Table 2.

Kinetic parameters for the adsorption of CPX on MCM-41 and Fe-MCM-41.

Kinetic model	Parameters	Values
		MCM-41	Fe-MCM-41
Pseudo-first-order	qe,cal (mg g−1)	20.0361	83.3333
	k1 (min−1)	−0.0175	0.8417
	R2	−0.0573	0.8950
Pseudo-second-order	k2 (g mg−1 min−1)	0.2775	0.0043
	R2	0.9996	0.9993
	qe,exp (mg g−1)	20.8354	93.7965
	qe,cal (mg g−1)	20.1207	95.2381
Intra-particle diffusion	KI	11.9766	37.1644
	CI	2.4231	3.3595
	R2	0.7465	0.9408
	KII	−0.4644	5.9203
	CII	21.8282	54.2310
	R2	0.0572	0.9603
	KIII	0.2410	1.6064
	CIII	17.6776	76.6507
	R2	−0.0625	0.9796