Research Article
Preparation, Characterization, and Application of Metakaolin-Based Geopolymer for Removal of Methylene Blue from Aqueous Solution
Table 5
Kinetic parameters for the adsorption of MB on geopolymer.
| Dye C0 (mg/L) | Pseudo-first-order | Pseudo-second-order | Intraparticle diffusion model | qexp | qe (mg/g) | k1 (1/min) | | qe (mg/g) | k2 (g/mg min) | | I (mg/g) | kid (mg/g min0.5) | |
| 20 | 19.99 | 8.43 | 0.045 | 0.875 | 20.41 | 0.031 | 0.999 | 6.042 | 1.198 | 0.683 | 30 | 29.93 | 7.21 | 0.046 | 0.866 | 30.30 | 0.028 | 0.999 | 9.309 | 1.778 | 0.669 | 40 | 39.2 | 18.17 | 0.029 | 0.936 | 40 | 0.0098 | 0.999 | 11.64 | 2.334 | 0.692 |
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