Table 3.
Three-year average concentrations of metals in PM2.5 (ng/m3).
Metals | Mean ± SD | IQR | Max | Min |
---|---|---|---|---|
Al | 231.756 ± 58.300 | 78.303 | 314.679 | 159.039 |
Cr | 7.844 ± 3.523 | 2.782 | 13.897 | 5.292 |
Mn | 27.935 ± 4.178 | 2.823 | 34.845 | 23.603 |
Ni | 2.030 ± 0.405 | 0.276 | 2.728 | 1.726 |
As | 6.182 ± 0.561 | 0.784 | 6.805 | 5.350 |
Se | 2.794 ± 0.336 | 0.337 | 3.226 | 2.290 |
Cd | 1.256 ± 0.149 | 0.275 | 1.420 | 1.084 |
Sb | 2.064 ± 0.294 | 0.352 | 2.466 | 1.658 |
Tl | 0.400 ± 0.032 | 0.028 | 0.453 | 0.367 |
Pb | 35.327 ± 19.174 | 11.900 | 48.081 | 2.167 |
Abbreviations: PM2.5: particle with aerodynamic diameter ≤2.5 μm; Al: Aluminum; Cr: Chromium; Mn: Manganese; Ni: Nickel; As: Arsenic; Se: Selenium; Cd: Cadmium; Sb: Antimony; Tl: Thallium; Pb: Lead.