Table 2. Comparison of Metal Ion Adsorption among Different Hydrogel Adsorbents.
| hydrogel adsorbents | metal ion | Qe (mg·g–1) | references |
|---|---|---|---|
| P(AMPS-co-IA) | Pb2+ | 360 | Çavuş et al. (2009)25 |
| m-chitosan/PVA/CCNFs | Pb2+ | 171 | Zhou et al. (2014)26 |
| m-chitosan/PVA | Pb2+ | 117 | Zhou et al. (2014)26 |
| Gg-cl-P(AAm-co-AN) | Pb2+, Cu2+ | 385, 204 | Mittal et al. (2015)27 |
| P(AANa-co-AM)/GO | Pb2+, Cd2+ | 452, 196 | He et al. (2016)19 |
| CTS-g-PAA | Cu2+, Pb2+ | 300, 600 | Zhu et al. (2016)9 |
| Jute/PAA | Cd2+, Pb2+ | 401, 542 | Zhou et al. (2017)28 |
| CMC/PAM composite hydrogel | Pb2+, Cd2+ | 312, 256 | Godiya et al. (2019)29 |