Table 4: Isotherm models parameters for the adsorption of Cu and Fe ions using CHS and COMP.
CHS |
COMP |
|||
Isotherm Models |
Metals |
Metals |
||
Jovanovic |
Cu |
Fe |
Cu |
Fe |
Kj |
0.348 |
0.211 |
0.348 |
0.218 |
qmax |
7.907 |
11.900 |
7.905 |
11.905 |
R2 |
0.999 |
0.999 |
0.999 |
0.977 |
Standard error |
6.0 × 10-4 |
2.34 × 10-6 |
4.0 × 10-4 |
0.068 |
Freundlich |
|
|
|
|
Kf |
6.402 |
11.759 |
6.377 |
10.907 |
N |
-11.620 |
-515.464 |
-11.232 |
-39.154 |
R2 |
0.959 |
0.856 |
0.988 |
0.919 |
Standard error |
7.5 × 10-3 |
1.1 × 10-3 |
4.0 × 10-3 |
7.17 × 10-3 |
Temkin |
|
|
||
K1 |
-0.620 |
-0.023 |
-0.641 |
-0.352 |
K2 |
3.5 × 10-5 |
1.2 × 10-22 |
5.16 × 10-5 |
6.35 × 10-28 |
R2 |
0.966 |
0.856 |
0.990 |
0.954 |
Standard error |
0.0494 |
0.0129 |
0.0264 |
0.0582 |
Harkins-Jura |
|
|
|
|
AHJ |
-130.513 |
-1.6 × 104 |
-126.326 |
-1127.39 |
BHJ |
-3.114 |
-113.961 |
-3.033 |
-9.433 |
R2 |
0.946 |
0.855 |
0.984 |
0.911 |
Standard error |
3.4 × 10-3 |
1.56 × 10-5 |
2.0 × 10-4 |
1.0 × 10-4 |