Pyrene and chrysene fate in surface soil and sand microcosms.

摘要: Polycyclic aromatic hydrocarbons (PAHs) are major components of wastes from municipal gas plants and many wood preservatives. Soil contaminated with these is a potential threat to human health because the carcinogenicity PAHs. This study follows fate two four-ring PAHs, pyrene chrysene, in three matrices: an adapted soil (obtained site PAHs for more than 75 years), uncontaminated (with without inoculum soil), sand mixed soil. Radiolabeled pyrene, salicylic acid (a metabolite PAH biodegradation) were used trace mineralization, transformation, extractability, formation unextractable residual over time. Linear approximations rates processes made. High-performance liquid chromatography (HPLC) analysis extracts inoculated showed transient known metabolites: 1-hydroxypyrene (from pyrene) 1-hydroxy-2-naphthoic chrysene). The amount extractable label diminished steadily course systems that not inhibited sodium azide, whereas remained relatively constant systems. Correspondingly, nonextractable generally increased during each incubation uninhibited systems, this In contrast, rate extent mineralization varied widely across matrix types. suggests alterations impact extractability common, contrast which was apparently limited communities.