Spectral induced polarization for monitoring electrokinetic remediation processes

Masi, Matteo; Losito, G.

doi:10.1016/j.jappgeo.2015.08.011

Cited by 12 publications

(6 citation statements)

References 44 publications

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“…Nevertheless, this is the only case where EDL polarization is observed, likely because of the higher pH values. These results are consistent with those observed by Masi and Losito (2015). In fact, they found an increase in polarization (chargeability) only with water at both ends (EXP1), while the use of acids at the cathode does not change the mean polarization of the specimen with respect to the initial value.…”

Section: Discussionsupporting

confidence: 92%

“…9a), where the phase reaches values up to 8 mrad (S1) at the end of the experiment. Since the main polarization mechanism can be attributed to the EDL (Stern layer) polarization (Masi and Losito, 2015), the polarization should be stronger where pH is high (Lorenz, 1969;Mei et al, 2016). Therefore, the low pH conditions implemented on the other experiments prevents the observation of a clear capacitive effect.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, research in this field so far has mainly focused on laboratory studies in an effort to analyze potential and limits of the geoelectrical measurements for monitoring an EK remediation process. Masi and Losito (2015) presented a laboratory application of the SIP method before and after an electrokinetic remediation of metalcontaminated marine sediments. The authors found a good correlation between the chargeability and the pH, due to the EDL polarization.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Time-lapse monitoring of an electrokinetic soil remediation process through frequency-domain electrical measurements

Cercato

Donno

2020

Journal of Applied Geophysics

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Section: Discussionsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time-lapse monitoring of an electrokinetic soil remediation process through frequency-domain electrical measurements

Cercato

Donno

2020

Journal of Applied Geophysics

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“…In our study, it was possible to find a linear link between bulk and electrical water conductivity and the redox‐sensitive parameters, such as dissolved iron. Masi and Losito () highlighted the importance of pH dependent processes on the DCIP surveys. Along the investigated transects, the pH mainly falls between 5 and 7; thus, the electrical conductivity is not highly affected by changes in the pH.…”

Section: Discussionmentioning

confidence: 99%

Geophysics‐Based Contaminant Mass Discharge Quantification Downgradient of a Landfill and a Former Pharmaceutical Factory

Balbarini

Rønde

Maurya

et al. 2018

Water Resources Research

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Contaminant mass discharge is a commonly applied tool to evaluate the environmental impact of contaminated sites on water resources. At large contaminated sites with heterogeneous sources, such as landfills, the number of wells available is often not sufficient, leading to a high uncertainty of mass discharge estimates. In this study, we tackle the uncertainty of the contaminant mass discharge due to low sampling densities by interpolating limited water‐sample data with the support of surface direct current resistivity and induced polarization geophysical data. The method relies on finding a conceptual link between the bulk conductivity imaged from geophysics and the contaminant concentrations. We investigate the link between (1) imaged bulk and electrical water conductivity, (2) water conductivity and conservative ionic species, (3) water conductivity and redox‐sensitive species, (4) water conductivity and semipersistent organic species, and (5) water conductivity and biodegradable organic compounds. The method successfully identify similarities between the distribution of the bulk conductivity and chloride and pharmaceutical compounds in a landfill leachate plume and between the bulk conductivity data and benzene and chlorinated ethenes for a contaminant plume from a former pharmaceutical factory. Contaminant concentrations were interpolated through regression kriging, using geophysical data as the dependent variable. The distribution of concentration determined with the novel method showed a lower mean relative estimation error than the traditional method of kriging only contaminant concentration data. At large sites, the method can improve contaminant mass discharge estimates, especially if surface geophysical measurements are integrated in the site investigation at an early stage.

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“…Induced polarization (IP) is of special interest to reactive transport, as it is sensitive to processes at the solid-liquid interface, as well as to the electrolyte properties. In the field of contaminant hydrology, a significant number of studies attempted to use IP methods to detect contamination in the field scale (Sogade et al , 2006;Masi et al , 2015). The geoelectrical signature is known to be a composite signature of the porous media itself, the chemical composition of the aqueous phase, the non-aqueous free phases, if such exist (e.g.…”

Section: Introductionmentioning

confidence: 99%

Geophysically-based analysis of BTCs and ion exchange processes in soil

Moshe¹,

Kessouri²,

Erlich³

et al. 2020

Preprint

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Abstract. Breakthrough curves (BTCs) are a valuable tool for qualitative and quantitative examination of transport patterns in porous media. Although breakthrough (BT) experiments are simple, they often require extensive sampling and multi-component chemical analysis. In this work, we examine spectral induced polarization (SIP) signals measured along a soil column during a BT experiment in a homogeneous and heterogeneous soil profiles. Soil profiles were equilibrated with an NaCl background solution and then a constant flow of CaCl2 solution was applied. SIP signature was recorded, and complementary ion analysis was performed on the collected outflow samples. Our results confirm that changes to the pore-water composition, ion exchange processes and profile heterogeneity are detectable by SIP: the real part of the conductivity-based BTCs clearly indicated the BT of the non-reactive ions as well as the retarded BT of Ca2+. The imaginary part of the conductivity-based curves reacted to the changes in ion mobility around the electrical double layer (EDL) and indicated the initiation and the termination of the Na+–Ca2+ exchange reaction. Finally, both the real and imaginary components of the complex conductivity reacted to the presence of a coarser textured layer in the heterogeneous profile.

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Spectral induced polarization for monitoring electrokinetic remediation processes

Cited by 12 publications

References 44 publications

Time-lapse monitoring of an electrokinetic soil remediation process through frequency-domain electrical measurements

Time-lapse monitoring of an electrokinetic soil remediation process through frequency-domain electrical measurements

Geophysics‐Based Contaminant Mass Discharge Quantification Downgradient of a Landfill and a Former Pharmaceutical Factory

Geophysically-based analysis of BTCs and ion exchange processes in soil

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