Table 4.
Comparison of adsorption capacity, pH, and equilibrium time of the present method with other methods for removal of CR by reported adsorbents.
| Adsorbentsa | qm (mg g–1) | pH | Equilibrium time (min) | Refernces |
|---|---|---|---|---|
| Cu-Ca-Al-LDH/gellan gum nanocomposite | 74–100 | 5.0 | 60 | This work |
| AuNPs-coated AC | 71.05 | 6.5 | 270 | 37 |
| AgNPs-coated AC | 64.80 | 6.5 | 270 | 37 |
| pTSA-Pani@GO-CNT | 66.66 | 5.0 | 300 | 38 |
| Neem leaf powder | 41.24 | 6.7 | 300 | 39 |
| Hollow ZnFe2O4 microspheres | 16.58 | 6.0 | 120 | 40 |
| Aspergillus niger biomass | 14.16 | 6.0 | 1800 | 41 |
| Modified Zeolite A | 21.11 | 7.0 | 90 | 42 |
| Montmorillonite | 714.28 | 2.0 | 40 | 43 |
| Kaolin | 5.44 | – | 24 h | 44 |
aNPs: nanoparticles; AC: activated carbon; pTSA: para toluene sulfonic acid; Pani: polyaniline; GO: graphene oxide; CNT: multiwalled carbon nanotube.