Table 4.
Various adsorbents and their sorptive removal of roxarsone calculated according to As5+ content.
| Adsorbent Material | Conditions (Co in [As5+]) | Uptake (As5+, mg/g) | Reference |
|---|---|---|---|
| Multi-walled carbon nanotubes (MWCNTs) | pH 2–12; 10 °C; Co: 50 mL of 5–40 ppm (equilibrium), 10–40 ppm (kinetic); 100 mg adsorbent |
3.65–3.85 (equilibrium) 0.997–2.88 (kinetics) |
[44] |
| Goethite | pH 5–9; 23 °C; 24 h; Co: 3.7 ppm; 45 mg adsoebent /L |
0.283–0.0883 (kinetics) | [45] |
| Mag-P |
Equilibrium pH 7.0 buffer; 24 h; 21 °C; Co: 20 mL of 6.56–263 ppm; 15 mg adsorbent Kinetic pH 7.0 buffer; 24 h; 21 °C; Co: 200 mL of 47.3 ppm; 30 mg adsorbent |
37.5 (equilibrium) 8.24 (kinetics) |
This study |
| Mag-C | – | 8.39 (equilibrium) 6.07 (kinetics) |
– |
| CM-32 | – | 64.6 (equilibrium) | – |
| CM-19 | – | 72.4 (equilibrium) 19.3 (kinetics) |
– |
| NORIT ROX 0.8 (GAC) |
– | 134 (equilibrium) 56.1 (kinetics) |
– |
| Goethite | – | 119 (equilibrium) 18.2 (kinetics) |
– |