Table 3.
Determined physicochemical parameters of real galvanic wastewater.
| Parameter | Unit | Result * |
|---|---|---|
| pH | − | 3.4 ± 0.1 |
| Electrical conductivity, EC | µS/cm | 25,800 ± 1290 |
| Salinity as NaCl | mg/L | 12,850 ± 640 |
| Complexing compounds as EDTA | mg/L | 180 ± 28 |
| Copper (Cu) | mg/L | 59.0 ± 5.90 |
| Cadmium (Cd) | mg/L | 4.50 ± 0.45 |
| Zink (Zn) | mg/L | 22.70 ± 2.27 |
* Parameter value ± the measurement uncertainty for an extension factor k = 2; for pH, uncertainty was ±0.1%; for electrocoagulation (EC) and salinity, measurement uncertainty was ±5%; for complexing compounds, Cu, Cd, Zn was ±10%.