TABLE 2.
Adsorption kinetic parameters of the adsorption of methylene blue (MB) and methyl violet (MV) onto the PFPCS adsorbent at pH = 8 and 25°C. The initial concentrations of MB and MV were 500 and 1,000 mg L−1, respectively, and the contact time is 60 min.
| Dye | Qe-exp (mg g−1) | Pseudo-second-order | Pseudo-first-order | Intraparticle diffusion | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| t/Qt = 1/K2Qe 2 + t/Qe | ln (Qe– Qt) = lnQe - K1t | Qt = Kit0.5 + C | ||||||||
| Qe-cal (mg g−1) | K2 (g mg−1 min−1) | R2 | Qe-cal (mg g−1) | K1 (min−1) | R2 | Ki | C | R 2 | ||
| MV | 1,600.50 | 1,613.96 | 0.0010 | 0.9999 | 229.38 | 0.076 | 0.8572 | 72.60 | 1,095.06 | 0.5911 |
| MB | 3,692.65 | 3,757.93 | 0.0001 | 0.9999 | 1780.71 | 0.071 | 0.9012 | 243.1 | 1851.78 | 0.7470 |