On the electrodialysis of aqueous H2SO4–CuSO4 electrolytes with metallic impurities

Cifuentes, Luis Fernández; Crisóstomo, G.; Ibáñez, Joaquı́n; Casas, J. Manuel; Álvarez, F.; Cifuentes, Gerardo

doi:10.1016/s0376-7388(01)00733-5

Cited by 57 publications

(30 citation statements)

References 8 publications

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“…Anyway, presence of other substances in the wastewater would interfere with the actual speciation of arsenic, for example the presence of iron. Some early ED work has shown the possibility to separate copper from synthetic smelter wastewaters, where copper was in excess to arsenic (Cifuentes et al, 2002). In real wastewaters the arsenic content is higher than copper.…”

Section: Second Stage: Electrodialytic Separation Of Copper From Arsenicmentioning

confidence: 99%

A new process for sustainable wastewater treatment in Chilean copper smelters

2015

EJSD

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An actual Chilean copper smelter wastewater treatment is a complex process that actually mostly is focused on fulfillment of threshold values more than sustainability. The actual wastewater treatment includes a number of precipitation, neutralization, clarifying and filtering steps. This manuscript proposes a new sustainable process that would eliminate/reduce several of the disadvantages in an actual copper wastewater treatment such as a) reduced lime addition, b) a separate gypsum and heavy metal/arsenic precipitation, c) an electrodialysis stage that would recover copper, d) an easier ferric ion dosage for arsenic removal by electrocoagulation, and e) a less reagent consuming neutralization step.

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Section: Second Stage: Electrodialytic Separation Of Copper From Arsenicmentioning

confidence: 99%

A new process for sustainable wastewater treatment in Chilean copper smelters

2015

EJSD

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“…3 (B)), desde ST hacia el compartimento catiónico (CC), aumenta linealmente con la densidad de corriente aplicada. Este comportamiento lineal de la velocidad de transporte con i es característica de los procesos electro dialíticos [11][12][13][14] . El aumento del contenido de As (V) y Cu (II), en el compartimento aniónico y catiónico, respectivamente, se debe a la diferencia de potencial aplicado al sistema, el cual actúa como fuerza motriz para la migración de iones desde un sitio a otro.…”

Section: Cinética De Transporte Iónicounclassified

“…Este proceso se ha utilizado para diferentes aplicaciones que abarcan desde la recuperación de agua hasta el tratamiento de distintos efluentes [1][2][3][4][5][6][7][8][9][10] . En diferentes trabajos [11][12][13][14][15][16] se ha indicado el potencial uso de la electro diálisis en la separación y concentración de las especies de Cu (II) y As (V) en soluciones de ácido sulfúrico.…”

Section: Introductionunclassified

Modelado del transporte de As (V) en la capa de Nernst de una celda electro dialítica

Ibáñez¹,

Aracena²,

Cifuentes³

2012

REVMETAL

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The transport of As (V) oxianions was modeled through the boundary layer generated between the bulk of an acidic As (V) electrolyte and the surface of an anionic exchange membrane during a batch electro dialysis process without agitation. The model was adapted from one developed for the transport of Cu (II) ions in the Nernst layer under the same hydrodynamic and electric conditions. The model shows the flux of oxianions in terms of the difference between the transport number of As (V) in the boundary layer and in the membrane as a function of the current density. The model approaches to the experimental data when the transport number in the boundary layer is 1.5×10 -4 and 1.5×10 -5 for As (V)-H 2 SO 4 and As (V)-Cu (II)-H 2 SO 4 electrolytes, respectively. The validation of the model was made with published data of As (V) transport.

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“…Electrodialysis systems purify solutions using ionic exchange membranes 6,7,8,9,10,11 . Implementing the cathodic or anionic membranes enables the use of different work environments for the same working cell 12,13,14 .…”

Section: Introductionmentioning

confidence: 99%

Zinc Electrowinning Using Reactive Electrodialysis (Red)

Cifuentes

Bustos

Hernández

et al. 2014

J. Chil. Chem. Soc.

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This paper presents an alternative process for the conventional zinc electrowinning, which consists of a cell of two compartments separated by a anion exchange membrane.One of them contains a zinc sulphate catholyte and sulfuric acid while the anolyte solution contains ferrous sulfate and sulfuric acid.By using a membrane the classical lead anode may be replaced, as well as the main oxidation reaction of water, for that of the ferrous ion to ferric ion.This leads to significant savings in specific energy consumption of the overall process and eliminates the classic problem of acid mist in electrowinning cells.The results show that the proposed process consumes 30% less cell potential compared to conventional electrowinning cell.

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On the electrodialysis of aqueous H2SO4–CuSO4 electrolytes with metallic impurities

Cited by 57 publications

References 8 publications

A new process for sustainable wastewater treatment in Chilean copper smelters

A new process for sustainable wastewater treatment in Chilean copper smelters

Modelado del transporte de As (V) en la capa de Nernst de una celda electro dialítica

Zinc Electrowinning Using Reactive Electrodialysis (Red)

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