Adsorption of Nitrate onto ZnCl₂-Modified Coconut Granular Activated Carbon: Kinetics, Characteristics, and Adsorption Dynamics

Table 2

Parameters for different adsorption kinetic models.

(mgN·L^−1)	(mgN·g^−1)	Pseudo-first-order kinetic model			Pseudo-second-order kinetic model			Intraparticle diffusion model
		(mgN·g^−1)	(h^−1)	R^2	(mgN·g^−1)	(g·(mgN·h)^−1)	R^2	(mgN·(g·min^1/2)^−1)		R^2
10	0.47	0.33	0.040	0.995	0.51	0.202	0.995	0.044	0.117	0.966
20	0.93	0.46	0.014	0.413	0.72	0.380	0.977	0.056	3.175	0.593
50	1.81	1.64	0.049	0.910	2.04	0.037	0.981	0.190	0.293	0.966
100	2.49	1.31	0.018	0.664	2.32	0.057	0.985	0.184	0.769	0.793