Table 8. The kinetic and isotherm parameters fitted for CIP adsorption [40].
Kinetic Model | Linear Form | Parameter | Value | ||
---|---|---|---|---|---|
50 mg/L | 75 mg/L | 100 mg/L | |||
Pseudo- first order | qe,cal [mg/g] | 36.4 | 83.35 | 121.1 | |
K1 [min-1] | -0.12 | -0.13 | 0.13 | ||
R2 | 0.97 | 0.92 | 0.91 | ||
Pseudo- second order | qe,cal [mg/g] | 54.7 | 82.4 | 115.7 | |
K2 [min-1] | 0.01 | 0.00 | 0.00 | ||
R2 | 0.99 | 0.97 | 0.9 | ||
Intra-particle diffusion | qt = kp.t0.5+c | Kp [mg/g. min-0.5] | 4.53 | 11.3 | 15.9 |
R2 | 0.99 | 0.97 | 0.98 | ||
Isotherm model | Linear Form | Parameter | Value | ||
Langmuir | q max (mg/g) | 172.6 | |||
KL (L/mg) | 0.7 | ||||
R2 | 0.975 | ||||
Freundlich | Log qe = log log Ce | KF mg/g(L/mg)1/n | 89.07 | ||
N | 5.3 | ||||
R2 | 0.971 | ||||
Temkin | qe = B1ln.kt+B1lnCe | k t (L/mg) | 0.77 | ||
B1 | 18.19 | ||||
R2 | 0.91 | ||||
Dubinin–Radushkevich | ln qe = ln qm−βϵ2 | q max (mg/g) | 120.5 | ||
β | 1.6 | ||||
R2 | 0.66 |