Studies on Adsorption of Fluorescein Dye from Aqueous Solutions Using Wild Herbs

Table 3

Parameters of adsorption kinetic models.

Kinetic models	Adsorbent
	JH	SH
qe,exp, mg g^−1	1.710	1.438
Pseudo-first-order
qe,cal, mg g^−1	0.174	0.273
k1, g/mg min	0.013	0.008
R^2	0.969	0.853
Pseudo-second-order
qe,cal, mg g^−1	1.720	1.436
k2, g/mg·min	0.197	0.097
h, mg g^−1·min	0.583	0.200
	16.56	9.28
R^2	0.999	0.999
Intraparticle diffusion
Step 1
kipd, mg g^−1·min^1/2	0.010	0.033
C, mg g^−1	1.555	1.006
R^2	0.990	0.927
Step 2
kipd, mg g^−1·min^1/2	0.008	0.003
C, mg g^−1	1.576	1.338
R^2	0.991	0.907
Liquid-film diffusion
Klfd, l/min	0.013	0.008
C, mg g^−1	2.283	1.661
R^2	0.969	0.853