Grimalt Joan O, van Drooge Barend L, Ribes Alejandra, Fernández Pilar, Appleby Peter
Department of Environmental Chemistry, Institute of Chemical and Environmental Research (ICER-CSIC), Jordi Girona 18-26, 08034 Barcelona, Catalonia, Spain.
Environ Pollut. 2004 Sep;131(1):13-24. doi: 10.1016/j.envpol.2004.02.024.
Polycyclic aromatic hydrocarbons (PAH) in lake sediments and nearby soils of two European high mountain regions, Pyrenees and Tatra, have been studied. Similar mixtures of parent PAH were observed in all cases, indicating predominance of airborne transported combustion products. Nevertheless, the composition of these atmospherically long-range transported PAH was better preserved in the superficial layers of soils than sediments. This difference points to significant PAH degradation process, e.g. during lake water column transport, before accumulation in the latter. Post-depositional transformation was also different in both types of environmental compartments. Thus, lake sediments exhibit higher preservation of the more labile PAH involving lower degree of post-depositional oxidation. However, they also show the formation of major amounts of perylene by diagenetic transformation in the deep sections. This compound is not formed in soils where downcore enrichments of phenanthrene are observed, probably as a consequence of diagenetic aromatization of diterpenoids.
对欧洲两个高山地区——比利牛斯山脉和塔特拉山脉的湖泊沉积物及附近土壤中的多环芳烃（PAH）进行了研究。在所有情况下均观察到母体多环芳烃的类似混合物，这表明空气传播的燃烧产物占主导地位。然而，这些经大气长距离传输的多环芳烃的组成在土壤表层比在沉积物中保存得更好。这种差异表明存在显著的多环芳烃降解过程，例如在湖泊水柱传输过程中，然后才在沉积物中积累。两种环境隔室中的沉积后转化也有所不同。因此，湖泊沉积物对更不稳定的多环芳烃具有更高的保存度，沉积后氧化程度较低。然而，它们在深部区域也显示出通过成岩转化形成大量苝。这种化合物在土壤中未形成，在土壤中观察到菲在岩芯下部富集，这可能是二萜类化合物成岩芳构化的结果。
