Table 4. Comparison of AO-II Adsorption Capacities of Various Adsorbents.
| adsorbent | adsorption capacity from Langmuir adsorption model (mg/g) | initial dye concentration (mg/L) | contact time | refs |
|---|---|---|---|---|
| Mg/Al LDH | 224 | 50 | 3 days | (23) |
| calcined Mg/Al LDH | 602 | |||
| Mg/Al-LDH-NO3 | 947.1a | 7–1052 | 200 min | (27) |
| LDHs of compositions, Mg/Al, Cu/Al, Co/Al, Mg/Cu/Al, Mg/Co/Al, and Co/Cu/Al | 59.2–129.8 | 100–300 | 240 min | (32) |
| zirconium based chitosan microcomposite adsorbent | 926 | 50–300 at pH 2 | 600 min | (33) |
| acid and basic functionalised titanosilicate | 98 and 49 | 50–350 | 30 min | (34) |
| activated carbon | 329 | 300–2100 | 300 min | (35) |
| mesoporous carbon CMK-3 | 385 | |||
| ammonia tailored CMK-3 | 596 | |||
| Mg/Al HT cal | 634.4 | 0–5016 | 24 h | (36) |
| HT macro cal | 1521.2 | |||
| LDH/PEG-15 | 625.0 | 100–800 | 120 min | present work |
a
Value taken from the equilibrium adsorption study.