Table 1 Box-Behnken experimental design for RSM model.
From: Characteristics of Cadmium Sorption by Heat-Activated Red Mud in Aqueous Solution
Level | Initial Cd(II) concentration (mg∙L−1) | Initial pH | Time (h) |
|---|---|---|---|
Low level (−1) | 1 | 2 | 1 |
Center level (0) | 102 | 4 | 12.5 |
High level (1) | 203 | 6 | 24 |
