School of Geography, Earth and Environmental Sciences, University of Birmingham, UK.
J Environ Manage. 2013 Nov 15;129:18-24. doi: 10.1016/j.jenvman.2013.05.041. Epub 2013 Jun 20.
A comparison was made between the dissipation of pyrene as well as the uptake of copper (Cu) in soil freshly spiked with Cu, pyrene or Cu + pyrene and in aged soil. The potential of B juncea for phytoremediation was also investigated. The biomass of Brassica juncea significantly decreased (>50% reduction) in freshly spiked soil when compared to aged soil in all treatments. However, the accumulation of Cu in shoot was significantly reduced (60-88%) in aged soil after 60 days of planting. The total removal of Cu from co-contaminated soil was always higher (>2-3 fold) in aged soil than in freshly spiked soil when lower Cu concentration (50 mg kg(-1)) was co-contaminated with 250 or 500 mg kg(-1) of pyrene while in other co-contaminated treatments, the total removal of Cu from aged soil were significantly lower. The level of pyrene in both planted and un-planted freshly spiked soil decreased significantly (>67%) over the 60 days of plant trial. In aged soils, there were no significant differences in residual pyrene concentration between planted and unplanted soil. This suggests that the presence of B. juncea in aged soil did not enhance the dissipation of pyrene and that the prediction of pyrene dissipation in laboratory prepared soil may not have reflected the true situation in the fields.
比较了新鲜添加 Cu、芘或 Cu + 芘的土壤与老化土壤中芘的消散和铜（Cu）的吸收。还研究了 B. juncea 用于植物修复的潜力。与所有处理中的老化土壤相比，新鲜添加土壤中油菜生物量明显减少（>50%减少）。然而，在种植 60 天后，老化土壤中茎叶 Cu 的积累显著减少（60-88%）。当较低浓度（50 mg kg（-1））的 Cu 与 250 或 500 mg kg（-1）的芘共污染时，老化土壤中从共污染土壤中去除的 Cu 总量始终高于新鲜添加土壤（>2-3 倍），而在其他共污染处理中，从老化土壤中去除的 Cu 总量则明显较低。在 60 天的植物试验过程中，无论是种植的还是未种植的新鲜添加土壤中的芘含量均显著下降（>67%）。在老化土壤中，种植和未种植土壤之间的残留芘浓度没有显着差异。这表明，B. juncea 在老化土壤中的存在并没有促进芘的消散，并且在实验室制备土壤中预测芘的消散可能没有反映实际情况。
