Table 1 The correlation coefficient, R2 of pseudo-first and pseudo-second orders of RS and RSS.

From: The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Kinetic model

Parameter

CR

MB

RSS

RS

RSS

RS

Pseudo-first-order

R2

0.89

0.95

0.98

0.98

qe (mg/g)

19.47

1.97

19.86

11.55

k1 (min-1)

0.03

0.35

0.05

0.45

Pseudo-second order

R2

0.99

1.00

1.00

1.00

qe (mg/g)

24.65

21.93

25.43

20.65

k2 (g mg-1 min-1)

0.02

0.2212

0.03

0.1755

Intraparticle diffusion

KID

1.42

0.81

1.64

0.78

C

1.87

2.77

1.54

2.39

R2

0.91

0.96

0.89

0.88

Elovich

α (mg/g.min)

1.96

1.07

1.48

0.63

β (g/mg)

0.73

2.89

0.51

11.84

R2

0.85

0.73

0.81

0.94

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