Table 1.
The content of trace elements in sewage sludge for Ireland, Italy, Russia, China and Canada.
| Trace element | unit | The range of value from UE countriesa | The limit value [Directive 86/278/EEC] | Measured values in: |
||||
|---|---|---|---|---|---|---|---|---|
| Irelandb | Italyc | Russiad | Chinae | Canadaf | ||||
| Al | % | 0.1–60 | not limited | – | – | – | – | – |
| Fe | % | 0.2–14.9 | not limited | – | – | – | – | – |
| Zn | % | 0.0–0.1 | 0.25–0.4 | 0.08 | 0.02–0.09 | 0.07–0.08 | 2.42 | 0.03 |
| Cd | mg/kg DM | 0.3–5.1 | 20–40 | 12 | 0.3–0.9 | 1.65 | 1.1 | |
| Cu | mg/kg DM | 27.3–578.1 | 1000–1750 | 520 | 90–206 | 200–300 | 3323 | 271 |
| Hg | mg/kg DM | 0.1–1.1 | 16–25 | not detected | 0.2–0.9 | 11.35 | – | 0.68 |
| Ni | mg/kg DM | 8.6–310 | 300–400 | 18 | 11–15 | 75–77 | 422 | 10.5 |
| Pb | mg/kg DM | 4.0–429.8 | 750–1200 | 252 | 80–126 | 34.7 | 69.7 | 24 |
| Ag | mg/kg DM | 0.1–14.7 | not limited | – | – | – | – | – |
| Ba | mg/kg DM | 41.5–579.9 | not limited | – | – | – | – | – |
| Mn | mg/kg DM | 75.2–959.7 | not limited | – | 103–566 | – | – | – |
| Ti | mg/kg DM | 65.2–1070.9 | not limited | – | – | – | – | – |
| V | mg/kg DM | 2.3–135.4 | not limited | – | – | – | – | – |
| As | mg/kg DM | 5.6–56.1 | not limited | not detected | – | – | – | – |
| Co | mg/kg DM | 1.5–16.7 | not limited | – | – | – | – | 2.9 |
| Cr | mg/kg DM | 10.8–1542.2 | not limited | 35 | 18–65 | 305–310 | 1983 | 20.3 |
| Mo | mg/kg DM | 1.7–12.5 | not limited | 5 | – | – | – | 3.5 |
| Se | mg/kg DM | 3.4–53.6 | not limited | 3 | – | – | – | 2.15 |