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Currents obtained at the maximum applied voltage of 0.6 V as a function of the feed composition and the type of membrane. Receiver solution: 0.5 M NaCl.
| Membrane Type | Feed Solution | Current (mA) at 0.6 V |
|---|---|---|
| (1) Unmodified | KCl + K2SO4 | 3.5 |
| KCl + Na2SO4 | 3.2 | |
| NaCl + Na2SO4 | 2.7 | |
| LiCl + Na2SO4 | 2.6 | |
| (3) One side 3 g/L PAA | KCl + K2SO4 | 3.4 |
| KCl + Na2SO4 | 3.3 | |
| NaCl + Na2SO4 | 3.2 | |
| LiCl + Na2SO4 | 2.8 | |
| (3) One side 5 g/L PAA | KCl + K2SO4 | 3.8 |
| KCl + Na2SO4 | 3.4 | |
| NaCl + Na2SO4 | 3.2 | |
| LiCl + Na2SO4 | 3.0 |
