2.9 Conclusion
43
Table 2.4
Adsorption isotherm parameters for the selected metal ions adsorption onto G/CR-CS
298 K
308 K
318 K
Ions
Q
m (mg/g)
K
L (l/mg)
R 2
Q
m (mg/g)
K
L (l/mg)
R 2
Q
m (mg/g)
K
L (l/mg)
R 2
Langmuir
Pb(II)
147.30
± 2.30
0.006
± 0.02
0.989
153.20
± 3.70
0.009
± 0.02
0.989
162.14
± 3.20
0.010
± 0.02
0.991
Cu(II)
140.52
± 3.12
0.006
± 0.02
0.999
149.93
± 3.32
0.008
± 0.03
0.997
157.22
± 2.82
0.009
± 0.02
0.999
Ni(II)
137.53
± 1.52
0.005
± 0.01
0.985
142.14
± 2.61
0.008
± 0.02
0.999
155.12
± 2.21
0.008
± 0.03
0.995
Zn(II)
130.12
± 1.82
0.004
± 0.02
0.988
137.83
± 3.51
0.007
± 0.02
0.984
150.81
± 1.74
0.008
± 0.02
0.992
Freundlich
Pb(II)
29.32
± 0.05
2.32
± 0.02
0.763
33.31
± 0.02
1.65
± 0.02
0.842
36.98
± 0.02
2.54
± 0.02
0.843
Cu(II)
28.43
± 0.05
2.65
± 0.02
0.763
30.67
± 0.02
1.76
± 0.03
0.821
34.24
± 0.04
1.56
± 0.01
0.821
Ni(II)
25.43
± 0.06
1.76
± 0.01
0.812
27.65
± 0.01
1.65
± 0.02
0.754
30.60
± 0.01
2.97
± 0.02
0.843
Zn(II)
24.49
± 0.04
1.98
± 0.02
0.865
27.23
± 0.03
1.74
± 0.02
0.763
30.17
± 0.03
1.67
± 0.01
0.798