3.8 Outcome of Kinetic Experiment
67
Table 3.3
Kinetic criteria for binding the metal ions to GXXB
Metal ions
Pseudo-first-order parameters
Pseudo-second-order parameters
Intraparticle diffusion parameters
k
1 (min −1
)
q
e (mmol/g)
R 2
k
2 (g/mmol.min)
q
e (mmol/g)
R 2
k
idm (mmol/gmin 1/2
)
R 2
Pb(II)
0.011
1.930
0.842
7.782
4.383
0.992
7.103
0.993
Cu(II)
0.021
1.981
0.794
8.224
4.784
0.994
7.592
0.974
Ni(II)
0.022
1.953
0.822
6.163
3.352
0.993
7.133
0.963
Cr(VI)
0.044
2.104
0.791
5.942
3.222
0.992
6.182
0.992
Zn(II)
0.012
1.752
0.883
4.592
3.112
0.993
5.323
0.973
Cd(II)
0.032
2.141
0.792
4.321
2.543
0.982
4.982
0.983