|
Table 4. Comparison
between adsorption rate constants, qe estimated and coefficients
of correlation associated to the Lagergren pseudo first-order and to
the pseudo second-order kinetic models (C0 = 18.4 mg/mL,
w = 0.100g, V = 25mL, pH 5.0, agitation rate 150 rpm). |
|
T (K) |
First-order kinetic model |
Second-order kinetic model |
qe,exp(mg/g) |
||||
|
k1,ads(min-1) |
qe (mg/g) |
R |
k2,ads(g/mg.min) |
qe (mg/g) |
R |
||
| 298 |
0.150 (0.011)a |
1.21 (0.35) |
0.967 |
0.349 (0.043) |
4.30 (0.03) |
1.000 |
4.26 |
| 313 |
0.180 (0.012) |
1.51 (0.46) |
0.950 |
0.307 (0.035) |
4.30 (0.03) |
1.000 |
4.26 |
| 328 |
0.232 (0.020) |
1.25 (0.29) |
0.989 |
0.791 (0.118) |
4.09 (0.03) |
1.000 |
4.10 |
| a: Figures in parenthesis are standard
deviations (n = 10 first-order kinetic model; n = 20 second-order
kinetic model). |
|
|