Fig. 2. (A) Mineralization of ¹⁴C-polycyclic aromatic hydrocarbons (PAH) and (B) disappearance of native PAH in solid-phase treatments of clay soil II. (A) Mineralization of ¹⁴C-phenanthrene (circles), ¹⁴C-fluoranthene (triangles) and ¹⁴C-pyrene (squares). (B) Mean concentration of native PAH in soil before (black bars) and after (gray bars) treatment. Error bars correspond to one standard deviation of measurements in duplicate flasks. The detection limit for fluorene was 96 µg kg^–1. Abbreviations: Flne, Fluorene; Phe, phenanthrene; Ant, anthracene; Ftne, Fluoranthene; Pyr, pyrene; B(a)pyr, benzo(a)pyrene; Crys, chrysene.