Table 1 Descriptive statistics of the concentrationsa of indoor air pollutants and meteorological dataa in the studied coffee shops.
Shop A (N = 20) | Shop B (N = 44) | Shop C (N = 95) | Shop D (N = 83) | |||||
|---|---|---|---|---|---|---|---|---|
Range | Mean ± SD | Range | Mean ± SD | Range | Mean ± SD | Range | Mean ± SD | |
PM10 (μg/m3) | 2.3–140.9 | 10.7 ± 30.6 | 6.6–80.1 | 23.2 ± 14.1 | 7.5–161.3 | 44.2 ± 44.8 | 4.0–57.2 | 13.2 ± 8.0 |
PM2.5–10 (μg/m3) | 0.3–138.3 | 7.6 ± 30.7 | 3.9–72.0 | 13.7 ± 12.3 | 2.0–18.1 | 6.5 ± 3.2 | 1.6–13.0 | 5.1 ± 2.1 |
PM2.5 (μg/m3) | 1.7–5.4 | 3.1 ± 1.0 | 2.7–17.9 | 9.5 ± 4.9 | 3.9–152.4 | 35.8 ± 41.9 | 1.9–48.7 | 8.1 ± 6.8 |
Total VOCs (ppm) | NA | NA | 0.1–0.3 | 0.1 ± 0.0 | 0.0–1.5 | 0.3 ± 0.4 | 0.1–0.8 | 0.2 ± 0.1 |
p-PAHs (ng/m3) | NA | NA | NA | NA | 2.6–193.7 | 20.5 ± 29.3 | 6.6–24.5 | 12.4 ± 3.7 |
CO (ppm) | ND | ND | ND-4.9 | 0.9 ± 1.4 | 0.0–4.0 | 0.5 ± 1.0 | ND | ND |
CO2 (ppm) | 679.6–1626.8 | 785.8 ± 201.5 | 475.0–838.8 | 590.1 ± 93.4 | 442.7–1774.9 | 771.6 ± 309.2 | 543.3–1607.4 | 895.4 ± 245.2 |
Temperature (°C) | 21.8–24.6 | 23.6 ± 0.8 | 21.5–24.1 | 23.3 ± 0.6 | 19.9–25.4 | 22.7 ± 1.3 | 20.0–25.8 | 22.5 ± 1.7 |
RH (%) | 70.3–80.8 | 75.7 ± 3.3 | 53.8–80.4 | 67.5 ± 8.2 | 53.0–73.6 | 65.6 ± 5.7 | 64.5–81.2 | 71.7 ± 4.6 |
