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| Parameters | Initial Pb(ii) concentration (mg L−1) | Filling height (cm) | ||||
|---|---|---|---|---|---|---|
| 5 | 10 | 20 | 20 | 40 | 60 | |
| t b (min) | 410 | 280 | 344 | 48 | 280 | 630 |
| t s (min) | 927 | 855 | 695 | 418 | 855 | 1003 |
| q c (mg) | 491 | 844 | 1210 | 350 | 844 | 1277 |
| M (mg) | 736 | 1359 | 2210 | 664 | 1359 | 1594 |
| q (mg g−1) | 24.5 | 42.2 | 60.5 | 35.0 | 42.2 | 42.6 |
| V eff (L) | 147 | 135 | 110 | 66 | 135 | 159 |
| Y (%) | 66.7 | 62.1 | 54.7 | 52.7 | 62.1 | 80.1 |
