Table 2 A comparison of maximum sorption capacities (qmax) (mg∙g−1) for Cd(II) ions by various sorbents under room temperature (20–25 °C).
From: Characteristics of Cadmium Sorption by Heat-Activated Red Mud in Aqueous Solution
Sorbent | q max | Sorbent | q max |
|---|---|---|---|
Coal fly ash41 | 0.089 | β-cyclodextrin polymers42 | 136.43 |
Lignin43 | 25.40 | Multi-functional cotton fiber44 | 182.27 |
Kraft lignin45 | 8.21 | Magnetic iron oxide nanoparticles loaded sawdust carbon46 | 51 |
NaOH-treated fly ash47 | 30.21 | EDTA modified Fe3O4/sawdust carbon nanocomposites46 | 63.3 |
Iron oxide activated red mud14 | 0.116 | Alumina nanoparticles48 | 1.86 |
TiO2/fly ash49 | 35.80 | Glycerol-modified alumina48 | 0.67 |
Acidified red mud50 | 12.07 | Synthetic mineral51 | 47 |
Balling milling nano-particle red mud9 | 23.61 | Amino-functionalized activated carbon52 | 79.2 |
Acidified red mud9 | 21.36 | Thiol-functionalized activated carbon52 | 130.05 |
Original red mud9 | 17.99 | Magnesium silicate-hydrothermal carbon53 | 108 |
Heat-activated red mud (This work) | 42.74 |
