气候变化领域集成服务门户(CCPortal): A soil non-aqueous phase liquid (NAPL) flushing laboratory experiment based on measuring the dielectric properties of soil-organic mixtures via time domain reflectometry (TDR)

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DOI	10.5194/hess-23-3593-2019
	A soil non-aqueous phase liquid (NAPL) flushing laboratory experiment based on measuring the dielectric properties of soil-organic mixtures via time domain reflectometry (TDR)
	Comegna A.; Coppola A.; Dragonetti G.; Sommella A.
发表日期	2019
ISSN	1027-5606
起始页码	3593
结束页码	3602
卷号	23 期号:9
英文摘要	The term non-aqueous phase liquid (NAPL) refers to a group of organic compounds with scarce solubility in water. They are the products of various human activities and may be accidentally introduced into the soil system. Given their toxicity level and high mobility, NAPLs constitute a serious geo-environmental problem. Contaminant distribution in the soil and groundwater contains fundamental information for the remediation of polluted soil sites. The present research explored the possible employment of time domain reflectometry (TDR) to estimate pollutant removal in a silt-loam soil that was primarily contaminated with a corn oil as a light NAPL and then flushed with different washing solutions. Known mixtures of soil and NAPL were prepared in the laboratory to achieve soil specimens with varying pollution levels. The prepared soil samples were repacked into plastic cylinders and then placed in testing cells. Washing solutions were then injected upward into the contaminated sample, and both the quantity of remediated NAPL and the bulk dielectric permittivity of the soil sample were determined. The above data were also used to calibrate and validate a dielectric model (the α mixing model) which permits the volumetric NAPL content (θNAPL m3 m-3) within the contaminated sample to be determined and quantified during the different decontamination stages. Our results demonstrate that during a decontamination process, the TDR device is NAPL-sensitive: the dielectric permittivity of the medium increases as the NAPL volume decreases. Moreover, decontamination progression can be monitored using a simple (one-parameter) mixing model. © Author(s) 2019.
语种	英语
scopus关键词	Contamination; Decontamination; Dielectric properties of liquids; Groundwater; Groundwater pollution; Mixing; Mixtures; Permittivity; Permittivity measurement; Reflection; Reflectometers; Silt; Soil pollution control; Soil surveys; Soil testing; Washing; Contaminant distributions; Dielectric modeling; Dielectric permittivities; Geo-environmental problems; Laboratory experiments; Nonaqueous phase liquids; Solubility in waters; Time domain reflectometry; Soil pollution; Zea mays
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159617
作者单位	Comegna, A., School of Agricultural Forestry, Food, and Environmental Sciences (SAFE), University of Basilicata, Potenza, Italy; Coppola, A., School of Agricultural Forestry, Food, and Environmental Sciences (SAFE), University of Basilicata, Potenza, Italy; Dragonetti, G., Mediterranean Agronomic Institute, Land and Water Division, IAMB, Bari, Italy; Sommella, A., Department of Agriculture, University of Naples Federico II, Naples, Italy
推荐引用方式 GB/T 7714	Comegna A.,Coppola A.,Dragonetti G.,et al. A soil non-aqueous phase liquid (NAPL) flushing laboratory experiment based on measuring the dielectric properties of soil-organic mixtures via time domain reflectometry (TDR)[J],2019,23(9).
APA	Comegna A.,Coppola A.,Dragonetti G.,&Sommella A..(2019).A soil non-aqueous phase liquid (NAPL) flushing laboratory experiment based on measuring the dielectric properties of soil-organic mixtures via time domain reflectometry (TDR).Hydrology and Earth System Sciences,23(9).
MLA	Comegna A.,et al."A soil non-aqueous phase liquid (NAPL) flushing laboratory experiment based on measuring the dielectric properties of soil-organic mixtures via time domain reflectometry (TDR)".Hydrology and Earth System Sciences 23.9(2019).