Research Article
Fluoride and Arsenite Removal by Adsorption on La2O3-CeO2/Laterite
Table 6
Parameters of Langmuir’s and Freundlich’s isotherm models at 25°C.
| | Langmuir’s isotherm model | Freundlich’s isotherm model | (mg·g–1) | | | | | |
| La2O3 | Arsenite | 89.10 | 0.112 | 0.988 | 20.276 | 3.359 | 0.955 | Fluorite | 67.83 | 0.020 | 0.997 | 3.761 | 1.851 | 0.992 |
| CeO2 | Arsenite | 52.54 | 0.040 | 0.987 | 7.235 | 2.650 | 0.943 | Fluorite | 28.17 | 0.204 | 0.991 | 7.443 | 3.696 | 0.964 |
| Laterite | Arsenite | 6.34 | 0.029 | 0.998 | 0.679 | 2.450 | 0.987 | Fluorite | 4.27 | 0.055 | 0.998 | 0.764 | 3.056 | 0.985 |
| LCL | Arsenite | 67.08 | 0.063 | 0.996 | 11.400 | 2.873 | 0.965 | Fluorite | 58.02 | 0.039 | 0.991 | 7.702 | 2.617 | 0.980 |
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