The treatment of cyanide from gold mine effluent by a novel five-compartment electrodialysis

Zheng, Ya-Jun; Li, Zhaokui; Wang, Xinyan; Gao, Xueli; Gao, Congjie

doi:10.1016/j.electacta.2015.04.015

Cited by 28 publications

(8 citation statements)

References 51 publications

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“…The applied voltage plays a role in the current formation of potentiostatic process. The current accumulation different is the driving force of the transport the ions across the membranes [26]. To study the influence of applied voltage in the lithium separation process, the voltage was varied in the range of 5-20 volts while the initial concentration of ions was kept constant (100 mg/L lithium and 300 mg/L cobalt).…”

Section: The Influence Of Applied Voltagementioning

confidence: 99%

Separation of Lithium Ion from Lithium-Cobalt Mixture using Electrodialysis Monovalent Membrane

Ariyanto¹,

Supranto²,

Prasetyo³

2018

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Electrodialysis is a separation process which ions are transported through semi permeable membranes under an influence of electric potential. In this research, electrodialysis using monovalent ion exchange membranes was applied to separate lithium ions from mixtures of lithium-cobalt aqueous solution. The study aims to examine factors that affect the performances of electrodialysis monovalent membrane, such as applied voltage, flow rate, and the concentration of cobalt as co-ion. The research was conducted using electrodialysis PC cell BED 64004, monovalent cation exchange membrane (PC-MVK) and monovalent anion exchange membrane (PC-MVA) produced by PCA-PolymerchemicAltmeier, GmbH, Heusweiler, Germany. The effect of applied voltage was studied by varying the voltage in the range of 1-4 volt/cell volt. The effects of flow rate and initial concentration of ion were studied by changing the flow rate (10, 15, and 20 L/h) and varying the ratio of initial concentration between Li and Co ions (100-100, 100-400, and 100-500 mg/L). The results exhibited that the highest separation capacity of lithium (99.40%) was obtained when using the optimum applied voltage of 1 volt/cell. Low energy consumption would be obtained when using a low voltage for the process separation. The optimum flow rate for the lithium separation using electrodialysis monovalent membrane in this research was 15 L/h. The greater flow rate reduced the current efficiency and increased the energy consumption. When the concentrations of cobalt were increased in the range of 100-500 mg/L, the results indicated a decrease of current efficiency but an increase of energy consumption showing the influence of concentration of cobalt to transportation of lithium ions and selectivity of monovalent membrane.

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Section: The Influence Of Applied Voltagementioning

confidence: 99%

Separation of Lithium Ion from Lithium-Cobalt Mixture using Electrodialysis Monovalent Membrane

Ariyanto¹,

Supranto²,

Prasetyo³

2018

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“…Thus, the mass transfer results in the increase of ion concentration in concentrate compartments and the decrease of ion concentration in diluate compartments. Based on this principle, material improvements, operation aspects, and innovative applications have been studied thoroughly with a review of literature related to electro‐membrane systems, but in‐depth study of the mass transfer phenomena is difficult due to complex experimental or theoretical analysis. The ambiguous transfer mechanism impedes the electrodialysis system operating in an effective and sustainable way for the desalination process.…”

Section: Introductionmentioning

confidence: 99%

Ion transfer modeling based on Nernst–Planck theory for saline water desalination during electrodialysis process

Zhu

Yang²,

Gao

et al. 2020

Asia-Pacific J Chem Eng

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Electrodialysis, an efficient and environmental friendly separation technology, plays a significant role in water treatment. In order to reveal ion transfer mechanism and predict electrodialysis behavior, a mathematical model for steady transport of a binary electrolyte during the desalination process was developed. The Nernst–Planck, electroneutrality equations, and other hydrodynamic equations were coupled and solved with appropriate boundary conditions using the finite element method. This model is capable to predict the local ion concentration, electric potential, and ion flux in a rectangular electrodialysis unit. The effects of voltage drop (0.4–1.0 V), inlet velocity (0.03–0.06 m/s), and initial feed concentration (500–700 mol/m3) are investigated, which could provide valuable guidance for electrodialysis operation in the practical project. Moreover, this model is validated by comparing its simulation result with experimental data of electrodialysis, and it could predict the desalination of saline water accurately. Ion transfer modeling provides an effective way to study the transfer mechanism, estimate the effects of various parameters conveniently, and realize the target‐oriented operation optimization.

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“…Worldwide there are many alternatives to remove cyanide and eliminate heavy metals; some of these alternatives have been applied to the treatment of mining effluents. [2][3][4][5][6][7][8][9]. The cyanide degradation with hydrogen peroxide has the objective to transform it in less toxic substances and more unstable, like cyanates, that in the presence of water, become into carbonates and nitrates [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of cyanide and heavy metals removal in liquid effluents from small mining’s gold benefit, by adsorption with activated carbon and hydrogen peroxide in Segovia, Antioquia

Estrada-Montoya

Franco

Vanegas

2020

DYNA

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The small gold mining generates toxic substances discharges, being an environmental problem. The objective was to evaluate the removal of cyanide and heavy metals, in liquid effluents from the gold benefit, by adsorption with activated carbon and hydrogen peroxide. The residues were first treated with carbon to determine the adsorption efficiency with 20, 40, 60 g of carbon / L of solution at times of 4, 8, 12 hours. Then hydrogen peroxide (1.0, 1.5, 2.0 liters of peroxide / Kg CN in solution, was added over 4 hours). The response variables were concentrations of cyanide, lead, zinc, iron. The best treatment with carbon was 60 g of carbon / L of solution and 12 hours of contact and for the process with hydrogen peroxide: 2 liters of H2O2 / Kg of CN in solution, during 4 hours. A flow chart and tables for the implementation of the process were designed.

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The treatment of cyanide from gold mine effluent by a novel five-compartment electrodialysis

Cited by 28 publications

References 51 publications

Separation of Lithium Ion from Lithium-Cobalt Mixture using Electrodialysis Monovalent Membrane

Separation of Lithium Ion from Lithium-Cobalt Mixture using Electrodialysis Monovalent Membrane

Ion transfer modeling based on Nernst–Planck theory for saline water desalination during electrodialysis process

Evaluation of cyanide and heavy metals removal in liquid effluents from small mining’s gold benefit, by adsorption with activated carbon and hydrogen peroxide in Segovia, Antioquia

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