Table 2 Half-livesa (DT50) of pelargonic acid in subsoils from railway tracks and agricultural topsoils
Starting concentration | 5 mg/kg | 15 mg/kg | ||||
|---|---|---|---|---|---|---|
water content [% WHC] | DT50 [h] | 95% CIb | water content [% WHC] | DT50 [h] | 95% CIb | |
Subsoils from railway tracks | ||||||
Lanzenhäusern | 62 | 2.3 | (2.0–2.8) | 54 | 10.5 | (8.7–13.2) |
Nottwil | 48 | 0.99 | (0.76–1.41) | 44 | 3.7 | (2.7–5.7) |
Wabern | 67 | 2.0 | (1.4–3.4) | 51 | 4.9 | (4.1–6.2) |
Geom. mean for railway soils | 1.7 | 5.8 (0.24 d) | ||||
Agricultural topsoils | ||||||
Brislach | 60 | 0.15 | (0.11–0.24) | 38 | 1.2 | (1.1–1.4) |
Möhlin | 72 | 0.16 | (0.15–0.17) | 49 | 1.8 | (1.4–2.7) |
Sargans | 58 | 0.20 | (0.18–0.23) | 49 | 1.3 | (1.0–1.6) |
Zuzwil | 58 | 0.17 | (0.15–0.20) | 37 | 1.5 | (1.2–1.9) |
Geom. mean for agricultural soils | 0.17 | 1.4 | ||||
DT50 value used for exposure modelling in the EU: range 0.70–1.58 days (n = 4) c | 29.3 (1.22 d) | |||||