Research Article
Valorization of Oued Sebou Natural Sediments (Fez-Morocco Area) as Adsorbent of Methylene Blue Dye: Kinetic and Thermodynamic Study
Table 1
Pseudo-first-order and pseudo-second-order parameters for adsorption of methylene blue ions onto sediments at different concentrations.
| | | Pseudo-first-order | Pseudo-second-order | | MB concentration (mg·L-1) | qe, experimental (mg·g−1) | k1 (min−1) | qe, calculated (mg·g−1) | R2 | k2 (g·mg−1 min−1) | qe calculated (mg·g−1) | R2 |
| | 10 | 4.90 | 2.7.10−3 | 3.78 | 0.967 | 5.10–4 | 5.84 | 0.997 | | 20 | 9.41 | 9.2.10−3 | 3.25 | 0.991 | 6.9.10−4 | 11.07 | 0.994 | | 30 | 13.37 | 2.9.10−2 | 2.13 | 0.998 | 2.2.10−4 | 16.39 | 0.986 | | 40 | 16.40 | 4.9.10−2 | 1.39 | 0.75 | 1.1.10−4 | 20.38 | 0.996 | | 50 | 19.70 | 6.4.10−2 | 4.01 | 0.947 | 5.10–5 | 26.45 | 0.991 |
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