Table 2
The nominal and measured sulfate (mg/L SO4) concentrations (mean ± SD), amount of added Na2SO4 into experimental treatments and the pH (mean ± SD) in brackish water control and experimental treatments (number of samples taken, n = 5), in Lake Konnevesi control and experimental treatments (n = 4) and in River Kokemäenjoki control and experimental treatments (n = 5) (Karjalainen et al., 2023).
| Added Na2SO4 | Nominal SO4 | Measured SO4 | pH | |
|---|---|---|---|---|
| Brackish water | ||||
| Kokkola control | 240.0 ± 7.1 | 7.6 ± 0.3 | ||
| 384 mg/L | 500 mg/L | 496.0 ± 13.6 | 7.5 ± 0.1 | |
| 828 mg/L | 800 mg/L | 810.0 ± 16.7 | 7.5 ± 0.1 | |
| 1567 mg/L | 1300 mg/L | 1280.0 ± 40.0 | 7.5 ± 0.1 | |
| 2307 mg/L | 1800 mg/L | 1780.0 ± 40.0 | 7.5 ± 0.1 | |
| 2898 mg/L | 2200 mg/L | 2180.0 ± 40.0 | 7.4 ± 0.0 | |
| 3490 mg/L | 2600 mg/L | 2600.0 ± 70.7 | 7.5 ± 0.1 | |
| 4081 mg/L | 3000 mg/L | 3050.0 ± 50.0 | 7.4 ± 0.0 | |
| 4820 mg/L | 3500 mg/L | 3475.0 ± 43.3 | 7.4 ± 0.1 | |
| 6299 mg/L | 4500 mg/L | 4500.0 ± 0.0 | 7.4 ± 0.0 | |
| Lake water | ||||
| L. Konnevesi control | 5.0 ± 0.5 | 7.3 ± 0.2 | ||
| 436 mg/L | 300 mg/L | 307.5 ± 8.3 | 7.1 ± 0.1 | |
| 880 mg/L | 600 mg/L | 615.0 ± 11.2 | 7.0 ± 0.1 | |
| 1323 mg/L | 900 mg/L | 920.0 ± 18.7 | 7.0 ± 0.0 | |
| 1767 mg/L | 1200 mg/L | 1175.0 ± 43.3 | 7.0 ± 0.0 | |
| 2358 mg/L | 1600 mg/L | 1600.0 ± 0.0 | 6.9 ± 0.0 | |
| 2654 mg/L | 1800 mg/L | 1800.0 ± 0.0 | 6.9 ± 0.0 | |
| 2950 mg/L | 2000 mg/L | 2000.0 ± 0.0 | 6.9 ± 0.0 | |
| 3541 mg/L | 2400 mg/L | 2500.0 ± 0.0 | 6.7 ± 0.0 | |
| 4281 mg/L | 2900 mg/L | 2900.0 ± 81.6 | 6.8 ± 0.0 | |
| 5168 mg/L | 3500 mg/L | 3600.0 ± 0.0 | 6.8 ± 0.0 | |
| River water | ||||
| R. Kokemäenjoki control | 12.2 ± 2.8 | 7.3 ± 0.1 | ||
| 426 mg/L | 300 mg/L | 304.0 ± 8.9 | 7.2 ± 0.2 | |
| 869 mg/L | 600 mg/L | 598.0 ± 22.8 | 7.1 ± 0.2 | |
| 1313 mg/L | 900 mg/L | 892.0 ± 29.5 | 7.2 ± 0.2 | |
| 1757 mg/L | 1200 mg/L | 1200.0 ± 0.0 | 7.1 ± 0.2 | |
| 2200 mg/L | 1500 mg/L | 1500.0 ± 0.0 | 7.1 ± 0.1 | |
| 2644 mg/L | 1800 mg/L | 1800.0 ± 0.0 | 7.1 ± 0.3 | |
| 3531 mg/L | 2400 mg/L | 2380.0 ± 44.7 | 7.1 ± 0.2 |
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