| Term |
Effect |
Coef |
SE Coef |
T* |
P** |
| Constant |
|
81.369 |
0.4475 |
181.83 |
0.000 |
| Main Factors |
|
| X |
-4.815 |
-2.408 |
0.4475 |
-5.38 |
0.001 |
| pH |
-0.556 |
-0.278 |
0.4475 |
-0.62 |
0.552 |
| BD |
10.525 |
5.263 |
0.4475 |
11.76 |
0.000 |
| Interaction of two factors |
|
| X.pH |
7.533 |
3.767 |
0.4475 |
8.42 |
0.000 |
| X.BD |
8.572 |
4.286 |
0.4475 |
9.58 |
0.000 |
| pH.BD |
-7.143 |
-3.572 |
0.4475 |
-7.98 |
0.000 |
| Interaction of three factors |
|
| X.pH.BD |
-9.954 |
-4.977 |
0.4475 |
-11.12 |
0.000 |
|
| *T= t-test, **P=Propabiliy level |
| Table 4: Statistical parameters for full 23 factorial design of Pb2+ biosorption. |
