Field application of electrokinetic remediation for multi-metal contaminated paddy soil using two-dimensional electrode configuration

Kim, Woo-Seung; Jeon, Eun-Ki; Jung, Jinhong; Jung, Hong-Bae; Ko, Seung Hwan; Seo, Chang-Il; Baek, Kitae

doi:10.1007/s11356-013-2424-0

Cited by 61 publications

(15 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, EKSF has been studied for the removal of metals [9,18,[20][21][22][23][24][25][26], pesticides [1,[27][28][29], polycyclic aromatic hydrocarbons [5,[30][31][32][33][34][35][36][37][38][39], and PCBs [15,[40][41][42]. The transport of hydrophobic organic compounds (HOC) through the soil should be evaluated because these pollutants cannot be mobilized by electro-osmosis (low water solubility) or electromigration (non-polar molecules), and thus the use of special flushing-fluids is necessary [38,43].…”

Section: Introductionmentioning

confidence: 99%

Removal of oxyfluorfen from spiked soils using electrokinetic soil flushing with linear rows of electrodes

Risco

Rodrigo

Vizcaíno

et al. 2016

Chemical Engineering Journal

View full text Add to dashboard Cite

This study focuses on the evaluation of the Electrokinetic Soil Flushing (EKSF) strategy to remediate soil following a simulated spill of the herbicide oxyfluorfen. EKSF is attained by placing (in the soil mockup) two rows of electrodes of different polarity facing each other. The results are compared with those obtained in a reference experiment in which the same spill was simulated and no remediation actions were taken. In addition to the daily monitoring of the most important parameters in the flows, after the remediation test, a post-mortem analysis was performed to obtain a 3-D map of the pollutant distribution. Those results demonstrate that despite the hydrophobic character of oxyfluorfen, it can be efficiently transported by EKSF. Hence, after 34 days of treatment, a 26.8% improvement in the removal of oxyfluorfen was achieved (explained in terms of the effect of the electric field on the pollutant) compared with the reference experiment 2 in which only volatilization can explain the removal of the herbicide. Comparison of the removal of oxyfluorfen by EKSF with that of 2,4-D (studied in a previous study) demonstrates that comparable dragging to the cathode and volatilization are obtained. However, the lower efficiency of the transport of oxyfluorfen by gravity fluxes and electromigration (explained because it is contained as micelles) yielded worse performance of EKSF for this water-insoluble pesticide and hence less efficient remediation. This contradictory result reveals the importance of tests at large-scale facilities such as that used in this work to predict the performance of real systems in future full-scale applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of oxyfluorfen from spiked soils using electrokinetic soil flushing with linear rows of electrodes

Risco

Rodrigo

Vizcaíno

et al. 2016

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…The removal of contaminants from contaminated media mainly relies on EOF and electrophoresis [16]. In this study, the results in Figure 9a show that the fixed electrode configuration of 185 mm had the highest carbon removal followed by the 335-260-185 mm continuous approaching electrode configuration.…”

Section: Effect Of Electrode Configuration and Application Of Biosurfmentioning

confidence: 57%

“…In electrokinetic remediation, great emphasis is also put on the configuration of the electrodes besides the addition of enhancement additives, consideration of voltage gradient, electrolytes, and operational time because electrode configurations strongly affect the final efficiency of the process and the overall costs [16]. Various electrokinetic improvement interventions have been reported but most have low decontamination efficiencies, lead to extreme increments in treatment costs, and encourage a mass transfer of the contaminants in the remediation process; in fact, the contaminant would still be present in the aqueous phase after treatment [17].…”

Section: Introductionmentioning

confidence: 99%

Application of Biosurfactants and Pulsating Electrode Configurations as Potential Enhancers for Electrokinetic Remediation of Petrochemical Contaminated Soil

Gidudu

Chirwa

2020

Sustainability

View full text Add to dashboard Cite

The remediation of soil contaminated with petrochemicals using conventional methods is very difficult because of the complex emulsions formed by solids, oil, and water. Electrokinetic remediation has of recent shown promising potential in the removal of organics from contaminated media as calls for further improvement of the technology are still made. This work investigated the performance of electrokinetic remediation of soil contaminated with petrochemicals by applying fixed electrode configurations and continuous approaching electrode configurations. This was done in combination with bioremediation by inoculating hydrocarbon degrading bacteria and biosurfactants with the aim of obtaining an improved method of remediation. The results obtained show that the biosurfactant produced by the hydrocarbon degrading bacteria Pseudomonas aeruginosa was able to enhance oil extraction to 74.72 ± 2.87%, 57.375 ± 3.75%, and 46.2 ± 4.39% for 185 mm fixed electrodes, 335-260-185 mm continuous approaching electrodes, and 335 mm fixed electrode configurations, respectively. By maintaining high current flow, the 335-260-185 mm continuous approaching electrodes configuration enhanced electroosmotic flow (EOF) on every event of electrodes movement. The fixed electrode configuration of 185 mm provided amiable pH conditions for bacterial growth by allowing quick neutrality of the pH due to high EOF as compared to the 335 mm fixed electrodes configuration. After 240 h, the carbon content in the soil was reduced from 0.428 ± 0.11 mg of carbon/mg of the soil to 0.103 ± 0.005, 0.11355 ± 0.0006, and 0.1309 ± 0.004 for 185 mm, 335-260-185 mm, and 335 mm, respectively. The application of biosurfactants and continuous approaching electrodes reduced the energy expenditure of electrokinetic remediation by enhancing the decontamination process with respect to time.

show abstract

“…However, only limited research that studied about two-dimensional configuration. The examples of two-dimensional configuration are hexagonal, square, and triangular configuration (Barba et al, 2018;Kim et al, 2013). Onedimensional configuration is not practical to use in the field since a half of the total area is ineffective for electrokinetic reaction (dead zones).…”

Section: Electrokinetic System and Configurationmentioning

confidence: 99%

[Preprint] An overview of electrokinetic soil flushing and its effect on bioremediation of hydrocarbon contaminated soil

Ramadan¹,

effendi²,

Sari³

et al. 2018

Preprint

View full text Add to dashboard Cite

Combination of electrokinetic soil flushing and bioremediation (EKSF-Bio) technology has attracted many researchers attention in the last few decades. Electrokinetic is used to increase biodegradation rate of microorganisms in soil pores. Therefore, it is necessary to use solubilizing agents such as surfactants that can improve biodegradation process. This paper describes the basic understanding and recent development associated with electrokinetic soil flushing, bioremediation, and its combination as innovative hybrid solution for treating hydrocarbon contaminated soil.Surfactant has been widely used in many studies and practical applications in remediation of 2 hydrocarbon contaminant, but specific review about those combination technology cannot be found.Surfactants and other flushing/solubilizing agents have significant effects to increase hydrocarbon remediation efficiency. Thus, this paper is expected to provide clear information about fundamental interaction between electrokinetic, flushing agents and bioremediation, principal factors, and an inspiration for ongoing and future research benefit.

show abstract

Field application of electrokinetic remediation for multi-metal contaminated paddy soil using two-dimensional electrode configuration

Cited by 61 publications

References 36 publications

Removal of oxyfluorfen from spiked soils using electrokinetic soil flushing with linear rows of electrodes

Removal of oxyfluorfen from spiked soils using electrokinetic soil flushing with linear rows of electrodes

Application of Biosurfactants and Pulsating Electrode Configurations as Potential Enhancers for Electrokinetic Remediation of Petrochemical Contaminated Soil

[Preprint] An overview of electrokinetic soil flushing and its effect on bioremediation of hydrocarbon contaminated soil

Contact Info

Product

Resources

About