Measuring the dielectric properties of soil–organic mixtures using coaxial impedance dielectric reflectometry

Francisca, Franco Matías; Montoro, Marcos Alexis

doi:10.1016/j.jappgeo.2012.01.011

Cited by 30 publications

(30 citation statements)

References 42 publications

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“…The CRIM model does not account for the microgeometry of the components. However, despite this limitation, and the apparent simplicity of using the CRIM model, remarkably good agreement was found in modeling the dielectric properties of geological materials (Knight, 2001) and soil-water-NAPL mixture (Francisca and Montoro, 2012). For mixtures of soil and water, the CRIM formula yields:…”

Section: Mixing Modelsmentioning

confidence: 99%

“…Most studies have demonstrated estimation of NAPL essentially in saturated coarse-grained media (Redman and DeRyck, 1994;Chenaf and Amara, 2001;Persson and Berndtsson, 2002;Haridy et al, 2004;Mohamed and Said, 2005;Ajo-Franklin et al, 2006;Moroizumi and Sasaki, 2006;Francisca and Montoro, 2012). Little is known about the dielectric behaviour of contaminated fine-grained soils.…”

Section: Introductionmentioning

confidence: 99%

“…The experimentation strategy of the present research emphasized, in a preliminary approach, the study of the potential use of TDR to monitor or map f (= w+ NAPL) in soil. The specific aims include: i) evaluation of correlations between f in variable saturated volcanic Vesuvian soil, and dielectric permittivity, ii) examination and validation of the mixing model provided by Francisca and Montoro (Francisca and Montoro, 2012) for predicting the dielectric permittivity of contaminated soil; iii) exploration of the potential application of electromagnetic waves to evaluate the effect of contaminant removal in soil in context.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the time domain reflectometry (TDR) technique has been proposed as potentially exhibiting sufficient sensitivity and lateral and vertical resolution for characterization of saturation of NAPLs ( NAPL). This is because commonly encountered NAPLs have a dielectric permittivity of 2-10 versus 81 for water, 1 for air, and 4-5 for soil mineral grains (Ajo-Franklin et al, 2006).Most studies have demonstrated estimation of NAPL essentially in saturated coarse-grained media (Redman and DeRyck, 1994;Chenaf and Amara, 2001;Persson and Berndtsson, 2002;Haridy et al, 2004;Mohamed and Said, 2005;Ajo-Franklin et al, 2006;Moroizumi and Sasaki, 2006;Francisca and Montoro, 2012). Little is known about the dielectric behaviour of contaminated fine-grained soils.…”

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confidence: 99%

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Time domain reflectometry-measuring dielectric permittivity to detect soil non-acqeous phase liquids contamination-decontamination processes

Comegna¹,

Coppola²,

Dragonetti³

et al. 2013

J Agricult Engineer

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Contamination of soils with non-aqueous phase liquids (NAPL) constitutes a serious geo-environmental problem, given the toxicity level and high mobility of these organic compounds. To develop effective decontamination methods, characterisation and identification of contaminated soils are needed. The objective of this work is to explore the potential of dielectric permittivity measurements to detect the presence of NAPLs in soils. The dielectric permittivity was measured by Time Domain Reflectometry method (TDR) in soil samples with either different volumetric content of water ( w) and NAPL ( NAPL) or at different stages during immiscible displacement test carried out with two different flushing solutions. A mixing model proposed by Francisca and Montoro, was calibrated to estimate the volume fraction of contaminant present in soil. Obtained results, showed that soil contamination with NAPL and the monitoring of immiscible fluid displacement, during soil remediation processes, can be clearly identified from dielectric measurements. IntroductionSubsurface contamination of soil and groundwater with organic compounds from waste disposal sites, industrial spills, gasoline stations, mine tailings and industrial processes constitutes a serious geoenvironmental problem. The detrimental effects are limited not only to deterioration of chemical, physical and mechanical properties of soils, but also constitute a real risk to human health and the well-being of other living species.Non-aqueous phase liquids (NAPLs), are organic compounds immiscible with water. They have low solubility that may still be several orders of magnitude higher than that of acceptable drinking water standards. NAPLs can be further subdivided into those that are denser than water (DNAPLs) and those that are lighter than water (LNAPLs). Chlorinated solvents such as trichloroethylene (TCE) and tetrachloroethylene (PCE) and polychlorinated biphenyl oils (PCBs) are common examples of DNAPLs. Hydrocarbon fuels such as gasoline, kerosene and jet fuels are common LNAPL contaminants which pollute the environment extensively (Illangasekare, 1998;Jury and Horton, 2004).Following a near-surface release, NAPLs penetrate the subsurface as an immiscible oil phase that migrates in response to gravity and capillary forces. This results in substantial sensitivity to the local distribution of soil and aquifer properties (e.g. permeability and porosity) beneath the source (Gerhard et al., 2007). As a result, the NAPL body (e.g. the source zone) is often expected to exhibit a complex heterogeneous distribution of both mobile pools (i.e. connected-phase accumulations) and immobile residuals (i.e. disconnected blobs and ganglia (Mercer and Cohen, 1990).The remediation of contaminated soil sites requires knowledge of the contaminant distribution in the soil profile and groundwater. Methods commonly used to characterize contaminated sites are coring, soil sampling and the installation of monitoring wells for the collection of groundwater samples (Mercer and Cohen, 1...

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Section: Mixing Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Time domain reflectometry-measuring dielectric permittivity to detect soil non-acqeous phase liquids contamination-decontamination processes

Comegna¹,

Coppola²,

Dragonetti³

et al. 2013

J Agricult Engineer

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“…This is attributed to the fact that diesel oil replaces air contained within the pore spaces of the soil samples and changes the path of electric current conduction. The dielectric properties of a sandy soil contaminated with non-aqueous phase liquids has been investigated by Francisco and Montoro [14].…”

mentioning

confidence: 99%

Measured Dielectric Permittivity of Contaminated Sandy Soil at Microwave Frequency

Abdelgwad

Said

2016

J. Microw. Optoelectron. Electromagn. Appl.

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Effects of Contamination and Dry Density on Dielectric Properties of Soils with Different Specific Surface Area

Orangi²,

Lin

et al. 2021

Challenges and Innovations in Geomechanics

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Measuring the dielectric properties of soil–organic mixtures using coaxial impedance dielectric reflectometry

Cited by 30 publications

References 42 publications

Time domain reflectometry-measuring dielectric permittivity to detect soil non-acqeous phase liquids contamination-decontamination processes

Time domain reflectometry-measuring dielectric permittivity to detect soil non-acqeous phase liquids contamination-decontamination processes

Measured Dielectric Permittivity of Contaminated Sandy Soil at Microwave Frequency

Effects of Contamination and Dry Density on Dielectric Properties of Soils with Different Specific Surface Area

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