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. 2020 Apr 14;15(4):e0231045. doi: 10.1371/journal.pone.0231045

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 Log(qeqt)=logqek12.303.t 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 tqt=1k2qe2+1qe.t 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 Ceqe=1qmCe+1qmb q max (mg/g) 172.6
KL (L/mg) 0.7
R2 0.975
Freundlich Log qe = log KF+1n 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 qmβϵ2 q max (mg/g) 120.5
β 1.6
R2 0.66