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Coulombic efficiencies of the different reductive processes in the cathode chamber.
| Reductive Coulombic efficiencies | Mineral medium | Synthetic groundwater |
|---|---|---|
| CERD (%) | 2.6 ± 0.4 | 1.6 ± 0.3 |
| (%) | 98.1 ± 0.5 | 51.1 ± 0.6 |
| CERS (%) | - | 14.5 ± 0.4 |
| CERN (%) | - | 31.9 ± 0.7 |
| CEtot (%) | 100.7 ± 0.9 | 99.1 ± 2.0 |
