Langmuir model

Freundlich model

adsorbate

qm (mmol∙g⁻¹)

KL (L∙mmol⁻¹)

R²

n

K_F (mmol∙L^(1−1/n)∙g⁻¹)

R²

0.125 mol/L NaOH treated

1.05

35.09

0.970

1.07

4.69

0.929

0.25 mol/L NaOH treated

0.84

22.81

0.986

0.85

4.81

0.927

2.5 mol/L NaOH treated

1.00

33.27

0.983

1.01

5.08

0.917

7.5 mol/L NaOH treated

1.17

35.48

0.981

1.20

3.98

0.932