Table 2.
PM2.5 mass (µg/m3) and species concentrations (ng/m3).
| PM2.5 species | December 31, 2012-January 1, 2013 | January 2, 2013-January 3, 2013 |
|---|---|---|
| Mass | 104.9 | 103.7 |
| Cl− | 1983.5 | 1160.5 |
| NO3 − | 2547.1 | 1502.4 |
| SO4 2− | 3542.0 | 1381.7 |
| Na+ | 445.4 | 198.7 |
| NH4 + | 141.3 | 97.6 |
| K+ | 2705.4 | 1803.4 |
| Ca2+ | 2409.5 | 959.2 |
| Mg2+ | 222.5 | 125.8 |
| Al | 5450.9 | 4097.6 |
| Si | 9756.6 | 6739.5 |
| Ca | 3356.8 | 1628.8 |
| Ti | 779.2 | 491.7 |
| Fe | 7616.0 | 5400.2 |
| V | 10.3 | 7.9 |
| Ni | 3.2 | 11.1 |
| K | 2969.2 | 1976.1 |
| Se | 0.0 | 0.7 |
| Cl | 1958.7 | 1047.5 |
| Br | 40.9 | 28.3 |
| As | 7.8 | 2.3 |
| Pb | 22.9 | 18.6 |
| Zn | 90.0 | 79.4 |
| S | 1311.7 | 632.7 |