Adsorption capacity of Cd(II) by various adsorbents | Adsorption capacity of Cr(VI) by various adsorbents | ||||
Adsorbent | Q0 (mg∙g−1) | Ref. | Adsorbent | Q0 (mg∙g−1) | Ref. |
Low-grade phosphate | 7.5 | Bentonite | 0.57 | ||
Fe-montmorillonite | 2.89 | Oak sawdust (Quercus coccifera) treated by HCl | 1.72 | ||
Kaolinite | 9.9 | Activated carbon (Merck)) | 0.09 | ||
Na-bentonite | 26.2 | Activated carbon (BDH) | 0.93 | ||
Red mud | 10.6 | Iron (III) hydroxide | 0.47 | ||
Bagasse fly ash | 2.0 | micellar compounds | 17.89 | ||
Ca-bentonite | 7.3 | Sawdust | 2.29 | ||
Natural Algerian bentonite | 13.17 | Present study | Natural Algerian bentonite | 12.61 | Present study |