scholarly journals On-site and in situ remediation technologies applicable to metal-contaminated sites in Antarctica and the Arctic: a review

2013 ◽  
Vol 33 (0) ◽  
Author(s):  
Danielle Camenzuli ◽  
Benjamin L. Freidman ◽  
Tom M. Statham ◽  
Kathryn A. Mumford ◽  
Damian B. Gore
Keyword(s):  
The Arctic ◽  
Contaminated Sites ◽  
In Situ Remediation

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

Geosciences ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 487 ◽  
Author(s):  
Aristeidis Nivorlis ◽  
Torleif Dahlin ◽  
Matteo Rossi ◽  
Nikolas Höglund ◽  
Charlotte Sparrenbom
Keyword(s):  
Direct Current ◽  
Time Domain ◽  
Chlorinated Solvents ◽  
Induced Polarization ◽  
Contaminated Sites ◽  
In Situ Remediation ◽  
Polarization Tomography ◽  
Refraction Tomography

Soil contamination is a widespread problem and action needs to be taken in order to prevent damage to the groundwater and the life around the contaminated sites. In Sweden, it is estimated that more than 80,000 sites are potentially contaminated, and therefore, there is a demand for investigations and further treatment of the soil. In this paper, we present the results from a methodology applied in a site contaminated with chlorinated solvents, for characterization of the contamination in order to plan the remediation and to follow-up the initial step of in-situ remediation in an efficient way. We utilized the results from three different methods; membrane interface probe for direct measurement of the contaminant concentrations; seismic refraction tomography for investigating the depth to the bedrock interface; and direct current resistivity and time-domain induced polarization tomography to acquire a high-resolution imaging of the electrical properties of the subsurface. The results indicate that our methodology is very promising in terms of site characterization, and furthermore, has great potential for real-time geophysical monitoring of contaminated sites in the future.

scholarly journals Chemical Degradation of PCDD/F in Contaminated Sediment

2016 ◽  
Vol 23 (3) ◽  
pp. 473-482 ◽  
Author(s):  
Pavel Hrabák ◽  
Martina Homolková ◽  
Stanisław Wacławek ◽  
Miroslav Černík
Keyword(s):  
Iron Nanoparticles ◽  
Chemical Degradation ◽  
Contaminated Sites ◽  
In Situ Remediation ◽  
Contaminated Sediment ◽  
High Oxidation State ◽  
High Oxidation ◽  
Zero Valent Iron Nanoparticles ◽  
Toxicity Equivalent

Abstract Due to the extreme toxicity of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), the remediation of PCDD/F aquifer source zones is greatly needed; however, it is very difficult due to their persistence and recalcitrance. The potential degradability of PCDD/F bound to a real matrix was studied in five systems: iron in a high oxidation state (ferrate), zero-valent iron nanoparticles (nZVI), palladium nanopowder (Pd), a combination of nZVI and Pd, and persulfate (PSF). The results were expressed by comparing the total toxicity of treated and untreated samples. This was done by weighting the concentrations of congeners (determined using a standardized GC/HRMS technique) by their defined toxicity equivalent factors (TEF). The results indicated that only PSF was able to significantly degrade PCDD/F. Toxicity in the system decreased by 65% after PSF treatment. Thus, we conclude that PSF may be a potential solution for in-situ remediation of soil and groundwater at PCDD/F contaminated sites.

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