Research Article
Biosorption and Diffusion Modeling of Pb(II) by Malt Bagasse
Table 1
Design matrix and experimental results for the central composite factorial design.
| | Run | Coded variable | Real variable | Dependent variable | | | Initial pH | Agitation speed (rpm) | Lead removal (%) |
| | 1 | | 0 | 2.0 | 100.0 | 7.9 | | 2 | −1 | +1 | 2.4 | 170.7 | 26.8 | | 3 | −1 | −1 | 2.4 | 29,3 | 30.1 | | 4 | 0 | | 3.3 | 200.0 | 73.4 | | 5 | 0 | 0 | 3.3 | 100.0 | 73.4 | | 6 | 0 | 0 | 3.3 | 100.0 | 73.8 | | 7 | 0 | 0 | 3.3 | 100.0 | 75.6 | | 8 | 0 | | 3.3 | 0.0 | 54.7 | | 9 | +1 | +1 | 4.1 | 170.7 | 89.3 | | 10 | +1 | −1 | 4.1 | 29.3 | 72.9 | | 11 | | 0 | 4.5 | 100.0 | 91.2 |
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