Simulation of Unenhanced Electrokinetic Process for Lead Removal from Kaolinite Clay

Asadollahfardi, Gholamreza; Rezaee, Milad; Mehrjardi, Gholamhosein Tavakoli

doi:10.1007/s40999-016-0049-7

Cited by 13 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Miao and Pan built a numerical model to predict remediation of nuclear waste-contaminated soil under the direct current electric field, and the model results agreed with the tests' results [18]. Asadollahfardi et al proposed an explicit finite difference model to simulate lead removal from kaolinite clay under EKR process and their simulation results were consistent with the experimental data [19]. Rezaee et al presented a model to simulate remediation of zinc and copper contaminated soils under EKR process considering different chemical reactions and they reported that their model was capable of simulating the remediation process [20].…”

Section: Introductionsupporting

confidence: 52%

Mathematical Modeling and Sensitivity Analysis on Cadmium Transport in Kaolinite under Direct Current Electric Field

2017

Self Cite

View full text Add to dashboard Cite

Soil pollution is a challenging concern for environmentalists. Different remediation methods have been proposed to remediate polluted soils. Most of the existing methods cannot purify low permeable soils. Electrokinetic remediation (EKR) is an effective method which can remediate fine-grained soils. Understanding the physicochemical phenomena of the EKR is necessary to achieve efficient experimental framework. Therefore, the present study aims to introduce a theoretical and mathematical model for the EKR process. In the present model, different transport phenomena including ion migration, electroosmotic flow, and diffusion were considered. In addition, Chemical reactions such as adsorption/desorption, precipitation/dissolution, water autoionization reaction, and electrolysis reaction were considered. For modeling purpose, a set of partial differential and algebraic equations were used to model the remediation process. The implicit finite difference numerical model showed a good capability of simulating the EKR process. The sensitivity analysis on the retardation and tortuosity factors represented that the retardation factor had a considerable effect on the pH and cadmium concentration profiles. Although tortuosity factor did not have a significant impact on the pH profile, it had a non-negligible effect on the cadmium concentration profile.

show abstract

Section: Introductionsupporting

confidence: 52%

Mathematical Modeling and Sensitivity Analysis on Cadmium Transport in Kaolinite under Direct Current Electric Field

2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Proton and hydroxide transportation into the soil causes acid and base front movement which results in changing soil pH. When acid and base front meet each other, a jump happens in the pH profile [23,38] as simulated by the present model for experiment 1 (EKR of zinc-contaminated soil) (Figure 3). The experimental measurement was not available to validate pH prediction, yet our prediction is consistent with the pH profile in the soil under unenhanced EKR tests reported by others [12,13,23].…”

Section: Resultsmentioning

confidence: 82%

“…When acid and base front meet each other, a jump happens in the pH profile [23,38] as simulated by the present model for experiment 1 (EKR of zinc-contaminated soil) (Figure 3). The experimental measurement was not available to validate pH prediction, yet our prediction is consistent with the pH profile in the soil under unenhanced EKR tests reported by others [12,13,23]. In the unenhanced test, pH of a soil near the anode compartment decreased to 2, and near the cathode compartment increased to values around 11 [12,13,18] which is in agreement with pH predicted by our model.…”

Section: Resultsmentioning

confidence: 83%

“…2) through the tortuosity factor [29]. In the present study the electric field was assumed to be constant during the simulation [18,23].…”

Section: Transport Phenomenonmentioning

confidence: 99%

“…Miao and Pan simulated the EKR of nuclear waste-contaminated (uranium dioxide) soil and they reported acceptable agreement between their model and the experiment [22]. Asadollahfardi et al proposed a numerical model for unenhanced EKR of lead-contaminated soil and they reported that their model results were in a good agreement with the experiments [23].…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Electrokinetic Remediation of Zinc and Copper Contaminated Soil: A Simulation-based Study

Rezaee¹,

Ghomesheh²,

Hosseini

2017

cej

Self Cite

View full text Add to dashboard Cite

Electrokinetic is an effective and innovative method to remediate different kinds of soils, especially low permeable finedgrain soils such as silty and clayey soils. In this method, by applying a direct-current electric field into a contaminated soil resulted in different transport phenomena, the soil is remediated. This paper's objective is to propose a numerical model for Electrokinetic remediation of zinc and copper contaminated soils. Different transport phenomena including ion migration, electroosmosis flow, and diffusion were taken into account in the model. Chemical reactions such as precipitation/dissolution, adsorption onto the soil surface, and water chemical equilibrium were considered as well. Furthermore, instead of simplified boundary conditions (Neumann or Dirichlet) that cannot properly reflect the reality of the Electrokinetic remediation process, the realistic boundary conditions were used with consideration of flux and electrolysis reaction at the electrodes. The simulation results compared with the available experimental data in the literature. The coefficient of determination and the index of agreement indicated that the present model is consistent with the tests' results. Thus, the assumptions considered in the present study are acceptable.

show abstract

An Implicit Finite Difference Model for Electrokinetic Remediation of Cd-Spiked Kaolinite Under Acid-Enhanced and Unenhanced Conditions

Rezaee

Asadollahfardi

2018

Environ Model Assess

View full text Add to dashboard Cite

Simulation of Unenhanced Electrokinetic Process for Lead Removal from Kaolinite Clay

Cited by 13 publications

References 20 publications

Mathematical Modeling and Sensitivity Analysis on Cadmium Transport in Kaolinite under Direct Current Electric Field

Mathematical Modeling and Sensitivity Analysis on Cadmium Transport in Kaolinite under Direct Current Electric Field

Electrokinetic Remediation of Zinc and Copper Contaminated Soil: A Simulation-based Study

An Implicit Finite Difference Model for Electrokinetic Remediation of Cd-Spiked Kaolinite Under Acid-Enhanced and Unenhanced Conditions

Contact Info

Product

Resources

About