Table 3.
Results of ANOVA statistical analysis of tested factors’ effect on size of the produced iron nanoparticles, employing Box-Behnken design.
| Variable | Effect (coefficient) | Standard error | P value | Significance |
|---|---|---|---|---|
| A | 9.63 | 19.38 | 0.6406 | Non-Significant |
| B | − 126.13 | 19.38 | 0.0013 | Significant |
| C | − 21.00 | 19.38 | 0.3281 | Non-significant |
| AB | 11.50 | 27.41 | 0.6923 | Non-significant |
| AC | − 35.25 | 27.41 | 0.2548 | Non-significant |
| BC | 107.75 | 27.41 | 0.0111 | Significant |
| A2 | 138.75 | 28.53 | 0.0046 | Significant |
| B2 | 18.25 | 28.53 | 0.5506 | Non-significant |
| C2 | 117.50 | 28.53 | 0.0092 | Significant |
| Model | 137.00 | 31.66 | 0.0084 | Significant |
A = Salt conc. “FeSO4.7H2O”, B = Culture filtrate volume, C = pH.