Pumice Characteristics and Their Utilization on the Synthesis of Mesoporous Minerals and on the Removal of Heavy Metals
Table 3
Characteristic parameters and correlation coefficients of the experimental data according to Langmuir and Freundlich equations on zeolite at 25 ± 0.1°C.
Metal
Ionic radius* (Å)
Electro negativity**
Langmuir constant
Freundlich constant
(mg/g)
(L/mg)
Correlation coefficient ()
(mg/g)
Correlation coefficient ()
Co+2
1.88
1.88
1.27
23.99
0.986
16.16
0.340
0.983
Cu+2
1.30
1.90
1.59
45.70
0.986
24.60
0.144
0.999
Fe+2
1.83
1.83
2.86
67.12
0.986
26.50
0.205
0.985
Cd+2
1.69
1.69
3.12
131.9
0.999
40.00
0.094
0.976
Ionic radius (Å) and **electronegativity from [25].
