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The parameter of Langmuir and Freundlich isotherm models for the retention of AR and MB dyes on MM-MDH nanoclay at 22°C
| Models of sorption isotherms | AR dye | MB dye | |
|---|---|---|---|
| Langmuir | q m (mg/g) | 34.96 | 20.92 |
| K L (L/g) | 0.615 | 0.282 | |
| R L | 0.075 | 0.307 | |
| R 2 | 0.9987 | 0.9989 | |
| Freundlich | K F (mg/g) | 21.97 | 13.18 |
| 1/n | 0.151 | 0.329 | |
| R 2 | 0.9765 | 0.9626 | |
Comparison between the MM-MDH nanoclay and other reported adsorbents for removal of AR and MB dyes
| Dyes | Solid phase | Uptake capacity | Reference |
|---|---|---|---|
| AR | Black tea leaves | 30.3 | [5] |
| AR | Carboxylated alginic acid | 9.17 | [70] |
| AR | Ferrous sulfate flocs | 6.623 | [71] |
| AR | Activated carbon | 18.76 | [51] |
| AR | Halloysite nanoclay | 13.89 | [42] |
| AR | Zinc ferrite Mn0.8Zn0.2Fe2O4 magnetic | 49.90 | [72] |
| AR | MM-MDH nanoclay | 34.33 | This work |
| MB | Green tea dredge | 71.4 | [73] |
| MB | Sugarcane bagasse | 12.42 | [74] |
| MB | Treated sugarcane bagasse | 58.9 | [75] |
| MB | Sodium alginate hydrogel | 51.34 | [76] |
| MB | Magnetic chitosan–PEGDE–EDTA composite | 5.04 | [77] |
| MB | Activated corn husk waste | [78] | |
| MB | MM-MDH nanoclay | 12.5 | This work |
The parameters for various kinetic models for removal of AR and MB dye onto MM-MDH nanoclay at 22°C
| Fractional power function kinetic model | ||||
|---|---|---|---|---|
| a | b | ab | R 2 | |
| AR | 9.116 | 0.267 | 2.433 | 0.991 |
| MB | 5.847 | 0.257 | 1.501 | 0.985 |