Table 1.
Study of the Cr(VI) removal from solution by various monoliths.a Concentrations are given in ppm.
| Gel Used | Initial Conc. | Final Conc. | % Removed |
|---|---|---|---|
| Blank Gels | 19.6 | 18.7 ± 0.9 | 4.5 ± 0.5% |
| Pyridine-Functionalized Batch 1 | 20.7 | 4.7 ± 0.3 | 77.3 ± 1.4% |
| Pyridine-Functionalized Batch 2 | 20.6 | 3.8 ± 0.1 | 81.7 ± 0.5% |
| Pyridine-Functionalized Batch 3 | 20.7 | 4.3 ± 0.2 | 79.1 ± 1.1% |
a
Each monolith was immersed in 5 mL of Cr(VI)/0.1 M HCl solution for 5 hours. The values given are based on measurements of three gels from each batch.