Table 1. Langmuir and Freundlich model parameters at different pH conditions.

pH

Langmuir parameters

R2 †

Freundlich parameters

R2 †

 

Qmax
(mg/g)

b
(L/mg)

K
(L/g)

n

3.0

45.25

0.00256

0.9869

0.555

1.638

0.9877

3.5

53.48

0.00290

0.9761

0.770

1.682

0.9782

4.0

65.36

0.00361

0.9760

1.275

1.785

0.9772

4.5

69.93

0.00427

0.9863

1.919

1.947

0.9743

5.0

70.92

0.00567

0.9836

2.853

2.146

0.9840

5.5

74.63

0.00804

0.9570

4.268

2.351

0.9828

6.0

72.46

0.00727

0.9616

3.724

2.279

0.9836


Correlation coefficient.

Supported by UNESCO / MIRCEN network