Table 5.
Filtering efficiency of CMs against PM2.5.
| S. N. | Cloth masks (CMs) | Without filtration (μg/m3) mean ± S.D | With filtration (μg/m3) mean ± S.D | TIL (%) | Efficiency (%) |
|---|---|---|---|---|---|
| 1. | CM 1 | 87.98 ± 6.84 | 73.15 ± 4 | 83 | 17 |
| 2. | CM 2 | 78.36 ± 8.17 | 61.41 ± 1.99 | 78 | 22 |
| 3. | CM 3 | 98.2 ± 6.65 | 71.26 ± 4.55 | 73 | 27 |
| 4. | CM 4 | 88.33 ± 18.69 | 72.08 ± 8.68 | 82 | 18 |
| 5. | CM 5 | 74.07 ± 11.42 | 67.98 ± 7.47 | 92 | 8 |
| 6. | CM 6 | 49.58 ± 1.6 | 43.93 ± 1.27 | 89 | 11 |
| 7. | CM 7 | 51.64 ± 1.56 | 48.15 ± 1.38 | 93 | 7 |
| 8. | CM 8 | 68.69 ± 3.05 | 62.87 ± 2.71 | 92 | 8 |
| 9. | CM 9 | 52.16 ± 2.24 | 48.28 ± 1.14 | 93 | 7 |
| 10. | CM 10 | 53.62 ± 4.3 | 49.64 ± 1.46 | 93 | 7 |
| 11. | CM 11 | 36.38 ± 19.92 | 30.56 ± 14.96 | 84 | 16 |
| 12. | CM 12 | 15.95 ± 2.6 | 14.75 ± 8.63 | 92 | 8 |
| 13. | CM 13 | 93.32 ± 26.34 | 89.52 ± 24.8 | 96 | 4 |
| 14. | CM 14 | 49.64 ± 5.75 | 35.15 ± 5.58 | 71 | 29 |
| 15. | CM 15 | 124.5 ± 115.76 | 111.6 ± 135.25 | 90 | 10 |
| 16. | CM 16 | 42.15 ± 10.31 | 37.8 ± 11.19 | 90 | 10 |