Contact time (h) | Initial concentration (mg) | Dose (gm) | pH | Removal efficiency (%) | Desirability |
4.5 | 50 | 0.1 | 4.04 | 61.77 | 0.996 |
4.32 | 50 | 0.1 | 3.98 | 61.38 | 0.989 |
4.5 | 54.11 | 0.1 | 4.02 | 60.33 | 0.972 |