Modeling and Optimization for Production of Rice Husk Activated Carbon and Adsorption of Phenol

Table 2

Regression statistics for removal efficiency (model for response ).

Source	Standard deviation		Adjusted	Predicted	Comment
Linear	5.02	0.7729	0.7303	0.5487
2FI	4.29	0.8653	0.8031	0.1189
Quadratic	0.61	0.9979	0.9960	0.9826	Suggested
Cubic	0.056	1.0000	1.0000	0.9871	Aliased