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