Table 1.
Descriptive statistics [ppb].
| Compound | Minimum | Mean | Median | Maximum | Standard deviation | Skewness | Estimated annual flow (kg) | Hinwil* (Morf et al. 2013) | Northern Italy* (Funari et al. 2015) | Other studies* (Astrup et al. 2016) | Earth’s crust content* (Haynes 1942) | IBA Enrichment factors* (Buat-Menard & Chesselet 1979) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ag | 817.0 | 6,973.0 | 2,154.0 | 100,980.0 | 16,033.8 | 4.5 | 348.7 | 5,300 | 5,510 | < 290 – 36,900 | 75 | 29 |
| Au | 12.7 | 313.9 | 47.1 | 7,281.6 | 1,171.9 | 5.0 | 15.7 | 400 | 410 | < 110 – 2,200 | 4 | 12 |
| Pd | 1.4 | 41.3 | 18.0 | 731.0 | 102.4 | 5.9 | 2.1 | NA | NA | 800–1,000 | 15 | 1 |
| Pt | 5.0 | 13.8 | 10.0 | 80.0 | 12.8 | 3.4 | 0.7 | 59 | NA | 74 – 530 | 5 | 2 |