatment | 6.9 | 97.6 | [39] |
| NFM-5 | 6 | heat-treatment | 15.2 | 97.0 | [40] |
| NF-90 | 5 | alkali solution | 15.8 | - | [41] |
| TFNC-2 | 13 | hot pressing | 22.3 | 92.0 | [42] |
| NF-40 | 8 | adding Ca2+ | 29.76 | 98.1 | This work |