Table 11.
Adsorption capacities (AC) and other parameters for the removal of fluoride by Apatite and hydroxyapatite
| Adsorbent | AC (mg/g) | AD (g/L) | CR (mg/L) | pH | Ref. |
|---|---|---|---|---|---|
| Synthetic nano hydroxyapatite |
4.575 |
4 |
3-80 |
5-6 |
[113] |
| Biogenic apatite |
4.99 |
|
|
|
|
| Treated biogenic apatite |
6.849 |
|
|
|
|
| Geogenic apatite |
0.014 |
|
|
|
|
| Hydroxyapatite |
1.432 |
20 |
3-80 |
5 |
[114] |
| Nano sized hydroxyapatite |
3.44 |
0.2 |
50 |
5 |
[116] |
| Cellulose@hydroxyapatite nanocomposites |
4.2 |
4 |
10 |
6.5 |
[117] |
| Al-modified hydroxyapatite (Al-HAP) |
32.57 |
0.5 |
5-50 |
7 |
[118] |
| nHAp derived from PG | 19.74-40.81 | 1 | 10-50 | 2-11 | [119] |