Variable CCD Experimental value
pH of aqueous solution 4.9884 5.0
Biosorption dosage, w, g/L 35.3702 35
Initial cobalt concentration, mg/L 18.0555 20
Temperature, K 306.4727 303
% biosorption 95.7337 93.9
Table 8: Comparison of optimum values obtained from CCD and experimentation.