Table 1.
Annual concentrations of 16 PAHs in PM2.5 at sampling site
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | |
|---|---|---|---|---|---|---|
| PM2.5 (μg/m3) | 64.3 (34.9–86.2) | 50.6 (33.2–70.4) | 57.9 (39.3–80.8) | 44.4 (31.7–62.8) | 38.9 (27.5–50.8) | 34.0 (21.3–54.7) |
| Nap (ng/m3) | 0.13 (0.13–0.13) | 0.13 (0.13–0.13) | 0.13 (0.13–0.13) | 0.13 (0.13–0.13) | 0.13 (0.13–0.13) | 0.13 (0.13–0.13) |
| Acy (ng/m3) | 0.08 (0.08–0.08) | 0.08 (0.08–0.08) | 0.08 (0.08–0.08) | 0.08 (0.08–0.08) | 0.08 (0.08–0.08) | 0.08 (0.08–0.08) |
| Flu (ng/m3) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) |
| Ace (ng/m3) | 0.23 (0.05–0.41) | 0.22 (0.17–0.35) | 0.17 (0.05–0.31) | 0.05 (0.05–0.13) | 0.05 (0.05–0.05) | 0.05 (0.05–0.05) |
| Phe (ng/m3) | 0.06 (0.06–1.49) | 0.88 (0.17–1.28) | 1.00 (0.67–1.28) | 0.42 (0.06–1.10) | 0.06 (0.06–0.31) | 0.84 (0.44–1.51) |
| Ant (ng/m3) | 0.05 (0.05–0.23) | 0.05 (0.05–0.39) | 0.05 (0.05–0.51) | 0.05 (0.05–0.05) | 0.09 (0.05–0.55) | 0.24 (0.07–0.43) |
| Fla (ng/m3) | 0.05 (0.05–0.05) | 0.05 (0.05–0.05) | 0.05 (0.05–0.05) | 0.05 (0.05–0.05) | 0.05 (0.05–0.05) | 0.05 (0.05–05) |
| Pyr (ng/m3) | 0.03 (0.03–1.59) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–1.02) |
| Chr (ng/m3) | 0.04 (0.04–0.97) | 0.70 (0.04–1.42) | 0.49 (0.04–0.78) | 0.04 (0.04–0.09) | 0.04 (0.04–0.09) | 0.04 (0.04–0.04) |
| Baa (ng/m3) | 0.03 (0.03–1.67) | 1.15 (0.03–2.04) | 0.46 (0.03–0.98) | 0.03 (0.03–0.36) | 0.03 (0.03–0.22) | 0.03 (0.03–0.03) |
| Bbf (ng/m3) | 0.03 (0.03–0.03) | 0.03 (0.03–0.64) | 0.03 (0.03–1.37) | 1.11 (0.69–2.03) | 0.36 (0.18–1.59) | 0.28 (0.14–0.72) |
| Bkf (ng/m3) | 3.35 (3.35–4.62) | 2.27 (0.89–2.99) | 2.21 (1.45–2.80) | 1.33 (0.82–3.07) | 0.13 (0.07–1.26) | 0.10 (0.06–0.26) |
| BaP (ng/m3) | 0.03 (0.03–0.73) | 0.37 (0.03–1.69) | 0.27 (0.21–0.65) | 0.16 (0.09–0.30) | 0.15 (0.07–0.29) | 0.08 (0.03–0.29) |
| Dah (ng/m3) | 0.03 (0.03–0.35) | 0.03 (0.03–0.73) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.03) | 0.03 (0.03–0.05) |
| Bghi (ng/m3) | 1.27 (1.27–3.13) | 1.63 (0.13–3.03) | 1.23 (0.83–1.58) | 0.54 (0.31–1.00) | 0.36 (0.21–0.84) | 0.58 (0.30–1.45) |
| Ind (ng/m3) | 0.04 (0.04–0.04) | 0.04 (0.04–2.34) | 0.04 (0.04–0.04) | 0.04 (0.04–0.04) | 0.04 (0.04–0.04) | 0.04 (0.04–0.04) |
| ∑PAHs (ng/m3) | 5.27 (5.27–14.4) | 8.39 (0.43–17.8) | 7.06 (5.90–12.43) | 5.05 (3.33–9.18) | 3.14 (1.70–5.26) | 4.22 (2.70–5.12) |
| Rainfall (mm/h) | 0.02 (0.00–3.10) | 0.01 (0.00–1.67) | 0.00 (0.00–1.50) | 0.01 (0.00–4.20) | 0.02 (0.00–2.60) | 0.05 (0.00–1.68) |