Table 1. Physicochemical parameters of baseline water from ABSA water treatment plant collected during 15 consecutive days.
| Physicochemical parameters | Baseline water
Mean (±SD) n= 15 |
|---|---|
| Hardness (mg/L CaCO 3) | 89.9 ± 6.4 |
| Calcium (mg/L Ca
+2)
pH |
22.00 ± 2.54
6.85 ± 0.11 |
| Temperature (°C) | 21.42 ± 1.69 |
| Conductivity (mS/cm) | 0.62 ± 0.05 |
| Turbidity (NTU *) | < 1 |
| Total alkalinity (mg/L CaCO 3) | 83.0 ± 16.50 |
| Bicarbonates (mEq/L HCO 3 - ) | 1.63 ± 0.31 |
| Carbonates (mEq/L CO 3 = ) | < 0.08 |
| Total dissolved solids (mg/L) | 398.70± 40.90 |
| Chloride ion (mg/L Cl-) | 109.20 ± 10. 90 |
| Colour (scale Pt-Co) | < 2.5 |
| Langelier Index (LI) | -1.50 ± 0.11 |
*NTU: nephelometric turbidity units.