Electrokinetic remediation of manganese and zinc in copper mine tailings

Ortíz-Soto, Rodrigo; Leal, Daniela; Gutierrez, Carlos Enrique; Aracena, Álvaro; Rojo, Adrián; Hansen, Henrik K.

doi:10.1016/j.jhazmat.2018.11.048

Cited by 42 publications

(5 citation statements)

References 22 publications

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“…Total copper removal from the soil sample is an important parameter, indicating the EK treatments performance, which is determined from Eq. ( 2) [52]:…”

Section: Copper Extraction From Soilmentioning

confidence: 99%

Enhanced copper removal from contaminated kaolinite soil by electrokinetic process using compost reactive filter media

Ghobadi

Altaee

Zhou

et al. 2021

Journal of Hazardous Materials

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“…Total copper removal from the soil sample is an important parameter, indicating the EK treatments performance, which is determined from Eq. ( 2) [52]:…”

Section: Copper Extraction From Soilmentioning

confidence: 99%

Enhanced copper removal from contaminated kaolinite soil by electrokinetic process using compost reactive filter media

Ghobadi

Altaee

Zhou

et al. 2021

Journal of Hazardous Materials

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“…Combined with an eggshell inorganic part powder (EGGIF) permeable reactive barrier (PRB), artificial lead(II)-contaminated soil can be remediated through an electrodynamic process [19]. The effects of initial acidity and electric field strength on electrokinetic remediation of manganese and zinc in copper mine tailings in Chile have been experimentally investigated [20]. In addition, based on the conventional electrokinetic remediation technology, the electrochemical-coupled remediation method with electrolyte purification and recycling device has been adopted.…”

Section: Introductionmentioning

confidence: 99%

Study on Water-Heat-Solution Transport Law in Cr(VI)-Contaminated Soil during Electric Remediation

et al. 2022

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In order to understand the water-thermal-solute transport pattern during the electrokinetic remediation of Cr(VI)-contaminated soil, this study selected 2.46 m3 of Cr(VI)-contaminated soil from a chemical plant plot for an indoor experiment of electrokinetic remediation, which monitored the changes of three indicators of soil volumetric water content, temperature and Cr(VI) content over time under the conditions of a voltage of 90 V and 110 V and an electrode distance of 1.5 m for 7 days. A numerical model was also developed using the finite element software COMSOL, which was evaluated and calibrated to predict the changes in soil volumetric water content and hexavalent chromium concentration within 15 days. The results showed that the soil volumetric water content near the anode showed a decreasing trend at the beginning, and then gradually increased when the external supplemental water arrived. The decrease in soil volume water content became larger when the voltage increased. During the electrokinetic remediation experiment, the maximum temperature could reach 36.9 °C at 5 cm from the anode under the conditions of 90 V and 1.5 m distance between electrodes, while the maximum temperature could reach 52.4 °C at a voltage of 110 V. Moreover, the higher the voltage, the faster the temperature rise of the soil at the same location. A higher voltage increased the removal rate of hexavalent chromium, and the removal rate of hexavalent chromium in shallow soils was higher than that in deep soils. At 90 V and an electrode distance of 1.5 m, the removal rates of hexavalent chromium at sampling points 6 and 7 reached 66.03% and 60.80%, respectively. The removal rates of points 6 and 7 at 110 V were able to reach 75.96% and 70.74%, respectively.

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“…Although mining is critical to economic growth, it has signi cant environmental consequences that cannot be overlooked. The mining industry has a wide range of environmental effects on both small and large scales (Karaca et al 2019;Ortiz-Soto et al 2019). Mines produce 10,000 to 600,000 tons of tailings per year, which contain heavy metals, combustible materials, hazardous waste, and contaminating gases in varying concentrations.…”

Section: Introductionmentioning

confidence: 99%

Remediation of zinc from mine tailing using electrokinetic method combined with washing solvents

Karimi

Soltani

Falamaki

et al. 2022

Preprint

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Mining activities have resulted in a large amount of mineral tailings, which are potentially toxic and hazardous metals that contaminate the soils surrounding the mines. Because of the negative effects of potentially toxic elements on natural ecosystems, efficient solutions for soil and mineral tailings remediation are required. Several tailings samples were taken from various parts of the Anguran zinc mine to investigate the efficiency of electrokinetics. The total concentrations of soil elements were then determined using the standard ICP method. Several washing solutions with a fixed concentration of 0.1 M were used to assess the efficiency of electrokinetics in soil. The washing solutions included hydrochloric acid, nitric acid, acetic acid, and sulfuric acid. The solutions were mixed with soil in a 1:2 solution-to-solid ratio. Furthermore, for all experiments, a voltage of 1.5 V/cm was used. To prevent heavy metal deposition in the soil near the cathode chamber, the designated chemical filtration solutions were also used in the cathode chamber at a fixed concentration of 0.1 M. The experimental results revealed that metals such as zinc and lead were present in varying degrees in the tailed soil. The zinc heavy metal had the highest concentration in the tailed samples. The lowest zinc removal efficiency was obtained with distilled water, with a metal removal of 16%, indicating that electrokinetic remediation in soil has little effect. Our findings also show that electrokinetic soil remediation using a hydrochloric acid complexing agent is more effective than other agents, and that it can remove up to 64% of the zinc from mine tailing soil.

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Electrokinetic remediation of manganese and zinc in copper mine tailings

Cited by 42 publications

References 22 publications

Enhanced copper removal from contaminated kaolinite soil by electrokinetic process using compost reactive filter media

Enhanced copper removal from contaminated kaolinite soil by electrokinetic process using compost reactive filter media

Study on Water-Heat-Solution Transport Law in Cr(VI)-Contaminated Soil during Electric Remediation

Remediation of zinc from mine tailing using electrokinetic method combined with washing solvents

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