Initial Cr(VI) conc. (ppm) | Adsorbed unreduced Cr(VI) (%) in the gel | Adsorbed reduced Cr(III) (%) in the gel |
50 200 | 0 6 | 100 94 |
400 | 14 | 86 |
600 | 35 | 65 |
800 | 43 | 57 |
1000 | 42 | 58 |