植物修复过程中多环芳烃污染土壤的疏水性评估。
Evaluation of hydrophobicity in PAH-contaminated soils during phytoremediation.
作者信息
Cofield Naressa, Banks M Katherine, Schwab A Paul
机构信息
Purdue University, School of Civil Engineering, 550 Stadium Mall Drive, West Lafayette, IN 47907, USA.
出版信息
Environ Pollut. 2007 Jan;145(1):60-7. doi: 10.1016/j.envpol.2006.03.040. Epub 2006 Jun 27.
The impact of recalcitrant organic compounds on soil hydrophobicity was evaluated in contaminated soil from a manufactured gas plant site following 12 months of phytoremediation. Significant reduction in soil wetting and water retention was observed in contaminated soil compared to an uncontaminated control. Phytoremediation was effective at reducing total PAHs by 69% with corresponding changes in soil classification from extremely hydrophobic (initial sample) to moderately-strongly hydrophobic (planted) and hydrophilic-very hydrophilic (unplanted) after 12 months. The greatest reduction in soil hydrophobicity was observed in the unplanted, unfertilized treatments that had the lowest removal rate of PAHs. The presence of plants may contribute to hydrophobicity in contaminated soil.
在经过12个月植物修复的煤气厂污染土壤中，评估了难降解有机化合物对土壤疏水性的影响。与未受污染的对照相比，污染土壤中土壤湿润和保水能力显著降低。植物修复有效地将总多环芳烃减少了69%，12个月后土壤分类相应地从极疏水（初始样品）变为中度 - 强疏水（种植）和亲水 - 极亲水（未种植）。在多环芳烃去除率最低的未种植、未施肥处理中，观察到土壤疏水性的最大降低。植物的存在可能导致污染土壤中的疏水性。
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