Electrokinetic remediation of six emerging organic contaminants from soil

Guedes, Paula; Mateus, Eduardo P.; Couto, Nazaré; Rodríguez, Yadira; Ribeiro, Alexandra B.

doi:10.1016/j.chemosphere.2014.06.017

Cited by 63 publications

(24 citation statements)

References 25 publications

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“…Electrokinetic and ED strategies are commonly applied to remove organic [19] and/or inorganic contaminants from soils or other porous matrices, such as sewage sludge, fly ash or construction materials [20,21,22]. The electrochemically-induced transport is based on the application of a low level direct current which promotes electrolysis reactions at the electrodes [20,23,24], involving in most cases water oxidation at the anode, eq.…”

Section: Electro-based Technologiesmentioning

confidence: 99%

Exploring hydrogen production for self-energy generation in electroremediation: A proof of concept

et al. 2019

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Highlights• Self-produced H2 from electrodialytic treatment of environmental matrices collected • Collected H2 average purity (% mol/mol) of ≈ 98%• A fuel cell used to produce electricity from the self-produced H2 (~1 V)• Experimental self-generated energy promotes savings on electroremediation (≈ 7%) AbstractElectrodialytic technologies are clean-up processes based on the application of a low-level electrical current to produce electrolysis reactions and the consequent electrochemically-induced transport of contaminants. These treatments inherently produce electrolytic hydrogen, an energy carrier, at the cathode compartment, in addition to other cathode reactions. However, exploring this by-product for self-energy generation in electroremediation has never been researched. In this work we present the study of hydrogen production during the electrodialytic treatment of three different environmental matrices (briny water, effluent and mine tailings), at two current intensities (50 and 100 mA). In all cases, hydrogen gas was produced with purities between 73% to 98%, decreasing the electrical costs of the electrodialytic treatment up to ≈ 7%. A protonexchange membrane fuel cell was used to evaluate the possibility to generate electrical energy from the hydrogen production at the cathode, showing a stable output (~1 V) and demonstrating the proof of concept of the process.

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Section: Electro-based Technologiesmentioning

confidence: 99%

Exploring hydrogen production for self-energy generation in electroremediation: A proof of concept

et al. 2019

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“…Therefore, the soil sample is separated in two different parts having various pH values, namely, high and low pH zones close to cathode and anode, respectively. The certain amounts of soil pH are highly dependent on the intensity of protons and hydroxyl transport, as well as soil geochemical features 57 .…”

Section: Variations Of Soil Phmentioning

confidence: 99%

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Abtahi

Jorfi

Mehrabi

et al. 2018

Chem.Biochem.Eng.Q.

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Effect of surfactant addition on persulfate-assisted electrokinetic remediation of pyrene-spiked soil was studied. The influence of effective factors including voltage, surfactant addition, moisture content, and persulfate concentration on the removal of initial pyrene concentration of 200 mg kg-1 were investigated. A complete pyrene removal was observed for voltage of 1 V cm-1 , saturated conditions, Tween 80 concentration of 20 mL kg-1 , and persulfate concentration of 100 mg kg-1 after 24 h, corresponding to pyrene mineralization of 61 %, based on TPH analysis. The experimental results were best fitted with pseudo-first-order kinetic model with correlation coefficient of 0.968 and rate constant of 0.191 min −1. The main intermediates of pyrene degradation were benzene o-toluic acid, acetic, azulene, naphthalene and decanoic acid. Finally, an unwashed hydrocarbon-contaminated soil was subjected to persulfate-assisted electrokinetic remediation, and a TPH removal of 38 % was observed for the initial TPH content of 912 mg kg-1 , under the selected conditions.

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“…A possible environmental friendly strategy is the bioremediation with the fungi Trametes versicolor that showed to be able to remove ibuprofen and other pharmaceuticals from a contaminated sludge and, simultaneously, reduced the global toxicity of the sludge (Guedes et al, 2014). …”

Section: Controlmentioning

confidence: 99%

“…However, most of the research has been focused on the treatment of contaminated water and wastewaters (Klavarioti et al, 2009) and in a less extent the developed approaches have been applied to soil, sediment or sludge, which can act as pharmaceuticals' reservoirs. Bioremediation with fungi (Rodríguez-Rodríguez et al, 2011), electrokinetic remediation (Guedes et al, 2014), advanced oxidation processes (Oncu and Balcioglu, 2013;Malmborg and Magn er, 2015) or nanoremediation (Machado et al, 2013;Han et al, 2015) are some of the remediation methods used for the removal of pharmaceuticals from soil, sediment and sludge.…”

Section: Introductionmentioning

confidence: 99%

Ecotoxicological impact of two soil remediation treatments in Lactuca sativa seeds

et al. 2016

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Electrokinetic remediation of six emerging organic contaminants from soil

Cited by 63 publications

References 25 publications

Exploring hydrogen production for self-energy generation in electroremediation: A proof of concept

Exploring hydrogen production for self-energy generation in electroremediation: A proof of concept

A Novel Combination of Surfactant Addition and Persulfate-assisted Electrokinetic Oxidation for Remediation of Pyrene-Contaminated Soil

Ecotoxicological impact of two soil remediation treatments in Lactuca sativa seeds

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