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 2.

Isotherm Parameters forCashew Plant Leave (CPL)

Isotherm Models

Adsorbates (Metal Ions)

 

Pb2+

Cd2+

Zn2+

Langmuir

 

 

 

R2

0.9855

0.9948

0.9583

Qm

-33.8983

-23.3645

32.3624

KL

-0.0368

-0.0865

0.1740

Freunlich

 

 

 

R2

0.9587

0.9604

0.8791

N

1.4240

1.6502

0.9614

Kf

0.8651

29.2954

4.0794