Metal ions

Langmuir isotherm model

Freundlich isotherm model

qm (mg/g)

b (dm3/mg)

R2

Kf

1/n

R2

Cd2+

14.29

0.1077

0.996

3.25

0.334

0.952

Pb2+

26.32

0.5071

0.995

10.56

0.258

0.833

Fe2+

12.38

0.0622

0.993

1.58

0.456

0.947