Table 3 Maximum adsorption capacity of some adsorbents for Cr(VI) ions removal.
Adsorbent | pH | Time (min) | Concentration of Cr (VI) (mg/l) | Adsorption capacity (mg/g) | Source |
|---|---|---|---|---|---|
Aluminum –magnesium mixed hydroxide | 2.5–5 | 90 | 200 | 105.3–112 | |
LDHNSs | 6 | 8 | 20–200 | 125.97 | |
maghemite nanoparticles | 2.5 | 15 | 50 | 19.2 | |
Fe3O4@C@MgAl-LDH | 6 | 60 | 100 | 152 | |
flowerlike α-Fe2O3 | 3 | 180 | 25 | 30 | |
Poly aniline-polyethylene glycol composite | 5 | 30 | 50 | 68.97 | |
Melaleucadiosmifolialeaf | 7 | 120 | 250 | 62.5 | |
Halloysite nanotubes | 3 | 30 | 50 | 6.9 | |
Zn/Al LDH | 5.2 | 15 | 2.00 | 10.23 | |
Zn/Al/Ala LDH | 5.2 | 15 | 2.00 | 12.25 | |
Ni/Fe LDH/GL | 5 | 30 | 50 | 136.05 | This study |
Ni/Fe LDH | 5 | 30 | 50 | 50.43 | This study |
