Phytoremediation of Light Non-Aqueous Phase Liquids

摘要：

　　Non-aqueous phase liquids(NAPLs)are persistent sources of contamination in the ground,providing a long-term supply of dissolved phase contamination and taking significant periods to dissipate naturally.Light NAPLs(LNAPLs)take the form of a separate phase within the ground,often as individual ganglia in pore spaces within the capillary zone such that the contaminated region is diffuse and comprised of many unconnected small contaminant sources.Consequently,remedial action is challenging and success may be limited to ex-situ remediation techniques.The ability of plants to phytoremediate dissolved-phase contamination is well known,but the impact of LNAPLs on plant growth and subsequent contaminant behaviour is largely unknown.Experimental work with ryegrass(Lolium perenne)is presented,exploring the impact of the physical presence of an LNAPL(mineral oil)on plant growth,root distribution and oil removal.The presence of the oil was found to significantly impact root biomass and distribution,leading to zones of increased root growth alongside decreased shoot growth.Significant removal of the LNAPL was noted in both hydroponic conditions and planted soil.

关键词： Phytoremediation Ryegrass Mineral oil Non-aqueous phase liquids

作者: Sunday Oniosun Michael Harbottle Snehasis Tripathy Peter Cleall

作者单位: School of Engineering,Cardiff University,Cardiff,UK

会议类型: 国际会议

会议名称: The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)

会议地点: 杭州

会议语种:英文

页码: 788-795

在线出版日期: 2018-10-28（万方平台首次上网日期，不代表论文的发表时间）