Field Application of In Situ Electrokinetic Remediation for As-, Cu-, and Pb-Contaminated Paddy Soil

Park, Geun-Yong; Jeon, Eun-Ki; Jung, Jinhong; Jung, Hong-Bae; Ko, Seung Hwan; Baek, Kitae

doi:10.1007/s11270-013-1698-7

Cited by 29 publications

(8 citation statements)

References 28 publications

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“…The flushing fluid removes pollution without significantly affecting the physical properties of the soil; the fluid may consist of water, when a highly soluble species is to be removed, or a surfactant solution, for low water-solubility species. This technology is for use in soils with low hydraulic-conductivity, and its efficiency has been demonstrated with inorganic species, soluble organics and non-soluble organics [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…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%

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

Risco

Rodrigo

Vizcaíno

et al. 2016

Chemical Engineering Journal

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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.

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Section: Introductionmentioning

confidence: 99%

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

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“…The soil sample used in this study was collected from a paddy rice field near a former refinery plant where was contaminated by As, Cu, and Pb . The sample was air‐dried and sieved with a 100 mesh size (150 µm).…”

Section: Methodsmentioning

confidence: 99%

Stepwise Sequential Extraction of As‐, Cu‐, and Pb‐Contaminated Paddy Soil

Kim

Yoo

Jeon

et al. 2014

CLEAN Soil Air Water

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Research ArticleStepwise Sequential Extraction of As-, Cu-, and Pb-Contaminated Paddy Soil In this study, we carried out sequential soil washing to investigate removal and fractionation change of arsenic (As), copper (Cu), and lead (Pb) contaminated soil.Stepwise extraction enhanced the extractability of metals compared to a single extraction. EDTA and basic conditions increased the extraction of As, while Cu and Pb were extracted more by acidic condition and EDTA. Alternate application of EDTA and NaOH was most effective and extracted 76% of As, 73% of Cu, and 83% of Pb. Fractionation analysis shows that the iron/manganese (Fe/Mn) oxyhydroxide fraction decreased in all metals. Especially, EDTA significantly decreased the fractionation of metals bound to Fe/Mn oxyhydroxide because of strong complexation of Fe-EDTA.Stepwise application of EDTA and NaOH can be used to simultaneously and significantly extract As, Cu, and Pb.

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“…19(5), p. 26~34, 2014 conducted an EK field test with stainless steel electrode for 100 day and achieved 63.8% removal for Pb and 39.5% removal for Cu. Kim et al (2013) reported effective circulation might enhance the performance of EK process because of a constant pH within the system. The removal efficiency was 43.2% for As, 17.7% for Cu and 81.2% for Pb with stainless electrode for 28 days.…”

Section: Electrokinetic (Ek) Remediation Is a Promising In-situmentioning

confidence: 99%

Remediation of Electroplating Contaminated Soil by a Field Scale Electrokinetic System with Stainless Steel Electrodes

Yuan¹,

Tsai²,

Hung³

2014

Journal of Soil and Groundwater Environment

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/V-s were observed and it increased with the potential gradient increased. The reservoir pH controlled at 7.0 ± 1.0 has been effectively diminished the clogging of most metal oxides. The best removal efficiency of Zn, Pb, and Ni was 78.4%, 84.3%, and 40.1%, respectively, in the field scale EK system applied 0.35 V/cm and 0.05 M lactic acid for 20 days. Increasing potential gradient would more effectively enhance metal removal than increasing concentration of processing fluid. The reservoir and soil temperatures were majorly related to potential gradient and power consumptio. A 4-16 o C above room temperature was observed in the investigated system. It was found that the temperature increase in soil transported the pore water and metals from bottom to the topsoil. This vertical transport phenomenon is critical for the electrokinetic process to remediate in-situ deep pollution.

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Field Application of In Situ Electrokinetic Remediation for As-, Cu-, and Pb-Contaminated Paddy Soil

Cited by 29 publications

References 28 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

Stepwise Sequential Extraction of As‐, Cu‐, and Pb‐Contaminated Paddy Soil

Remediation of Electroplating Contaminated Soil by a Field Scale Electrokinetic System with Stainless Steel Electrodes

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