Multidisciplinary Characterization of Chlorinated Solvents Contamination and In-Situ Remediation with the Use of the Direct Current Resistivity and Time-Domain Induced Polarization Tomography

Nivorlis, Aristeidis; Dahlin, Torleif; Rossi, Matteo; Höglund, Nikolas Benavides; Sparrenbom, Charlotte

doi:10.3390/geosciences9120487

Cited by 15 publications

(24 citation statements)

References 32 publications

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“…The contaminants are mostly present in the fine-grained quaternary deposit (silty clay), which is dominant in the subsurface and extends from 2 to 7 m depth. The current geological model (Nivorlis et al 2019) suggests that a small amount is leaking through the thinner and coarser layer underneath and spreading downgradient. Based on soundings and well logs the crystalline bedrock can be found at 7-9 m depth, and based on previous investigations (Nivorlis et al 2019) it is believed to be intact and act as an impermeable layer in our conceptual model.…”

Section: Site Descriptionmentioning

confidence: 90%

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Temporal filtering and time-lapse inversion of geoelectrical data for long-term monitoring with application to a chlorinated hydrocarbon contaminated site

Nivorlis

Rossi

Dahlin

2021

Geophysical Journal International

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SUMMARY We present a solution for long-term direct current resistivity and time-domain induced polarization (DCIP) monitoring, which consists of a monitoring system and the associated software that automates the data collection and processing. This paper describes the acquisition system that is used for remote data collection and then introduces the routines that have been developed for pre-processing of the monitoring data set. The collected data set is pre-processed using digital signal processing algorithms for outlier detection and removal; the resulting data set is then used for the inversion procedure. The suggested processing workflow is tested against a simulated time-lapse experiment and then applied to field data. The results from the simulation show that the suggested approach is very efficient for detecting changes in the subsurface; however, there are some limitations when no a priori information is used. Furthermore, the mean weekly data sets that are generated from the daily collected data can resolve low-frequency changes, making the approach a good option for monitoring experiments where slow changes occur (i.e. leachates in landfills, internal erosion in dams, bioremediation). The workflow is then used to process a large data set containing 20 months of daily monitoring data from a field site where a pilot test of in situ bioremediation is taking place. Based on the time-series analysis of the inverted data sets, we can detect two portions of the ground that show different geophysical properties and that coincide with the locations where the different fluids were injected. The approach that we used in this paper provides consistency in the data processing and has the possibility to be applied to further real-time geophysical monitoring in the future.

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Section: Site Descriptionmentioning

confidence: 90%

“…The spread of PCE led to the formation of a DNAPL source zone underneath the building. Over the years, the contaminant has migrated as a result of the groundwater flow and the bedrock topography (Nivorlis et al 2019), forming a larger DNAPL plume.…”

Section: Site Descriptionmentioning

confidence: 99%

Temporal filtering and time-lapse inversion of geoelectrical data for long-term monitoring with application to a chlorinated hydrocarbon contaminated site

Nivorlis

Rossi

Dahlin

2021

Geophysical Journal International

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“…Several techniques are used for treating chlorinated compounds from water. These include biodegradation Frascari et al, 2019;Khan et al, 2019;Papazi et al, 2019;Pathiraja et al, 2019;Nivorlis et al, 2019;Serbent et al, 2019), photochemical Ding et al, 2020;Li et al, 2019), adsorption (Dontriros et al, 2020;Du et al, 2020;Liang et al, 2020;Lo et al, 2020;Qian et al, 2020), chemical (Kim et al, 2020;Qian et al, 2020;, electrochemical (Du et al, 2020;McQuillan et al, 2020;Xu et al, 2020), photo-electrochemical membrane (Abdel-Shafy et al, 2017;Du et al, 2020;Vlotman et al, 2019;Wan et al, 2020), supercritical extraction (Zhang and Zhang, 2020), electron selectivity , neural network modeling , and catalytic (Nieto-Sandoval et al, 2019;Ruan et al, 2019;Zheng et al, 2020) method. Related literature on the electrolytic treatment methods application for different types of wastewater is shown in Table 4.…”

Section: Technologies Used For De-chlorination Of Watermentioning

confidence: 99%

Chlorine and Chlorinated Compounds Removal from Industrial Wastewater Discharges: A Review

Al-Hwaiti

Aziz

Ahmad

et al. 2021

CMUJNS

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Adsorption techniques for industrial wastewater treatment rich in heavy metals and aqueous solutions of water-soluble such as Cl−, F−, HCO3−, NO3−, SO2−4, and PO3−, often include technologies for toxicity removals. The recent advancement and technical applicability in the treatment of chlorine and chlorinated compounds from industrial wastewater are reviewed in this article. Chlorine and chlorinated compounds are among the common discharged constituents from numerous industries. They can be carcinogenic or naturally toxic and can pose issues to aquatic ecosystems and human beings. Thus, elimination of chlorides and chlorinated compounds from water or wastewater is inevitable to get rid of the problem. Several techniques are being applied for the reduction of chlorine and chlorinated compounds in water. These include biodegradation, photochemical, adsorption, chemical, electrochemical, photo-electrochemical, membrane, supercritical extraction and catalytic method. Chlorine can react with various organic and inorganic micro-pollutants. However, the potential reactivity of chlorine for specific compounds is small, and only minor variations in the structure of the parent compound are anticipated in the water treatment process under typical conditions. This paper reviews different techniques and aspects related to chlorine removal, the types of chlorine species in solution and their catalyst, chlorine fate and transport into the environment, electrochemical techniques for de-chlorination of water, kinetics, mechanisms of reduction of chlorinated compounds, and kinetics of the electrochemical reaction of chlorine compounds. Keywords: Industrial waste, Kinetics, Wastewater, Water purification

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“…As a result, DNAPL SZs can contain highly saturated DNAPL pools (high electrical resistivity) that are underlain by clayey lenses (high chargeability), indicating the potential of DCIP for providing enhanced information at DNAPL sites. A number of recent studies have applied DCIP at DNAPL sites (Johansson et al., 2015; Nivorlis et al., 2019; Sparrenbom et al., 2017); however, despite its potential, DCIP provided limited characterization of the DNAPL structure. All of these studies assessed the potential of DCIP directly at field sites that contain an unknown, complex DNAPL SZ superimposed upon an uncertain, heterogeneous soil matrix, thereby making interpretation of the recorded data highly challenging (Johansson et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

Mapping and Monitoring of DNAPL Source Zones With Combined Direct Current Resistivity and Induced Polarization: A Field‐Scale Numerical Investigation

Almpanis

Gerhard

Power

2021

Water Resources Research

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Direct current (DC) resistivity has been widely investigated for non‐invasive mapping of dense non‐aqueous phase liquids (DNAPLs); however, due to its difficulty in distinguishing DNAPLs from adjacent soils, the DC method is limited for static detection of DNAPLs and more often employed for monitoring DNAPL changes over time. Time‐domain induced polarization (IP) can provide complementary information to better discriminate between DNAPL, water and surrounding soils. Since highly resistive DNAPLs tend to laterally spread and pool on polarizable (chargeable) clay lenses, combined DC and IP (DCIP) has the potential to enhance static detection, and also monitoring of DNAPL source zones (SZs). The objective of this study is to assess DCIP for characterizing and monitoring DNAPL SZs at the field‐scale. A new DNAPL‐DCIP numerical model was first developed that couples a 3D multiphase flow model, which simulates DNAPL release and remediation scenarios, with a 3D DCIP model, which calculates the corresponding resistivity and chargeability response. The sensitivity of the DCIP response to key DNAPL and soil properties was then analyzed at a single subsurface location, closely matching previous theoretical and experimental observations. Finally, a field‐scale simulation of DNAPL release and remediation was conducted, with simultaneous mapping by DCIP surveys. Results demonstrate that chargeability can provide enhanced understanding of the lithological distribution that controls the variability in the DNAPL SZ, with time‐lapse resistivity being used to monitor DNAPL mass changes during SZ remediation. This numerical study suggests that combined DCIP can be valuable for site characterization and time‐lapse monitoring performance at DNAPL‐impacted sites.

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Multidisciplinary Characterization of Chlorinated Solvents Contamination and In-Situ Remediation with the Use of the Direct Current Resistivity and Time-Domain Induced Polarization Tomography

Cited by 15 publications

References 32 publications

Temporal filtering and time-lapse inversion of geoelectrical data for long-term monitoring with application to a chlorinated hydrocarbon contaminated site

Temporal filtering and time-lapse inversion of geoelectrical data for long-term monitoring with application to a chlorinated hydrocarbon contaminated site

Chlorine and Chlorinated Compounds Removal from Industrial Wastewater Discharges: A Review

Mapping and Monitoring of DNAPL Source Zones With Combined Direct Current Resistivity and Induced Polarization: A Field‐Scale Numerical Investigation

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