Unravelling the Methylene Blue Adsorption Mechanism on Doped and Nondoped Polyaniline: A Combined Molecular Modeling and Experimental Investigation

Table 5

Kinetic parameters of intraparticle diffusion, Boyd, and Elovich models for the MB@PANI-EB adsorption.

Initial concentration	C 0 (mg/L)	5	10	15	20	30
Intraparticle diffusion		First linear section
	C 1 (mg/g)	2.351	2.662	5.293	5.532	8.229
	K d1(mg·g·min^1/2)	1.512	2.491	3.641	4.990	2.533
	R ^2	0.998	0.975	0.992	0.951	0.978
	RMSE	0.059	0.497	0.372	0.812	0.514
		Second linear section
	C 2 (mg/g)	3.727	7.381	11.842	15.516	18.558
	K d2(mg·g·min^1/2)	0.007	0.032	0.014	0.016	0.044
	R ^2	0.958	0.974	0.968	0.964	0.988
	RMSE	0.859	0.491	0.672	0.681	0.414
Boyd	R ^2	0.864	0.883	0.836	0.757	0.669
	RMSE	0.553	0.659	0.863	1.319	0.911
Elovich	α (mg/g·min)	1.367	23.069	48.066	73.631	257.913
	β (g/mg)	1.341	1.057	0.635	0.517	0.925
	R ^2	0.777	0.864	0.831	0.845	0.975
	RMSE	0.553	0.659	0.863	1.319	0.911