TABLE 2.
Comparison of the adsorption capacities of different adsorbents for Pb(II).
| Adsorbents | Adsorption conditions | qe (mg/g) | Ref. |
| Polyacrylic acid grafted magnetic chitosan | Initial concentration, 500 mg/L; adsorbent dosage, 0.5 g/L; pH 5.48 | 204.89 | Hu et al. (2020) |
| Spherical mesoporous silica | Initial concentration, 120 mg/L; adsorbent dosage, 1 g/L; pH 4 | 59.03 | Zhu et al. (2016) |
| Hierarchical MgFe2O4 microspheres | Initial concentration, 250 mg/L; adsorbent dosage, 0.5 g/L; pH 7 | 113.70 | Kang et al. (2015) |
| Halloysite/alginate nanocomposite beads | Initial concentration, 200 mg/L; pH 5 | 325.00 | Chiew et al. (2016) |
| Hydroxyapatite/chitosan porous materials | Initial concentration, 400 mg/L; pH 5.5 | 264.42 | Lei et al. (2015) |
| CS coated cotton fiber | Initial concentration, 2,072 mg/L; pH 6.5 | 101.53 | Zhang et al. (2008) |
| Amine functionalized rice husk magnetic nanoparticle biocomposites | Initial concentration, 350 mg/L; pH 5 | 680.19 | Nata et al. (2020) |
| Alginic acid (AmAA) | Initial concentration, 800 mg/L; pH = 5, adsorbent dose = 0.25 g/L; time = 30 min | 535.87 | Vaid et al. (2020) |
| Semi-IPN2 | Initial concentration, 1,150 mg/L; adsorbent dosage, 2 g/L; pH 5 | 568.99 | This work |
| Semi-IPN2 | Initial concentration, 3,200 mg/L; adsorbent dosage, 2 g/L; pH 5 | 784.97 | This work |