| Short term mode (3-h contact time, pH = 1.5) | ||||||||
| b ±0.002 | Q ±0.2 | R2 | ||||||
| Total Cr | 0.0061 | 48.5 | 0.999 | |||||
| Cr(VI) | 0.0095 | 38.0 | 0.997 | |||||
| Long term mode (5-day contact time, pH = 1.5) | ||||||||
| b ±0.002 | Q ±0.2 | R2 | ||||||
| Total Cr | Nonlinear plot | |||||||
| Cr(VI) | 0.034 | 64.5 | 0.997 | |||||
| Short term mode (3-h contact time, pH = 2.0) | ||||||||
|
| b ±0.002 | Q ±0.2 | R2 | |||||
| Total Cr | 0.066 | 42.0 | 0.999 | |||||
| Cr(VI) | 0.047 | 48.5 | 0.994 | |||||
| Long term mode (5-day contact time, pH = 2.0) | ||||||||
| b ±0.001 | Q ±0.2 | R2 | ||||||
| Total Cr | 0.0485 | 41.8 | 0.995 | |||||
| Cr(VI) | 0.0522 | 64.9 | 0.978 | |||||