Table 3.

Values of 2nd order kinetic models.

initial conc. (mgl−1)	intercept	slope	q max measured (mg/g)	q max (mg/g)	q max2	k2	R2
25	0.3082	0.0177	39.67	56.49	3191.931	0.001017	0.9992
50	0.4699	0.0115	51.83	86.96	7561.437	0.000281	0.9473
100	0.6101	0.0103	51.17	97.09	9425.959	0.000174	0.989
140	0.5651	0.0115	51.83	86.96	7561.437	0.000234	0.9923
180	0.7088	0.0094	50.67	106.38	11317.34	0.000125	0.954
200	0.7203	0.0111	50.17	90.09	8116.224	0.000171	0.9767

∗Where qmax is biosorption capacity (mg/g), K2 is the 2nd order rate constant for the kinetic model (g mg⁻¹ min⁻¹) and R2 is the regression correlation coefficients.