Table 2.
AIC values for kinetic and adsorption isotherm models.
| Kinetic models |
Adsorption isotherm models |
||||
|---|---|---|---|---|---|
| Element | Biochar | Second order | First order | Hill model | Langmuir model |
| Pb | MSP550 | -118.678 | -128.926 | 157.149 | 157.760 |
| OSR550 | -123.799 | -111.672 | 167.402 | 175.854 | |
| OSR700 | -97.746 | -108.825 | 150.232 | 195.784 | |
| SWP550 | -86.932 | -74.059 | - | - | |
| WSP550 | -137.935 | -134.369 | 174.766 | 183.262 | |
| Cd | MSP550 | -82.747 | -61.051 | 76.527 | 76.990 |
| OSR550 | -106.998 | -82.130 | 119.097 | 131.950 | |
| OSR700 | -80.193 | -67.331 | 79.58973 | 145.806 | |
| SWP550 | -89.405 | -89.728 | - | - | |
| WSP550 | -83.848 | -66.698 | 111.449 | 125.145 | |
| Zn | MSP550 | -93.397 | -87.825 | 56.463 | 54.486 |
| OSR550 | -114.667 | -98.404 | 58.295 | 67.439 | |
| OSR700 | -105.267 | -95.211 | 74.830 | 100.986 | |
| SWP550 | -42.776 | -39.922 | - | - | |
| WSP550 | -89.543 | -81.0505 | 94.719 | 101.688 | |
Note: the model for which AIC is minimal is the one that best describes the experimental data.