Column Adsorption Studies for the Removal of Cr(VI) Ions by Ethylamine Modified Chitosan Carbonized Rice Husk Composite Beads with Modelling and Optimization

Table 4

Model summary statistics for adsorption capacity of Cr(VI) using EAM-CCRCBs.

Source	Standard deviation	𝑅^2	Adj 𝑅^2	Predicted 𝑅^2	Press	Comments
Linear	4.49	0.9234	0.9091	0.8578	599.71
2F1	4.72	0.9314	0.8997	0.8456	651.27
Quadratic	2.06	0.9900	0.9810	0.9165	352.02	Suggested
Cubic	0.47	0.9997	0.9990	0.9459	228.11	Aliased