Kinetic, Equilibrium and Thermodynamic Study of the Adsorption of Pb (II) and Cd (II) Ions from Aqueous Solution by the Leaves Biomass of Guava and Cashew Plants

Table 1.

Isotherm Parameters for GuavaPlant Leave (GPL)

Isotherm Models

Adsorbates (metal ions)

 

Pb2+

Cd2+

Zn2+

Langmuir

 

 

 

R2

0.7354

0.9945

0.9584

Qm

-19.4553

-36.1011

109.8901

KL

-0.2357

-0.0222

0.0172

Freunlich

 

 

 

R2

0.9116

0.9467

0.8628

N

1.2494

1.4194

1.1691

Kf

7.3029

0.4668

1.4424