Table 2: Comparison of the adsorption capacity, contact time, and particle size of SCMNPs with similar adsorbents in removing of Cd(II).
Adsorbent |
Adsorption capacity mg/g |
Contact time |
Particle size of adsorbent |
Ref. |
Aluminosilicates |
42.7-57.9 |
20 h |
0.2-2.18 mm |
[27] |
Calcite |
18.52 |
10 min |
100 mesh |
[28] |
Chromite mine over burden |
22.47 |
30 min |
- |
[29] |
Iron ore slime |
34.75 |
- |
- |
[30] |
Low grade manganese ore |
59.17 |
7 h |
0.152 mm |
[31] |
Manganese nodule residue |
21.2 |
1h |
150 Mesh B.S.S passed Particles (100% < - 100 μm) |
[32] |
Nickel laterite (high iron) |
13.2 |
1 h |
100% < 100 µm (-150 mesh ) |
[33] |
Nickel laterite (low iron) |
11 |
1 h |
100% < 100 µm (-150 mesh ) |
[33] |
Nickel, leaching residue |
25 |
- |
Smaller than 20 µm |
[34] |
Palygorskite |
4.54 |
1 h |
200 mesh |
[35] |
Perlite |
0.64 |
6 h |
1.7 mm |
[36] |
Red bauxite |
38.77 |
- |
- |
[32] |
Silica, mesoporous |
111.3 ± 3.3 |
1 h |
2-50 nm |
[37] |
Silicate MCM-41, mesoporous |
100 |
1 h |
2-50 nm |
[37] |
Oxidized MWCNTs |
25.7 |
45 min |
Outer diameters = 20-30 nm Inner diameters = 5-10 nm Length between 5 and 200 µm |
[38] |
SCMNPs |
260.11 |
10 min |
11.7-24.81 nm |
Current study |