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 6.

Thermodynamic Parameter forCashew Plant Leave (CPL)

Parameters

ΔH

ΔS

ΔG

R2

 

(KJ/mol)

(KJ/mol/K)

 

 

 

 

 

 

Temperature(K)

 

 

298

308

318

328

333

 

Pb2+

-3192.9

-9.5295

539.837

-852.60

-129.3

-657.69

140.45

0.017

Cd2+

-0.3699

1.5197

-694.65

-801.96

-322.9

554.33

-116.4

0.029

Zn2+

1635.9

55.796

-272.82

54.8535

-252.4

-3380.7

-548.34

0.2531