Remediation of Clayey Soil Contaminated with Copper Sulfate Using Washing-Enhanced Electrokinetics Technique

Karkush, Mahdi O.; Ali, Shahad

doi:10.1134/s1023193519130020

Cited by 5 publications

(8 citation statements)

References 21 publications

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“…The fieldwork involves soil sampling and measuring the field total density and moisture content. However, the laboratory work includes investigating the influence of EK method remediation on the geotechnical and chemical properties of soil samples contaminated with copper sulfate by conducting a wide range of traditional laboratory tests (Karkush and Ali, 2019a).…”

Section: Experimental Workmentioning

confidence: 99%

“…The natural soil samples are obtained from Al-Ahdab oil field in the east of Iraq by digging a trial pit to a depth of 3 m under the ground level (GL) and the groundwater table encountered at depth of 2.65 m from the GL. The field density of soil was 1984 kg/m 3 measured according to ASTM (D2937) and the water content was 28.6% measured according to ASTM (D2216) (Karkush and Ali, 2019a).…”

Section: Soil Sampling and Field Testsmentioning

confidence: 99%

“…The purging solutions used in this study are 0.001 M of nitric acid (HNO 3 ) at the anode, mid, and cathode compartments at the beginning of the test. When the pH value at the anode compartment reaches to a value about 2, the purging solution is replaced by 0.1 M of sodium hydroxide (NaOH) to keep the value of pH higher than 2 to prevent the reverse electroosmotic flow from occurring (Karkush and Ali, 2019a). Also, the anolyte was circulated with controlled constant flow rate during the test as shown in Figure 1.…”

Section: Remediation Of Contaminated Soil Samplesmentioning

confidence: 99%

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Influence of remediation by electrokinetic on the chemical and geotechnical properties of clayey soil contaminated by copper sulfate

Karkush,

Ali,

Bakr

2023

Earth sci. res. j.

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The enhanced electrokinetic (EK) technique is an innovative approach and increasingly used in remediation of the fine-grained texture soils contaminated with different types of contaminant. In this study, the EK is enhanced by adding an intermediate compartment and using purging solutions at the electrode’s compartments. The natural clayey soil samples were obtained from Al-Ahadab oil field and artificially contaminated with two ratios of copper sulfate (66666.67 and 26666.67 mg/kg). The feasibility of using EK technique was evaluated by the efficiency of extracting copper from soil and the magnitude of recovery in the geotechnical properties of soil. The duration of remediation was continued for about 240-250 hours depending either on the continuity of electroosmosis flow or reach a constant rate of electrical current. The removal efficiency of copper from contaminated soil samples was ranged from 98.4% to 99.6%. The EK remediation technique proved a marginal impact on the specific gravity and Atterberg’s limits, but it has a significant effect on the shear strength parameters and compressibility of soil. Furthermore, the EK technique can be considered an efficient method for removing the low and high concentrations of copper sulfate from clayey soil of low permeability.

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Section: Experimental Workmentioning

confidence: 99%

Section: Soil Sampling and Field Testsmentioning

confidence: 99%

Section: Remediation Of Contaminated Soil Samplesmentioning

confidence: 99%

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Influence of remediation by electrokinetic on the chemical and geotechnical properties of clayey soil contaminated by copper sulfate

Karkush,

Ali,

Bakr

2023

Earth sci. res. j.

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“…Many studies used various mathematical modeling to control the propagation of salt wedges, which studied a large turbulent channel flow eddy on one wall with transverse roughness features. The quality of water and soil significantly impacted the properties of porous media and water flow in the porous media and open channels [1][2][3][4][5]. Dritselis [6] investigated the viability of using a large eddy simulation to estimate turbulent channel flows with transversely positioned two-dimensional roughness features of square, circle, and triangle shapes on the bottom wall.…”

Section: Introductionmentioning

confidence: 99%

“…The first roughness element is relatively small and is located close to the point of vanishing skin friction, and the second roughness element is significantly larger and extends downstream [9]. Prasad et al [5] conducted a study on the effect of river discharges controlled by a dam and tidal currents on the salt wedge intrusion in the Godavari River estuary on the east coast of India. The results show that the discharge of rivers during the rainy season and the tide currents during different seasons impacted the incursion of salts around the river mouth.…”

Section: Introductionmentioning

confidence: 99%

Using CFD Modeling to Simulate the Control of the Propagation of Salt Wedge using Inclined Roughness Elements

Badr,

Azzubaidi

2023

E3S Web Conf.

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This research aims to simulate and use Computational Fluid Dynamics, CFD, to control the propagation of salt wedges. The flume has a cross-section of 25 cm in height and 7.5 cm in width with a length of 6 m and a zero slope. The simulated model is used to investigate the use of inclined roughness elements to control the propagation of salt wedges. The elements are blocks of 2 cm by 3 cm cross-sections having an inclined face in the direction of the flow, with a length of 2 and 3 cm. These elements were installed in two rows at both sides of the bed of the flume with variable spacing between them in the direction of the flow, and their centerline is inclined by an angle of 30 degrees in the direction of the flow. The simulation model was validated by comparing its output with a published laboratory experiment. Ten CFD model runs were conducted under two different discharges and five different spacing between the inclined roughness elements. The used discharges are 30 l/min and 45.3 l/min, and the spacing between elements was 3, 6, 9, 12, and 15 cm. The results demonstrated a good relationship between the obtained model runs and the observations of the laboratory experience under the same conditions. The result showed that when no roughness elements were used, the propagation of the salt wedge extended to 3.9 and 3.1 m at a discharge of 30 l/min and 45.31 l/min, respectively. The propagation of the salt wedge is reduced as the spacing increases to some limit and then starts to decrease when you use roughness elements. At the maximum applied discharge of 45.3 l/min, the propagation of the salt wedge was reduced by 82, 84, and 85% when the spacing between the blocks is 3, 6, and 9 cm, respectively. The percentage of reduction in the propagation of the salt wedge starts to reduce to 79% and 75% as the spacing between the blocks is increased to 12 and 15 cm, respectively. When the discharge is 30 l/min, the propagation of the salt wedge is reduced by 76, 74, and 78% at a spacing of 3, 6, and 9 cm, respectively. At the same time, the propagation is reduced by 58% at 12 cm and 53% as the spacing is increased to 12 and 15 cm.

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The Effect of Electric Field on the Settlement Behavior to Improve Gypseous Soil

Talib

Aljanabi

2022

Geotechnical Engineering and Sustainable Construction

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Remediation of Clayey Soil Contaminated with Copper Sulfate Using Washing-Enhanced Electrokinetics Technique

Cited by 5 publications

References 21 publications

Influence of remediation by electrokinetic on the chemical and geotechnical properties of clayey soil contaminated by copper sulfate

Influence of remediation by electrokinetic on the chemical and geotechnical properties of clayey soil contaminated by copper sulfate

Using CFD Modeling to Simulate the Control of the Propagation of Salt Wedge using Inclined Roughness Elements

The Effect of Electric Field on the Settlement Behavior to Improve Gypseous Soil

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