Kinetic model

parameters

Concentration (mg/L)

30 mg/L

40 mg/L

50 mg/L

70 mg/L

100 mg/L

qe, exp. (mg/g)

8.704

9.954

10.72

12.94

10.35

Pseudo first-order

qe, calc. (mg/g)

1.371

1.782

0.746

0.800

1.521

k1(min−1)

0.478

0.295

0.225

0.188

0.267

R2

0.8521

0.9924

0.5798

0.9649

0.9579

∆qe (%)

97.62

94.92

107.5

108.4

98.59

Pseudo second-order

qe, calc. (mg/g)

9.066

10.19

10.79

13.11

10.53

k2 (g/(mg・min))

0.372

0.336

0.966

0.539

0.424

R2

0.9999

1.0000

0.9999

1.0000

0.9999

∆qe (%)

2.961

2.234

0.534

1.130

1.495

Intra-particle diffusion

kp (mg/(g・min1/2))

0.205

0.298

0.160

0.180

0.283

C

7.999

8.732

10.06

12.21

9.190

R2

0.9219

0.8068

0.6835

0.8549

0.7514

∆qe (%)

3.252

3.957

2.122

1.985

3.621