Table 5: Kinetic models for Cu and Fe ions removal from electroplating wastewater using CHS and COMP.
CHS |
COMP |
|||
Kinetic Models |
Metals |
Metals |
||
Pseudo-first order |
Cu |
Fe |
Cu |
Fe |
K1 |
5.33 × 10-4 |
1.27 × 10-3 |
1.33 × 10-3 |
3.76 × 10-3 |
R2 |
0.918 |
0.843 |
0.758 |
0.789 |
Standard error |
0.004 |
0.003 |
0.021 |
0.053 |
Pseudo-second order |
|
|
|
|
K2 |
2.40 × 10-4 |
2.90 × 10-4 |
5.60 × 10-4 |
9.40 × 10-4 |
R2 |
0.918 |
0.847 |
0.766 |
0.771 |
Standard error |
0.004 |
0.003 |
0.001 |
0.014 |
Elovich |
|
|
||
Δ |
21.7200 |
5.0300 |
9.600 |
1.630 |
Θ |
2.27 × 1018 |
1.63 × 107 |
1.41 × 107 |
14.700 |
R2 |
0.972 |
0.777 |
0.595 |
0.950 |
Standard error |
0.006 |
0.078 |
0.063 |
0.104 |
Intraparticle diffusion |
|
|
|
|
Kint |
0.015 |
0.069 |
9.600 |
0.200 |
L |
2.156 |
3.903 |
1.41 × 107 |
2.892 |
R2 |
0.956 |
0.814 |
0.595 |
0.997 |
Standard error |
0.007 |
0.071 |
0.001 |
0.006 |