Table 3.
Maximum amount of absorbed 2,4 D per gram of sorbent phase (qe); absorption efficiency (AE) and desorption efficiency (DE); rate constant of pseudo-second-order adsorption (K2); theoretical absorption capacity from pseudo-second-order model (qe,cal); correlation coefficient (R2).
| Sample | qe,exp (mg/g) | AE (%) | DE (%) | K2 (g·mg−1·min−1) | qe,cal (mg/g) | R2 |
|---|---|---|---|---|---|---|
| CS_GMA | 4.2 ± 0.2 | 39 ± 3 | 65 ± 1 | 0.03422 | 4.4 | 0.9921 |
| CS_GMA_1.3 | 4.0 ± 0.1 | 41 ± 1 | 45 ± 2 | 0.06972 | 4.1 | 0.9953 |
| CS_GMA_2.5 | 2.2 ± 0.1 | 21 ± 1 | 95 ± 5 | 0.02139 | 2.4 | 0.9177 |
| CS_GMA_5 | 3.4 ± 0.1 | 34 ± 4 | 64 ± 1 | 0.01205 | 3.8 | 0.9349 |
| CS_ITA | 3.0 ± 0.2 | 30 ± 1 | 66 ± 4 | 0.11756 | 3.1 | 0.9892 |
| CS_ITA_2.5 | 2.6 ± 0.2 | 29 ± 1 | 54 ± 4 | 0.03117 | 2.8 | 0.9785 |
| CS_ITA_5 | 2.4 ± 0.4 | 24 ± 2 | 72 ± 5 | 0.09963 | 2.4 | 0.9924 |
| CS_ITA_9.5 | 2.3 ± 0.2 | 23 ± 1 | 66 ± 3 | 0.23976 | 2.4 | 0.9975 |