Thermodynamic parameter

Adsorbent

Adsorbate

Value

Remark

Reference

Gibbs free energy (∆G0) kJ∙mol−1∙K−1

Bakers yeast

Nickel

−23.519

Spontaneous

10

Pleurotuseryngii

Malachite green

−10,388.3

Spontaneous

11

Coconut copra meal

Cadmium

−7.4

Spontaneous

12

Enthalpy change (∆H0) kJ∙mol−1

Chemically modified rice husk

Malachite green

63.76

Endothermic

13

Mansonia wood

Basic dye

67.1

Endothermic

14

Wheat shell

Basic dye

33.4

Endothermic

15

Hematite

Cadmium

−13.09

Exothermic

16

Entropy change

(∆S0) J∙mol−1

Lateritic nickel Ore

Lead

28.56

chemisorption

17

Bentonite

Copper

0.108

chemisorption

18

Modified oak sawdust

Copper

240

chemisorption

19