Table 1.
Samples collected in this study
| City location | Dust sample (N = 189) | Climate character | ||
|---|---|---|---|---|
| Air conditioning filters (n = 75) | Floor (n = 114) | Positive samples (n, %) | ||
| To the south of Huaihe River | 44 | 62 | 35 (18.52%) | |
| Hefei | 6 | 9 | 5 (33.33%) | Subtropical monsoon climate |
| Wuhu | 7 | 8 | 6 (40%) | Subtropical humid monsoon climate |
| Lu’an | 7 | 10 | 5 (29.41%) | Subtropical monsoon climate |
| Chuzhou | 6 | 8 | 3 (21.43%) | Subtropical monsoon climate |
| Xuancheng | 6 | 9 | 5 (33.33%) | Subtropical monsoon climate |
| Anqing | 5 | 8 | 4(30.77%) | North subtropical humid monsoon climate |
| Huainan | 7 | 10 | 7 (41.18%) | Subtropical monsoon climate |
| To the north of Huaihe River | 31 | 52 | 14 (16.87%) | |
| Bengbu | 7 | 10 | 3 (17.65%) | A transitional climate from subtropical monsoon climate to temperate monsoon climate |
| Huaibei | 5 | 8 | 2 (15.38%) | Temperate monsoon climate |
| Suzhou | 6 | 12 | 3 (16.67%) | Temperate monsoon climate |
| Fuyang | 7 | 13 | 4 (20%) | Temperate monsoon climate |
| Bozhou | 6 | 9 | 2 (13.33%) | Temperate monsoon climate |