Reusability and recycling of the SiPy adsorbent toward Cu(ii) in the adsorption–desorption cycles.
| Cycle | q e (mg g−1) of Cu(ii) adsorbed on SiPy |
|---|---|
| 1 | 90.25 |
| 2 | 89.45 |
| 3 | 88.02 |
| 4 | 86.13 |
| 5 | 84.67 |
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