Table 4 Analysis of variance (ANOVA) results for the fitted polynomial model for COD removal using photocatalytic process with lamp 15-W
Lamp 15 | Sum of squares | df | Mean square | F value | p-value |
|---|---|---|---|---|---|
Cipro concentration | 370.40 | 1 | 370.40 | 4.61 | 0.04 |
CuO dosage | 2646.92 | 1 | 2646.92 | 32.96 | 0.00 |
pH | 1054.37 | 1 | 1054.37 | 13.13 | 0.01 |
pH2 | 899.84 | 1 | 899.84 | 11.21 | 0.01 |
Residual | 722.71 | 9 | 80.30 | ||
Lack of fit | 594.71 | 5 | 118.94 | 3.72 | 0.11 |
Pure error | 128.00 | 4 | 32.00 |