Table 3 The adsorption kinetics parameters of OS-M(P) and OS-M(G) for Pb(II) and Cd(II).
Kinetics model and parameters | Pb(II) | Cd(II) | ||
|---|---|---|---|---|
OS-M(P) | OS-M(G) | OS-M(P) | OS-M(G) | |
Pseudo-first-order (PFO) | ||||
K1 | 0.0748 | 0.0105 | 0.1327 | 0.0966 |
qe | 242.4500 | 25.0033 | 46.3505 | 2.4031 |
R2 | 0.8396 | 0.9919 | 0.8150 | 0.9763 |
Pseudo-second-order (PSO) | ||||
K2 | 0.0006 | 0.0004 | 0.0051 | 0.0039 |
qe | 250.6846 | 29.5866 | 48.2535 | 2.8293 |
R2 | 0.9956 | 0.9959 | 0.9623 | 0.9916 |
Intra particle diffusion (IPD) | ||||
k1 | 1.4216 | 0.1553 | 0.2675 | 0.0107 |
C1 | 151.1172 | 2.1232 | 32.2140 | 0.3688 |
R12 | 0.7124 | 0.9891 | 0.8984 | 0.9659 |
k2 | 0.1358 | 0.0370 | 0.0603 | 0.0025 |
C2 | 216.4321 | 12.7888 | 40.6906 | 1.3768 |
R22 | 0.9365 | 0.9183 | 0.7420 | 0.8670 |
k3 | 0.0004 | 0.0091 | 0.0013 | 0.0007 |
C3 | 247.6231 | 20.1115 | 47.5809 | 2.0045 |
R32 | 0.7155 | 0.8675 | 0.9439 | 0.8235 |
