Research Article
Study about Doping Ion La3+ onto Surface of Pyrolusite Ore for Removing Simultaneously Both Fluoride and Phosphate from Wastewater
Table 2
Calculated equilibrium constants using the Langmuir and Freundlich equations for phosphate and fluoride adsorption on the LDPO.
| | Temp. (°C) | Langmuir | Freundlich | (mg/g) | (L/mg) | | | (mg/g) | |
| Phosphate | 20 | 83.33 | 0.026 | 0.994 | 10.8 | 33.7 | 0.909 | 30 | 76.92 | 0.023 | 0.990 | 9.43 | 18.8 | 0.932 | 40 | 66.67 | 0.021 | 0.986 | 6.67 | 14.1 | 0.951 |
| Fluoride | 20 | 12.82 | 0.607 | 0.993 | 1.67 | 2.83 | 0.941 | 30 | 10.56 | 0.283 | 0.995 | 1.79 | 5.83 | 0.873 | 40 | 9.43 | 0.159 | 0.994 | 1.43 | 9.53 | 0.901 |
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