Table 2: Cd2+ ions RE and qe at initial concentration of Cd2+ (20 mg/L) and different pH values by D. regia.
pH | Ce (mg/L) | Cd2+ ions | qe (mg/g) |
±SD | RE% ±SD | ±SD | |
2 | 16.69 ± 0.09 | 19.50 ± 0.12 | 0.65 ± 0.02 |
4 | 0.80 ± 0.01 | 96.00 ± 0.06 | 3.20 ± 0.13 |
5 | 2.14 ± 0.02 | 89.29 ± 0.14 | 2.98 ± 0.09 |
6 | 2.42 ± 0.05 | 87.88 ± 0.06 | 2.93 ± 0.04 |
7 | 1.51 ± 0.02 | 92.41 ± 0.15 | 3.08 ± 0.08 |
8 | 1.17 ± 0.03 | 93.10 ± 0.13 | 3.10 ± 0.09 |
10 | 1.82 ± 0.04 | 90.88 ± 0.19 | 3.03 ± 0.05 |