Table 4 Shows a comparison between Langmuir and Freundlich models.

From: Sustainable activated carbon from palm waste for aqueous nickel II adsorption

 

Langmuir isotherm constants

Freundlich isotherm constants

qmax(mg/g)

b (L/mol)

R2

1/n

Kf(mg/g)

R2

Nickel (II)

166.7

1.5

0.9998

0.255

553

0.9985