Click on image to view larger version.
Fig. 3. Degradation curves measured on the landfarm Kreekraksluizen. (A) Polycyclic aromatic hydrocarbons (PAHs) (Dutch National List) in Petroleum Harbor sediment (upper layer of vegetated sediment). Individual measurements, fitted with two exponential functions (rapid and slow degradation). Mind the logarithmic scale. (B) Mineral oil in the vegetated Petroleum Harbor landfarm (upper layer and lower layer). Presented data are the average concentration per sampling date. (C) PAHs in Geul Harbor sediment. 95% confidence values are given, fitted with two exponential functions (slow and very slow degradation).
