Table 3 The parameters of kinetics models for adsorption of CR dye onto K@AM-CTS composite beads.

From: Reusable kaolin impregnated aminated chitosan composite beads for efficient removal of Congo red dye: isotherms, kinetics and thermodynamics studies

Kinetics model

Parameter

Value

Pseudo-first order

qe,cal (mg/g)

19.80

k1 (min−1)

0.0667

R2

0.9849

Pseudo-second order

qe,cal (mg/g)

24.81

k2 (g mg−1 min−1)

0.00551

R2

0.9683

Intra-particles diffusion

 

First step

Second step

Kp (mg g−1 min−1/2)

3.642

2.656

C (mg g−1)

1.0786

4.9127

R2

0.97

0.999

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