Temperature T (˚C)

pH of NaCl

Concentration of NaCl

Isotherm

Langmuir II

Equation

y = 0.1148x − 0.0254

y = 0.1554x − 0.1188

y = 0.1221x − 0.0447

R²

0.9967

0.9893

0.9982

q_m

39.37

6.435

8.190

K_L

40

1.308

2.731

Isotherm

Langmuir III

Equation

y = −0.0192x + 0.1116

y = −0.0928x + 0.1459

y = −0.0403x + 0.1198

R²

0.8828

0.8475

0.9373

q_m

8.961

6.854

8.347

K_L

466.696

1.572

2.973

Isotherm

Freundlich

Equation

y = −0.1508x + 2.4009

y = −0.3243x + 2.5413

y = −0.2063x + 2.4534

R²

0.9646

0.959

0.9842

K_F

11.033

12.696

11.629

1/n

0.1508

0.3243

0.2063