Adsorption kinetic model | Parameters | Values (mg/L) | ||||
---|---|---|---|---|---|---|
25 | 50 | 75 | 100 | 150 | ||
Pseudo first-order | q e (mg/g) | 12.41 | 24.39 | 36.13 | 46.06 | 66.66 |
q e, exp (mg/g) | 12.47 | 24.49 | 36.14 | 45.95 | 65.99 | |
k 1 (min−1) | 0.1305 | 0.1221 | 0.1105 | 0.1089 | 0.1019 | |
R 2 | 0.9941 | 0.9934 | 0.991 | 0.9935 | 0.9933 | |
SSE | 1.654 | 5.199 | 13.02 | 14.52 | 32.25 | |
RMSE | 0.3877 | 0.6875 | 1.088 | 1.149 | 1.712 | |
Pseudo second-order | q e, cal (mg/g) | 13.97 | 27.68 | 41.56 | 53.19 | 77.84 |
k 2 (g/mg min) | 0.0135 | 0.006159 | 0.00353 | 0.00267 | 0.00164 | |
R 2 | 0.9912 | 0.9907 | 0.99 | 0.9907 | 0.9871 | |
SSE | 0.9014 | 3.86 | 13.63 | 20.74 | 62.02 | |
RMSE | 0.2863 | 0.5924 | 1.113 | 1.373 | 2.374 | |
Elovich kinetic model | α E mg/(g min) | 1.478 | 2.958 | 0.272 | 0.181 | 0.2491 |
β E (g/mg) | 0.5539 | 1.128 | 3.303 | 4.596 | 5.872 | |
R 2 | 0.9378 | 0.9793 | 0.962 | 0.9608 | 0.9679 | |
SSE | 9.666 | 12.59 | 51.87 | 87.75 | 154.1 | |
RMSE | 0.8975 | 1.07 | 2.079 | 2.704 | 3.742 |