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	Feasibility study of using centrifuge for investigating LNAPL migration in unsaturated soils
	Lo, IMC ; Hu, LM ; Meegoda, JN
	2010-05-11 ; 2010-05-11
关键词	centrifuge modeling contaminant transport geo-environmental engineering light non-aqueous phase liquids leaking underground storage tanks modeling of models FLOW LABORATORY EXPERIMENTS TRANSPORT SAND BIODEGRADATION LIQUIDS RATES ZONE Environmental Sciences
中文摘要	Centrifuge modeling appears potentially useful for studying geo-environmental problems such as pollutant migration in subsurface systems. In this study, the "modeling of models" technique was used to validate the feasibility of using a geotechnical centrifuge to model the transport behavior of light non-aqueous phase liquids (LNAPLs) in unsaturated soils. All the experiments were conducted to simulate a gasoline spill from a leaking underground storage tank (UST) and the subsequent subsurface migration of the gasoline. When the gravity in the centrifuge reached the desired g-level, the gasoline was released from the UST and then it migrated in the unsaturated soil corresponding to a prototype time equivalent of one year After the centrifuge tests, soil samples were collected using sampling tubes and the concentrations of individual constituent in the LNAPL were directly measured by means of gas chromatograph analysis. Results obtained from the centrifuge tests at different g-levels show that similar migration patterns are found for LNAPL transport in unsaturated porous media. The location of the peak concentration and the behavior of lateral spreading can be adequately described. In addition, centrifuge test data show that the migration pattern of LNAPLs is related to the soil type and the physical properties of individual constituents in the LNAPLs.
语种	英语 ; 英语
出版者	TAYLOR & FRANCIS INC ; PHILADELPHIA ; 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27407]
专题	清华大学
推荐引用方式 GB/T 7714	Lo, IMC,Hu, LM,Meegoda, JN. Feasibility study of using centrifuge for investigating LNAPL migration in unsaturated soils[J],2010, 2010.
APA	Lo, IMC,Hu, LM,&Meegoda, JN.(2010).Feasibility study of using centrifuge for investigating LNAPL migration in unsaturated soils..
MLA	Lo, IMC,et al."Feasibility study of using centrifuge for investigating LNAPL migration in unsaturated soils".(2010).

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