Table 2: Kinetics parameters of the pseudo-first order and pseudo-second order kinetics models for the sorption of Cu(II), Zn(II) and Pb(II) on CSH (T = 22 ℃, C0 = 3000 mg.L-1, V = 200 mL, mCSH = 2.5 g).
|
Pseudo-first order model |
Cu (II) |
Zn (II) |
Pb (II) |
|
k1 (day-1) |
0.67 |
0.88 |
1.32 |
|
qe (mg.g-1) |
171 |
53 |
205 |
|
RMSE (mg.g-1) |
10.11 |
2.76 |
7.54
|
|
R2 |
0.959 |
0.972 |
0.986 |
|
Pseudo-second order model |
Cu(II) |
Zn(II) |
Pb(II) |
|
k2 (g.mg-1day-1) |
0.0047 |
0.023 |
0.011 |
|
qe (mg.g-1) |
195 |
59 |
220 |
|
RMSE (mg.g-1) |
5.58 |
1.65 |
2.43 |
|
R2 |
0.987 |
0.991 |
0.998 |