Table 5 The effectiveness of factors in PBD and Taguchi design
Effectiveness | Plackett-Burman design | Taguchi design | ||||
|---|---|---|---|---|---|---|
MG | RhB | CR | MG | RhB | CR | |
1 | pH | Initial dye concentration | Initial dye concentration | Adsorbent dosage | Initial dye concentration | Adsorbent dosage |
2 | Adsorbent dosage | Ionic strength | Adsorbent dosage | pH | Contact time | Initial dye concentration |
3 | Contact time | Contact time | Ionic strength | Ionic strength | Ionic strength | Ionic strength |
4 | Ionic strength | Adsorbent dosage | Contact time | Initial dye concentration | Adsorbent dosage | Contact time |
5 | Initial dye concentration | pH | pH | Contact time | pH | pH |