Table 2.
Concentrations of metals for total, respirable and NPM fractions of the collected particles in the foundry. The concentrations were calculated by adding concentration multiplied by the corresponding fraction of each of the nanoMOUDI stages.
| Element | Day 1 | Day 2 | Day 3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Collected, μg/m3 | Respirable, μg/m3 | NPM, μg/m3 | Collected, μg/m3 | Respirable, μg/m3 | NPM, μg/m3 | Collected, μg/m3 | Respirable, μg/m3 | NPM, μg/m3 | |
| Al | 7.4 | 1.5 | 0.1 | 14.7 | 2.6 | 0.2 | 14.0 | 2.1 | 0.1 |
| Mn | 2.3 | 0.3 | 0.0 | 3.6 | 0.8 | 0.1 | 16.1 | 8.2 | 1.3 |
| Fe | 326.1 | 35.2 | 2.2 | 156.3 | 29.5 | 3.2 | 444.9 | 101.3 | 10.9 |
| Cu | 0.5 | 0.0 | 0.0 | 0.9 | 0.7 | 0.1 | 1.2 | 0.6 | 0.1 |
| Zn | 0.3 | 0.0 | 0.0 | 8.8 | 6.9 | 2.4 | 7.4 | 4.3 | 0.6 |
| Total | 336.6 | 36.9 | 2.3 | 184.3 | 40.5 | 5.9 | 483.6 | 116.5 | 13.1 |
NPM = nanoparticulate matter