Study of Fluoride Affinity by Zirconium Impregnated Walnut Shell Carbon in Aqueous Phase: Kinetic and Isotherm Evaluation

Table 4

Kinetic parameters of values of ZIWSC.

F^− (mg/L)	Pseudo-First order			Pseudo-Second order			Intraparticle diffusion
	𝐾1 (min^−1)	𝑞𝑒 (mg/g)	𝑟^2	𝐾2 (g/mg min)	𝑞𝑒 (mg/g)	𝑟^2	𝐾𝑑 (min^−1)	𝑟^2
2	0.0154	0.905	0.991	0.0188	1.34	0.998	0.79	0.975
4	0.0138	1.159	0.959	0.0094	2.72	0.996	1.60	0.972
6	0.0161	1.481	0.983	0.0066	4.15	0.998	2.47	0.971
8	0.0145	1.421	0.994	0.0073	5.32	0.999	3.30	0.956
10	0.0156	1.366	0.952	0.0104	6.38	0.999	4.11	0.933