Research Article
Characterization and Utilization of Tannin Extract for the Selective Adsorption of Ni (II) Ions from Water
Table 1
Designs and levels of Taguchi method.
| | Independent variables | Symbol | Range and levels | | 1 | 2 | 3 | 4 |
| | Polymerization time (h) | A | 8 | 12 | 16 | 18 | | Acetaldehyde dose (mL) | B | 2 | 0 | 4 | 6 | | Formaldehyde dosage (mL) | C | 0 | 2 | 4 | 6 | | Tannin extract (g) | D | 5 | 7 | 9 | 11 |
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