Table 4 Comparison of maximum adsorption capacity of MB of CCF and DCCF to other adsorbent materials (at 298 K)
Adsorbent precursor | Maximum capacity (mg g− 1) | Reference |
|---|---|---|
Carbonized cigarette filter (CCF) | 212.8 | This work |
P and N co-doped cigarette filter (DCCF) | 303.0 | This work |
Banana peel | 227.2 | [28] |
Commercial activated carbon | 199.6 | [29] |
Coffee grounds | 181.8 | [30] |
Coconut leaves | 66.0 | [31] |
Sludge | 46.7 | [32] |
Rice husk | 33.9 | [33] |
Seed pod | 14.8 | [34] |