Preparation and Kinetic Studies of Cross-Linked Chitosan Beads Using Dual Crosslinkers of Tripolyphosphate and Epichlorohydrin for Adsorption of Methyl Orange

Table 2

Summary of the kinetic adsorption calculation.

Kinetics model	qe (calc)	k	r^2
Active site capacity
Pseudo 1^st order	7.928 × 10^1 mg/g	1.29 × 10^−3/min	0.994
Pseudo 2^st order	7.468 mg/g	2.328 × 10^−5 g/mg.min	0.645
Intraparticle diffusion
Ki1		0.777 mg/g.min^0.5	0.994
Ki2		1.782 mg/g.min^0.5	0.990
Ki3		2.865 mg/g.min^0.5	0.999
Ki4		4.930 mg/g.min^0.5	0.996
Ki5		0.223 mg/g.min^0.5	0.934
Fractional time
n ≠ 1		9.72 × 10^−2 mg/L.min	0.933
n = 1		1.03 × 10^−3/min