Table 3. The Maximum Adsorption Capacity of Pb(II) and Cd(II) Reported for Different Adsorbents.
| adsorbent | qmax (mg/g) [Pb(II)] | qmax (mg/g) [Cd(II)] | ref |
|---|---|---|---|
| green magnesium silicate hydrate | 83.33 | 59.52 | (40) |
| magnetic graphene oxide (α-Fe2O3/GO) | 83.30 | 35.50 | (36) |
| CoFe2O4-G | 142.8 | 105.3 | (25) |
| NiFe2O4-G | 111.1 | 74.62 | (25) |
| NiFe2O4 | 19.88 | 21.53 | (41) |
| CFSG | 238.1 | 14.97 | this work |
| clay honeycomb monoliths (illite–smectite and stevensite) | 1.20 | 4.60 | (42) |
| magnetized activated carbons (rape straw powder) | 253.2 | 73.30 | (43) |