Table 2. Comparison of Different Adsorbents.
| adsorbent | metal ion | time | capacity (mg g–1) | isotherm | order of reaction | ref |
|---|---|---|---|---|---|---|
| chitosan-coated cotton fiber | Cu(II) | 15 h | 24,78 | L, F | (30) | |
| chitosan/perlite | Cu(II) | 24 h | 104.0 | L | (31) | |
| wood pulp citric acid | Cu(II) | 2 h | 23.70 | L | (32) | |
| sunflower stalk acrylonitrile | Cu(II) | 2 h | 39.0 | F | (33) | |
| carboxymethyl cellulose-based Na montmorillonite thermoresponsive nanocomposite hydrogel | Cu(II) | 48 h | 2.23 | pseudo-second | (34) | |
| carboxymethyl cellulose-based thermoresponsive nanocomposite hydrogel | Cu(II) | 48 h | 2.14 | pseudo-second | (34) | |
| chitosan/zeolite composite | Cu(II) | 1 h | 25.88 | L | pseudo-second | (35) |
| thiosemicarbazide carboxymethyl cellulose | Cu(II) | 30 min | 144.90 | L | pseudo-second | (13) |
| MTC | Cu(II) | 30 min | 106.3829 | L | pseudo-second | present work |
a
L, Langmuir; F, Freundlich.