Metals

Temp. (K)

KD(L/g)

ΔG°(kJ/mol)

ΔH°(kJ/mol)

ΔS°(J/mol)

Lead

293

1.857704

-1.51

3.52

17.01

303

1.906353

-1.62

313

1.960069

-1.75

323

2.019689

-1.89

333

2.248626

-2.24

Cadmium

293

1.468543

-0.94

0.62

5.33

303

1.494568

-1.01

313

1.492969

-1.04

323

1.502696

-1.09

333

1.520531

-1.16

Copper

293

1.178228

-0.39

0.84

4.19

303

1.188998

-0.44

313

1.192058

-0.46

323

1.199153

-0.49

333

1.236442

-0.59

Table 5: Thermodynamic parameters for the adsorption of Pb (II), Cd (II) and Cu (II) onto raw wheat straw (Co=50mg/L).
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