Kinetic model parameters for ketoprofen and aspirin adsorption.
| Ketoprofen | Aspirin | |
|---|---|---|
| Q e,exp (mg g−1) | 286 | 714 |
| Pseudo-first-order | ||
| Q e,cal (mg g−1) | 286.62 | 711.19 |
| K 1 (min−1) | 0.082 | 0.106 |
| t 1/2 (min) | 8.453 | 6.539 |
| R 2 | 0.999 | 0.999 |
| SD (mg g−1) | 2.926 | 2.990 |
| Pseudo-second-order | ||
| Q e,cal (mg g−1) | 305.14 | 736.16 |
| K 2 (g mg−1 min−1) | 0.0005 | 0.0004 |
| t 1/2 (min) | 6.554 | 3.396 |
| R 2 | 0.998 | 0.998 |
| SD (mg g−1) | 6.997 | 8.645 |
| Avrami-fractional-order | ||
| K AV (min−1) | 0.177 | 1.023 |
| Q e,cal (mg g−1) | 286.62 | 711.19 |
| n AV | 0.463 | 0.104 |
| t 1/2 (min) | 8.424 | 6.486 |
| t 0.95 (min) | 36.756 | 28.228 |
| R 2 | 0.999 | 0.999 |
| SD (mg g−1) | 2.056 | 2.708 |
| Intraparticle diffusion model | ||
| K ip (mg g−1 min−1/2) | 24.02 | 49.34 |
| C (mg g−1) | 80.01 | 298.09 |
| R 2 | 0.744 | 0.616 |