Table 1.

Kinetics constants and parameters determined using kinetic models for the adsorption process.

Kinetic Model	Adsorbent
	ACL	ACL/Fe3O4
Pseudo-first order
qe cal	7.51	7.808
KP1st	0.0608	0.0819
R2	0.9151	0.9484
RMSE	0.5142	0.3687
Pseudo-second order
qe.cal	8.545	8.648
KP2st	0.009	0.0138
R2	0.9664	0.9730
RMSE	0.3235	0.2666
Elovich equation
α (mg/g min)	2.049	4.34
β (g/mg)	0.6328	0.7057
R2	0.9642	0.9156
RMSE	0.3337	0.4719
Intraparticle diffusion
Ki,1 (mg/g min1/2)	1.0021	1.0836
I1 (mg/g)	0.7179	1.0916
R2	0.9887	0.9965
Ki,2 (mg/g min1/2)	0.8855	0.7777
I2 (mg/g)	0.6332	2.4091
R2	0.9807	0.954
Ki,3 (mg/g min1/2)	0.0247	0.0081
I3 (mg/g)	7.4444	7.8024
R2	0.9495	0.9696