Table 1.
Adsorption of heavy metal ions by different adsorbents.
| Adsorbent | qm (mg/g) | References | ||
|---|---|---|---|---|
| Pb2+ | Cr3+ | Cu2+ | ||
| Licorice/epichlorohydrin | 591.75 | 583.5 | 134.25 | Present study |
| Chitosan/calcium alginate/bentonite | 434.89 | - | 115.30 | [62] |
| Chitosan/poly(N-isopropylacrylamide) | 172.0 | - | 115.1 | [63] |
| Chitosan/polyvinyl alcohol | - | - | 62.1 | [64] |
| Spirodela polyrhiza/epichlorohydrin | 51.75 | - | - | [65] |
| N,N-dimethylformamide | ||||
| Carboxymethyl cellulose/attapulgite/acrylic acid-co-acrylamide | - | 74.8 | - | [66] |
| Cellulose/epichlorohydrin/graphene oxide | - | - | 94.34 | [9] |
| Tea residue/acrylic acid | 253.16 | 206.1 | - | [67] |
| Carboxymethyl cellulose/epichlorohydrin/polyacrylamide | - | - | 75.93 | [68] |
| Silica/poly(N-isopropylacrylamide) | ||||
| N,N′-methylenebis-acrylamide | - | 243.9 | - | [69] |