Removal of heavy metals from kaolin using an upward electrokinetic soil remedial (UESR) technology

Wang, Jing‐Yuan; Huang, Xiangjun; Kao, Jimmy C.M.; Stabnikova, Оlena

doi:10.1016/j.jhazmat.2006.01.029

Cited by 41 publications

(22 citation statements)

References 31 publications

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“…The UESR reactor consisted of a cell, anode and cathode electrodes, a DC power supply, cathode chamber influent pipe, and cathode chamber effluent pipe [13]. The cell was equipped with a cap that had orifices, tubing and wiring.…”

Section: The Uesr Reactor Designmentioning

confidence: 99%

“…There were few researches on electrokinetic remediation of soil polluted with heavy metals and organic contaminants by horizontal DC in low permeability soils [10]. DC electric field applied to contaminated soil is horizontal one, but there it was known also some attempts to apply vertical electric field for the treatment of contaminated soil [11][12][13]. There has been no reported study on simultaneous removal of organic contaminants and heavy metals by vertical electric fields.…”

Section: Introductionmentioning

confidence: 99%

“…An upward electrokinetic soil remediation (UESR) process using vertical non-uniform electric field generated by pointshaped electrodes was proposed for removal of heavy metals from contaminated kaolins [13]. A non-uniform upward electric field was created between an anode embedded in soil and a cathode placed on the soil surface.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous removal of organic contaminants and heavy metals from kaolin using an upward electrokinetic soil remediation process

Wang

Huang

Kao

et al. 2007

Journal of Hazardous Materials

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Section: The Uesr Reactor Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simultaneous removal of organic contaminants and heavy metals from kaolin using an upward electrokinetic soil remediation process

Wang

Huang

Kao

et al. 2007

Journal of Hazardous Materials

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“…In geosciences, examples include water transport in unsaturated parts of the porous soils [3,4,5], monitoring of the oil / water interface in reservoir engineering [6,7], remediation (by electro-osmotic pumping) of soils contaminated by nonaqueous phase liquids (NAPLs) [8], monitoring of CO 2 sequenstration in the ground, healing of cracks of unsaturated clay-rocks by electro-osmotic pumping in civil engineering, and the study of diffusion of ionic species in unsaturated clay-rocks used as host formations for long-term storage of toxic wastes. To the best of our knowledge, our model is the first rigorous attempt to derive the governing equations that describe the effect of water saturation upon streaming potential and electro-osmosis.…”

Section: Introductionmentioning

confidence: 99%

Electrokinetic coupling in unsaturated porous media

Revil

Linde

Cérepi

et al. 2007

Journal of Colloid and Interface Science

214

337

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Abstract. We consider a charged porous material that is saturated by two fluid phases that are immiscible and continuous at the scale of a representative elementary volume. The wetting phase for the grains is water and the non-wetting phase is assumed to be an electrically insulating viscous fluid. We use a volume averaging approach to derive the linear constitutive equations for the electrical current density as well as and the seepage velocities of the wetting and non-wetting phases at the scale of a representative elementary volume. These macroscopic constitutive equations are obtained by volume-averaging Ampère's law together with the Nernst-Planck equation and the Stokes equations. The material properties entering the macroscopic constitutive equations are explicitly described as a function of the saturation of the water phase, the electrical formation factor, and parameters that describe the capillary pressure function, the relative permeability function, and the variation of electrical conductivity with saturation. New equations are derived for the streaming potential and electro-osmosis coupling coefficients. A primary drainage and imbibition experiment is simulated numerically to demonstrate that the relative streaming potential coupling coefficient depends not only on the water saturation, but also on the material properties of the sample as well as the saturation history. We also compare the predicted streaming potential coupling coefficients with experimental data from four dolomite core samples. Measurements on these samples include electrical conductivity, capillary pressure, the streaming potential coupling coefficient at various level of saturation, and the permeability at saturation of the rock samples. We found a very good agreement between these experimental data and the model predictions.

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“…Most bench-scale and large-scale laboratory and pilot-scale field studies on electrokinetic remediation and electro-assisted phytoremediation (EAPR) system performed to date have been horizontally one-dimensional (1D) [15,16,17]. Limited research has been conducted to study the effect of the vertically 1D electrode configuration on the efficiency of electrokinetic remediation and EAPR system [18,19,20]. Limited numerical sensitivity analyses have been performed on two-dimensional (2D) or axisymmetrical configurations (Renaud and Probstein 1987; Jin and Sharma 1991) and also on EAPR system [22].…”

Section: Introductionmentioning

confidence: 99%

Development of electrokinetic remediation for caesium: A feasibility study of 2D electrode configuration system

Putra

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Agar matrix was artificially contaminated with caesium and subjected to rapid assessment of electrokinetic treatment on the basis of the 2D electrode configuration. The effect of caesium concentration on the process was investigated using different electrode configuration (i.e. rectangular, hexagonal and triangular). During treatment the in situ pH distribution, the current flow, and the potential distribution were monitored. At the end of the treatment, the caesium concentration distribution was measured. The results of these experiments showed that for caesium contamination, pH control is essential in order to create a suitable environment throughout the agar matrix to enable contaminant removal. It was found that the type of electrode configuration used to control the pH affected the rate of caesium accumulation. All of the electrode configurations tested was effective, but the highest caesium extraction was achieved when the hexagonal pattern was used to control the pH. After 72 h of treatment at 50 mA, the concentration of caesium decreased gradually from the second and first layer of agar matrix throughout the cell, suggesting that most of the caesium was concentrated on the cathode part.

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Removal of heavy metals from kaolin using an upward electrokinetic soil remedial (UESR) technology

Cited by 41 publications

References 31 publications

Simultaneous removal of organic contaminants and heavy metals from kaolin using an upward electrokinetic soil remediation process

Simultaneous removal of organic contaminants and heavy metals from kaolin using an upward electrokinetic soil remediation process

Electrokinetic coupling in unsaturated porous media

Development of electrokinetic remediation for caesium: A feasibility study of 2D electrode configuration system

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