Table 8 Fluoride ion concentration (before and after defluoridation) of ground water samples
Sample number | Village name | C i (mg/l) (before defluoridation) | C f (mg/l) (after defluoridation) | % Removal |
|---|---|---|---|---|
| Â | Â | Â | With NVNC | Â |
1 | Sivapuram | 3.75 | 0.454 | 87.9 |
2 | Koppukonda | 3.82 | 0.554 | 85.5 |
3 | Thimmayapalem | 3.56 | 0.495 | 86.1 |
4 | Narasayapalem | 3.48 | 0.432 | 87.6 |
5 | Brahmanapalli | 4.27 | 0.743 | 82.6 |
6 | Mada manchipadu | 3.88 | 0.442 | 88.6 |
7 | Andugulapadu | 3.69 | 0.432 | 88.3 |
8 | Tsouta palem | 4.09 | 0.483 | 88.2 |
9 | Venkupalem | 3.37 | 0.377 | 88.8 |
10 | Nagulavaram | 3.28 | 0.538 | 83.6 |
11 | Peda kancherla | 3.68 | 0.545 | 85.2 |
12 | Narasarayani palem | 3.52 | 0.538 | 84.7 |
13 | Dondapadu | 3.95 | 0.545 | 86.2 |
14 | Vinukonda | 3.62 | 0.391 | 89.2 |
15 | Gokana konda | 4.21 | 0.531 | 87.4 |
16 | Enugupalem | 3.69 | 0.523 | 85.7 |
17 | Surepalli | 3.45 | 0.521 | 84.9 |
18 | Ummadivaram | 3.59 | 0.582 | 83.8 |
19 | Perumalla palli | 4.12 | 0.655 | 84.1 |
20 | Nayanipalem | 3.68 | 0.592 | 83.9 |
21 | Settupalli | 3.72 | 0.513 | 86.2 |
22 | Vithamrajupalli | 3.43 | 0.579 | 83.1 |
23 | Neelagangavaram | 3.49 | 0.520 | 85.1 |