Table 1 Kinetic models and fitted parameters for Sb(V) sorption data.

From: Antimonate sequestration from aqueous solution using zirconium, iron and zirconium-iron modified biochars

Biochar

qe-exp (mg/g)

Pseudo first-order

Pseudo second-order

Elovich

Intraparticle diffusion

pH

 

k1 (h−1)

qe-cal

R2

k2 (g mg−1 h−1)

qe-cal (mg/g)

h ( mg/g h)

R2

β (mg/g)

α (mg/g.h)

R2

kid (g mg−1 h−1/2)

C (mg/g)

R2

BSBC

1.40

0.042

0.96

0.89

0.19

1.43

0.39

0.99

0.42

0.21

0.97

0.10

0.48

0.82

2

ZrBSBC6.5

4.06

0.065

1.50

0.89

0.10

4.15

1.75

0.99

1.56

0.57

0.90

0.26

1.65

0.70

2

ZrBSBC12.5

4.45

0.031

0.96

0.44

0.12

4.55

2.54

0.99

1.89

0.61

0.88

0.27

1.99

0.67

2

Zr–FeBSBC (1:20)

4.91

0.046

1.84

0.88

0.09

4.98

2.31

0.99

2.03

0.62

0.92

0.27

2.24

0.70

4

Zr–FeCl3BSBC (1:5)

4.78

0.052

1.96

0.88

0.08

4.86

2.03

0.99

2.22

0.61

0.91

0.28

2.10

0.70

4

FeBSBC

3.76

0.046

2.05

0.94

0.07

3.85

1.05

0.99

1.10

0.60

0.90

0.26

1.25

0.71

3

FeCl3BSBC

3.53

0.063

2.27

0.89

0.05

3.69

0.67

0.99

0.78

0.60

0.97

0.27

0.91

0.83

2

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