Electrochemical studies of gold ore processing wastewater containing cyanide, copper, and sulfur compounds

Cheng, Stephen C.; Gattrell, M.; Guena, T.; MacDougall, B.

doi:10.1007/s10800-006-9203-2

Cited by 6 publications

(3 citation statements)

References 27 publications

(53 reference statements)

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“…Cada uno de estos métodos tiene sus propias aplicaciones específicas y ventajas, y su elección dependerá de las condiciones y requisitos específicos de la operación minera. La extracción de oro es una parte crucial del proceso de recuperación de metales preciosos y desempeña un papel fundamental en la industria de procesamiento de minerales (Cheng et al, 2006).…”

Section: Deposición Del Oro De La Solución Cianuradaunclassified

Uso del amonio cuaternario en la separación de cobre y recuperación de cianuro en la extracción de metales por lixiviación

Poma,

Guevara

2024

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En empleo del amonio cuaternario, en la extracción de metales por lixiviación, tiene como objetivo adsorber y recuperar el cianuro, mitigando los riesgos ambientales. El objetivo del presente libro consistió en evaluar el impacto de la concentración de amonio cuaternario, el pH y la temperatura en un proceso de precipitación química a nivel de laboratorio, con el objetivo de entender su influencia en la remoción de cobre de soluciones cianuradas. El enfoque principal del estudio fue la regeneración del cianuro, con la intención de reutilizarlo en el proceso de lixiviación de oro, con miras a mejorar la eficiencia global de dicho proceso. Para llevar a cabo las pruebas experimentales, se preparó una solución sintética utilizando sulfato de cobre y cianuro de sodio, con concentraciones equivalentes a entornos industriales (700 ppm de cobre y 2500 ppm de cianuro). Los experimentos, bajo un diseño factorial 23, abarcaron dos niveles de concentración de amonio cuaternario (2,5 g/L y 7,5 g/L), dos niveles de pH (8 y 10), y dos niveles de temperatura (17 °C y 22 °C). Se evaluó la concentración de cobre por ICP-OES al final de cada prueba. La eficacia de la remoción se midió comparando el cobre eliminado por precipitación con la cantidad inicial en la solución cianurada. En promedio, se removió hasta un 92,93% de cobre, logrado con 7,5 g/L de amonio cuaternario, pH 8 y 22 °C. Se observó que mayor concentración de amonio cuaternario y temperatura elevada aumentaron la remoción, pero un pH alto redujo la eficacia de remoción de cobre.

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Section: Deposición Del Oro De La Solución Cianuradaunclassified

Uso del amonio cuaternario en la separación de cobre y recuperación de cianuro en la extracción de metales por lixiviación

Poma,

Guevara

2024

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“…Electrochemical methods including electrodialysis, electrocoagulation, − electrooxidation, − and electroreduction − have drawn more and more attention. Gonzalez et al confirmed the potential of electrochemical methods in treating electroplating wastewater through a series of studies. − Compared with other methods, the advantages of electrochemical methods include lower operating costs and less usage of extra chemical reagents and simultaneous achievements of fairly pure metals and removal of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Silver Recovery and Cyanide Removal from Electroplating Wastewater by Pulse Current Electrolysis Using Static Cylinder Electrodes

Gao

Zhou

Wang

et al. 2013

Ind. Eng. Chem. Res.

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An effective electrochemical approach for simultaneous silver recovery and cyanide removal from electroplating wastewater was presented. Accordingly, pulse current (PC) electrolysis with parameters including voltage (4.0 V), frequency (800 Hz), and duty cycle (50%) were settled using static cylinder electrodes. Then the influences of technological conditions on the electroplating wastewater treatment process were investigated, which manifested that the concentration of silver ions in electroplating wastewater could be reduced from 221 to 0.4 mg L −1 and cyanide could be simultaneously removed from 157 to 4.9 mg L −1 after 3.0 h of PC electrolysis at pH 9.5 ± 0.5, aeration rate of 100 L h −1 , and stirring speed of 1000 rpm with NaCl addition of 0.05 mol L −1 at room temperature. The results of XRD and EDX analysis showed that the silver deposits on the cathode were crystalline in face centered cubic structure and had a high purity.

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“…The development of various techniques for studying the mechanisms of corrosion and corrosion protection has, on the one hand, brought quite satisfactory results, but, on the other hand, they have aroused a lot of critical remarks as to the interpretation of the differences between individual physical models [1][2][3][4][5][6]. Even simple models appeared to be controversial [7,8].…”

Section: Introductionmentioning

confidence: 99%

Straightforward energetic approach to studies of the corrosion behaviour of nano-copper thin-layer coatings

Trzaska

2007

J Appl Electrochem

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This paper presents a one-period energy method of studying the electrochemical corrosion phenomena that occur on metal surfaces. The method employs the energy state variables (time functions) to determine whether the material is susceptible to corrosion. The main feature of this approach is the elimination of the frequency analysis, and thereby gives significant simplifications of the corrosion rate measurement. Another important feature is that the method is based on an analysis of the appropriate loops on the energy phase plane which results in the corrosion process being easily estimated through the evaluation of the loop area. The physical results obtained by this method are easily interpretable with robust properties. The usefulness of the proposed technique was examined in microcrystalline and nanocrystalline copper layers deposited on a polycrystalline substrate by the electrocrystallization method. The quantitative results obtained from the measurements of the one-period energy loops are used for controlling the corrosion resistances of the micro-and nano-copper thin-layer coatings. Several experiments performed on real specimens verified the effictiveness of the method as used for analysing the electrochemical corrosion in many practical systems. We have shown that the corrosion resistance of the nanocrystalline copper layers is worse than that of microcrystalline copper layers even when the layers of the two types are produced by the same electrochemical method.

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Electrochemical studies of gold ore processing wastewater containing cyanide, copper, and sulfur compounds

Cited by 6 publications

References 27 publications

Uso del amonio cuaternario en la separación de cobre y recuperación de cianuro en la extracción de metales por lixiviación

Uso del amonio cuaternario en la separación de cobre y recuperación de cianuro en la extracción de metales por lixiviación

Simultaneous Silver Recovery and Cyanide Removal from Electroplating Wastewater by Pulse Current Electrolysis Using Static Cylinder Electrodes

Straightforward energetic approach to studies of the corrosion behaviour of nano-copper thin-layer coatings

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