Table 2 The parameters of the adsorption kinetic study.

From: Removal of Sb(III) by 3D-reduced graphene oxide/sodium alginate double-network composites from an aqueous batch and fixed-bed system

The initial concentration of Sb(III) (mg/L)

10

20

50

qexp (mg/g)

1.27

2.04

2.77

Pseudo-first order

qcal (mg/g)

0.31

0.51

0.27

k1

0.0054

0.0064

0.0039

R2

0.9441

0.9353

0.3067

Pseudo-second order

qcal (mg/g)

1.28

2.07

2.76

k2

0.0581

0.0366

0.0491

R2

0.9999

0.9999

0.9996

Intraparticle diffusion

ki1

0.0477

0.1028

1.0040

ki2

0.0194

0.0314

0.0529

ki3

0.0034

0.0036

 − 0.0030

R12

1.0000

0.9859

0.8027

R22

0.9526

0.9762

0.9836

R32

0.8938

0.9011

0.4452

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