Table 3. Kinetic models and their parameters for the biosorption of cadmium on DSC biosorbent.

	Intra-particle diffusion						Pseudo-1 st -order			Pseudo-2 nd -order
qe (exp.) (mg/g)	Ki1 (mg/g min1/2)	Ci1 (mg/g)	$R_1^2$	Ki2 (mg/g min1/2)	Ci2 (mg/g)	$R_2^2$	qe (cal.) (mg/g)	K1 (min−1)	R 2	qe (cal.) (mg/g)	K2 (g/mg min)	R 2
5.93	0.332	3.14	0.768	0.0024	5.858	0.805	1.432	0.033	0.658	5.672	0.264	0.999