6.5 Adsorption
95
Fig. 6.12 Comparison of adsorption models for the removal of MO using graphite and the molten
salt-produced graphene, reprinted from Ref. [98], copyright 2019, with permission from Elsevier
Table 6.3 Parameters of adsorption models for the adsorption of MO on graphite and 3D graphene
nanosheets fabricated in molten salt [98]
Isotherm model
Adsorption constant
Adsorbent
Graphite
3D graphene
Langmuir
Maximum adsorption capacity, q max (mg/g)
13.020
27.932
Binding constant, K L (l mg −1 )
1.457
0.378
Separation factor, R L
0.013
0.050
Correlation coefficient, R 2
0.999
0.999
Freundlich
Correction factor, n
18.761
10.193
Freundlich constant, K F (mg g −1 )
85.231
16.493
Correlation coefficient, R 2
0.932
0.8772
Temkin
Heat of adsorption constant, B 1
3771.947
1156.73
Equilibrium binding constant, K T
34680.41
19044.41
Correlation coefficient, R 2
0.923
0.857