Research Article
The Application of Response Surface Methodology for Lead Ion Removal from Aqueous Solution Using Intercalated Tartrate-Mg-Al Layered Double Hydroxides
Table 3
ANOVA for removal of lead from aqueous solution using tartrate-Mg-Al layered double hydroxide.
| Source | Degree of freedom | Sum of squares | Mean square | value | |
| Model | 14 | 24350.42 | 1739.32 | 30.86 | <0.0010 | Residual | 15 | 845.43 | 56.36 | | | Lack of fit | 10 | 845.42 | 84.54 | 48309.97 | <0.0010 | Pure error | 5 | 0.00875 | 0.00175 | | | Total | 29 | 25195.86 | | | | Time () | 1 | 8.54 | 8.54 | 0.15 | 0.7025 | pH () | 1 | 10371.72 | 10371.72 | 184.02 | <0.0010 | Dosage () | 1 | 4516.08 | 4516.08 | 80.13 | <0.0010 | Concentration () | 1 | 19.33 | 19.33 | 0.34 | 0.5668 |
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