Comparison of CMBCs' Pb2+ adsorption capacity with those of pine wood, bamboo, potato peel biochar, chitosan, and activated carbon (carbon F-400).
| Adsorbent | pH | Temp. (K) | Conc. range (mg L−1) | Surface area (m2 g−1) | Pb2+ adsorption capacity (mg g−1) | Pb2+ adsorption capacity (mg m−2) | Ref. |
|---|---|---|---|---|---|---|---|
| Chitosan-modified pine wood biochar (CMBC) | 5.0 | 298 | 50–350 | 7.13 | 50.5 | 7.08 | This study |
| 308 | 103 | 14.4 | |||||
| 318 | 134 | 18.8 | |||||
| Non-modified pine wood biochar (NMBC) | 5.0 | 318 | 10–350 | 10.5 | 48.2 | 4.59 | This study |
| Chitosan-modified bamboo biochar (BB-C) | 5.5 | 298 | 2–100 | 166.9 | 14.3 | 0.085 | 34 |
| Chitosan-modified potato peel biochar | Not available | Not available | Not available | Not available | 0.147 | — | 40 |
| Chitosan and pyromellitic- modified rice straw biochar (CPMB) | 5 | 298 | 5–500 | 62.6 | 9.24 | 0.15 | 39 |
| 303 | 11.91 | 0.19 | |||||
| 308 | 13.93 | 0.22 | |||||
| Chitosan | 4.5 | 293 | 10–1000 | Not available | 0.558 (mmol g−1) | — | 61 |
| Carbon F-400 | 5.0 | 278 | 0.125–100 | 984 | 44.3 | 0.0450 | 2 |
| 298 | 30.1 | 0.0306 | |||||
| 323 | 25.2 | 0.0256 |