Table 3.
Water flux variation of different membranes.
| Membrane | Initial Water Flux (J0, L/h·m2· 0.1 MPa) | Water Flux Reduction after Modification 1, % | Final Water Flux after 60 min Filtration (J, L/h·m2· 0.1 MPa) | Water Flux after Filtration External Cleaning (J′, L/h·m2· 0.1 MPa) | Relative Flux Recovery 2 (RFR, %) |
|---|---|---|---|---|---|
| PES | 1.87 × 104 | – | 9.80 × 102 | 1.03 × 104 | 55.1 |
| PES-g-DMAEMA-BB | 6.50 × 103 | 34.8 | – | – | – |
| PES-g-DMAEMA-OB | 5.80 × 103 | 31.0 | – | – | – |
| PES-g-DMAEMA-DB | 1.62 × 104 | 86.6 | 5.41 × 103 | 1.43 × 104 | 88.3 |
| PES-g-DMAEMA-HB | 1.51 × 104 | 80.7 | 5.38 × 103 | 1.40 × 104 | 92.7 |
1 The value was calculated by the initial water flux ratio of the modified membrane to PES; 2 The value was calculated by the ratio of J′ to J0.