Research Article
Effect of Alkali Treatment of Wheat Straw on Adsorption of Cu(II) under Acidic Condition
Table 1
Isotherm parameters obtained for the adsorption of Cu(II) onto wheat straw at different initial concentrations and temperature.
| Isotherm models | Isotherm parameters | UWS | AWS |
| (K) | 288 | 298 | 308 | 288 | 298 | 308 | Langmuir | | | | | | | | 6.883 | 7.137 | 7.687 | 8.390 | 8.980 | 9.860 | (mg/g) | 10.111 | 10.238 | 10.801 | 10.589 | 10.680 | 10.783 | (L/mg) | 0.017 | 0.0187 | 0.0199 | 0.0316 | 0.0606 | 0.157 | | 0.993 | 0.994 | 0.984 | 0.993 | 0.979 | 0.966 | Freundlich | | | | | | | (mg/g) | 0.421 | 0.475 | 0.537 | 0.824 | 1.747 | 1.998 | | 0.591 | 0.576 | 0.567 | 0.502 | 0.357 | 0.351 | | 0.994 | 0.993 | 0.992 | 0.995 | 0.987 | 0.984 |
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