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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Effect of soil depth on phytoremediation efficiency for petroleum contaminants
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Effect of soil depth on phytoremediation efficiency for petroleum contaminants

机译：土壤深度对石油污染物植物修复效率的影响

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摘要

Biodegradation of organic contaminants in soil may be enhanced by the presence of vegetation. Evaluating the effect of soil depth on phytoremediation efficiency may provide researchers and regulators with a clearer understanding of contaminant clean-up. A column study with polycyclic aromatic hydrocarbons (PAHs) and diesel-contaminated soil was conducted over a 147-day period of switchgrass {Panicum virgatum) growth. Analysis of the contaminants and plant biomass was conducted along with microbial enumeration at three soil depths in 49-day intervals. Remediation proceeded rapidly near the surface of the soil (0-20 cm) for both vegetated and unvegetated columns, but the effect of vegetation relative to an unvegetated control only was significant in the lower soil depths. Contaminant dissipation in the 20-40 and 40-60 cm layers was not significantly different between vegetated and unvegetated soil.
机译：植被的存在可以促进土壤中有机污染物的生物降解。评估土壤深度对植物修复效率的影响可能为研究人员和管理人员提供对清除污染物的更清晰了解。在147天的柳枝{（Panicum virgatum）生长期，对多环芳烃（PAHs）和被柴油污染的土壤进行了专栏研究。在49天的间隔内，对三种土壤深度的污染物和植物生物量以及微生物计数进行了分析。植被柱和非植被柱的土壤表面（0-20厘米）附近修复均迅速进行，但是相对于无植被对照，植被的影响仅在土壤深度较低时才显着。植被土壤和非植被土壤在20-40和40-60 cm层的污染物消散没有显着差异。

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