1. the ratio of 80:20 an effective removal of the best 89.2 percent.
2. Ferric chloride (FeCl3) concentration 46 percent dilute left 0.46 percent to 30 ml/L best.
3. Sodium hydroxide (NaOH) concentration 50 percent dilute left 5 percent to 0.5 ml/L best. And the 4. Sodium hypochlorite (NaOCl) concentration 10 percent to 0.3 ml/L best.