Table 4 Adsorption kinetic parameters.
From: Study on the adsorption properties of organically modified diatomite for methylene blue
C0 (mg/L) | 200 | 400 | 600 | 800 | |
|---|---|---|---|---|---|
Qe experimental (mg/g) | 177.01 | 378.03 | 505.31 | 555.61 | |
Pseudo first order | K1 (1/min) | 0.0563 | 0.0561 | 0.0652 | 0.0558 |
Qe calculated(mg/g) | 50.39 | 103.65 | 198.97 | 142.58 | |
Linear R2 | 0.9434 | 0.9676 | 0.9853 | 0.9111 | |
Nonlinear R2 | 0.9949 | 0.9983 | 0.9947 | 0.9970 | |
Pseudo second order | K2 (g(mg min)) | 0.0043 | 0.0029 | 0.0016 | 0.0023 |
Qe calculated(mg/g) | 178.89 | 380.23 | 510.20 | 558.66 | |
Linear R2 | 0.9999 | 0.9999 | 0.9999 | 0.9999 | |
Nonlinear R2 | 0.9995 | 0.9999 | 0.9995 | 0.9991 | |
Intraparticle diffusion | Ki (min0.5) | 3.25 | 4.50 | 7.89 | 4.72 |
C | 146.96 | 335.30 | 430.76 | 508.91 | |
R2 | 0.8598 | 0.8669 | 0.9057 | 0.9490 | |
Elovich | α (mg/g·min) | 9.2*105 | 6.6*109 | 4.9*107 | 7.7*1014 |
β (mg/g) | 0.0887 | 0.0644 | 0.0373 | 0.0651 | |
Linear R2 | 0.8561 | 0.8618 | 0.9208 | 0.9320 | |
Nonlinear R2 | 0.9964 | 0.9986 | 0.9987 | 0.9997 | |
