Table 3.
Sorbent recycling-Sorption and desorption efficiencies for 5 successive cycles
| Sorption | Desorption | ||||
|---|---|---|---|---|---|
| Sorbent | Cycle | Sorption Efficiency (%) | Std. Dev. | Desorption Efficiency (%) | Std. Dev. |
| PGG@C | 1 | 97.0 | 0.1 | 100.0 | 0.0 |
| 2 | 95.9 | 0.1 | 99.9 | 0.0 | |
| 3 | 94.1 | 0.2 | 100.0 | 0.1 | |
| 4 | 93.1 | 0.2 | 99.5 | 0.5 | |
| 5 | 92.2 [−5%] | 0.1 | 98.9 | 0.3 | |
| PGG@MC | 1 | 89.9 | 0.6 | 99.6 | 0.0 |
| 2 | 89.1 | 0.4 | 100.0 | 0.0 | |
| 3 | 87.5 | 1.0 | 100.3 | 0.4 | |
| 4 | 85.5 | 0.6 | 100.1 | 0.0 | |
| 5 | 84.6 [−6%] | 1.1 | 99.7 | 0.3 | |
Sorption: C0: 0.42 mmol U L−1; pH0: 4; SD: 833 mg L−1; time: 24 h; T: 21 ± 1 °C. Desorption: 0.2 M HCl eluent; SD: 2.5 g L−1; time: 2 h; T: 21 ± 1 °C.