Research Article
Graphene Oxide Nanoadsorbent for the Removal of Fluoride Ion from Groundwater: Adsorbent Performance and Adsorption Mechanism
Table 4
The four isotherm models’ parameter values for fluoride adsorption by GO.
| Isotherms model | Parameters | Values |
| Langmuir | R2 | 0.96 | qm (mg g−1) | 6 | KL (L mg−1) | 0.098 | ∆G (KJ mol−1) | −10.6 | RL | 0.5 |
| Freundlich | R2 | 0.99 | KF (mg g−1) | 4.61 | n | 4.05 |
| Tempkin | R2 | 0.94 | KT (L g−1) | 0.86 | b (J mol−1) | 1760.4 |
| D–R | R2 | 0.92 | qm (mg g−1) | 5 | KD-R (L mg−1) | −0.001 | E (KJ mol−1) | 17 |
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