School of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK.
J Hazard Mater. 2011 Sep 15;192(3):1219-25. doi: 10.1016/j.jhazmat.2011.06.033. Epub 2011 Jul 13.
A comparison was made between the dissipation of polycyclic aromatic hydrocarbons (PAHs) in soil freshly spiked with pure PAHs, soil spiked with a coal tar mixture and a contaminated soil from a former coking works where the PAHs had been present for more than a century. The potential of five selected plant species for phytoremediation was investigated. The levels of all 7 PAHs in chemically amended soil, both planted and unplanted, fell significantly (>80% reduction) over the 12 weeks of the growing trial. In the coal tar treated soils all PAHs were significantly reduced. In both the planted and unplanted soils the 2-3 ringed compounds demonstrated much greater loss (>77%) than the 4-6 ringed (16-39%). The 3-4 ringed compounds demonstrated strong evidence of phytoremediation but not the 5-6 ringed. The coking soil showed limited reduction (7-24%) of all 12 PAHs present. There was little difference in dissipation between the PAHs and little evidence of a phytoremediation effect in coking soil. The results demonstrated that the form in which PAHs were added to soil influenced their susceptibility to dissipation. Therefore, predictions of PAH dissipation from laboratory amended soil do not reflect the true situation in the field.
对新添加纯多环芳烃、添加煤焦油混合物的土壤以及一个前焦化厂污染土壤中多环芳烃的消散进行了比较，该焦化厂的多环芳烃已经存在了一个多世纪。研究了 5 种选定植物物种用于植物修复的潜力。在生长试验的 12 周内，化学添加土壤（种植和未种植）中所有 7 种 PAH 的水平均显著下降（>80%的减少）。在煤焦油处理的土壤中，所有 PAH 均显著减少。在种植和未种植的土壤中，2-3 环化合物的损失明显大于 4-6 环化合物（>77%对 16-39%）。3-4 环化合物具有很强的植物修复证据，但 5-6 环化合物没有。焦化土壤中所有 12 种存在的 PAH 仅减少了 7-24%。PAH 的消散差异不大，焦化土壤中几乎没有植物修复效果的证据。结果表明，添加到土壤中的 PAH 的形式影响了它们的消散易感性。因此，实验室添加土壤中 PAH 消散的预测并不能反映实际情况。
