Table 4: Points for the validation of the experimental design.

Adsorbent (mg)Dye concentration (mg/L)Decolorization (%)Error (%)
ExperimentalCalculated

2747.3944.68 ± 0.3442.644.79
4043.7469.15 ± 0.5070.782.31
3634.5892.73 ± 0.1488.934.27