Scale-up of electrokinetic process for dredged sediments remediation

Benamar, Ahmed; Ammami, Mohamed Tahar; Song, Yue; Portet‐Koltalo, Florence

doi:10.1016/j.electacta.2020.136488

Cited by 22 publications

(11 citation statements)

References 35 publications

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“…Scale-up considerations has been evaluated by researchers and found better results with large scale devices using lesser energy and additives. 27,28 There is a great potential for remediation of actual contaminated sites. However, there still exists a need for wellplanned and well-instrumented application of technology in the field.…”

Section: Discussionmentioning

confidence: 99%

Efficient Removal of Copper and Cadmium from Contaminated Soil Utilizing Electrokinetic Process

Saleem

2021

Yanbu Journal of Engineering and Science

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Present manuscript demonstrates the efficient removal of copper and cadmium from contaminated soil utilizing electrokinetic process. The results of systematic bench-scale study on improved extraction of copper and cadmium shows the suitability of process to decontaminate low permeable soil. The influence of operating parameters such as electrode material, soil pH, current density, soil temperature, inter-electrode spacing and initial soil moisture content on the decontamination performance is investigated. Study revealed that, removal of copper and cadmium reached to 89.4% and 62.7% respectively while using titanium electrodes. Removal efficiency improved with the increase in current density, soil temperature and initial soil moisture content. About 74.5% of copper removal achieved within 20 hours at soil temperature of 35°C and current density was kept at 9.3 mA/cm2. During this study, soil pH decreased from 6.7 to 2.4 near anode and reached up to 12.3 near cathode resulting in augmented metal removal. An improvement of 33% in removal efficiency observed when moisture content increased from 45% to 73%. Rate of metal removal increased as the inter-electrode spacing decreased to 15 cm, which demonstrated the highest copper removal at a current density of 9.3 mA/cm2. The maximum energy consumption found to be 5.2 kWh/m3 of soil volume demonstrated the economy of process, which can be scaled up at cleanup sites.

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Section: Discussionmentioning

confidence: 99%

Efficient Removal of Copper and Cadmium from Contaminated Soil Utilizing Electrokinetic Process

Saleem

2021

Yanbu Journal of Engineering and Science

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“…The effect of electrokinetic remediation of heavy metal contaminated soil is in uenced by many factors such as physical and chemical properties of soil, electrolyte, pH, electrode materials and electric eld deployment, etc. Control of electrolyte addition or pH is still the main measure to enhance the electrokinetic remediation effect at the laboratory scale and eld scale [10]. Ethylenediaminetetraacetic acid (EDTA) is the most commonly used chelating agent because of its strong chelating ability for heavy metals, low impact on soil properties, slow degradation by microorganisms, etc [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the cadmium and lead removal from three soils by electrokinetic remediation

Mei

2024

Preprint

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The use of citric acid and ethylenediaminetetraacetic acid disodium as electrolytes on the removal of lead and cadmium from three soils were investigated for the first time by electrokinetic remediation. The experimental results showed that: under the voltage gradient of 2 V/cm and remediation time of 4 d, the best electrolyte for brown soil (ZR) was EDTA, and the removal rates of Cd and Pb were 17.8% and 13.2%, which were lower than those of red soil (HR)and black soil (BR). It seemed that electrokinetic remediation was less effective for ZR due to the high soil pH, and could combined with other remediation techniques to improve the efficiency. For HR, extending the remediation time to 10 d, the Cd removal rate reached 91.1% when the electrolyte was citric acid, and the Pb removal rate reached 63.2% when the electrolyte was EDTA. For BR, it was more sensitive to electrokinetic remediation technology, and the focusing phenomenon was serious. The removal rate of Cd in S1 of BR1 was 99%, and the focusing phenomenon occurs in S4 and S5 zones, resulting in an average removal rate of 22%, which could be improved by cathodic control; the removal rate of Pb in S5 of BR2 was 84.8%, and the focusing phenomenon occurred in S1, which could be improved by anodic control.

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“…Among the available treatment options, electrokinetic (EK) decontamination is recognized as an effective technique for the removal of heavy metals from low-permeability porous matrices [ 12 ]. In addition, its feasible implementation both in situ and ex-situ and coupling with other remediation technologies, such as phytoremediation and Fenton processes, represent further advantages [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metals from dredging marine sediments via electrokinetic hexagonal system: A pilot study in Italy

Pasciucco,

Castagnoli

et al. 2024

Heliyon

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Scale-up of electrokinetic process for dredged sediments remediation

Cited by 22 publications

References 35 publications

Efficient Removal of Copper and Cadmium from Contaminated Soil Utilizing Electrokinetic Process

Efficient Removal of Copper and Cadmium from Contaminated Soil Utilizing Electrokinetic Process

Comparison of the cadmium and lead removal from three soils by electrokinetic remediation

Removal of heavy metals from dredging marine sediments via electrokinetic hexagonal system: A pilot study in Italy

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