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The Effect of Nickel in Zinc Electrowinning
Advanced Materials Research, 2011The effects of nickel ions on the cathode polarization process, kinetics equation and parameters in zinc electrowinning have been investigated in this paper. The results of the experiments show that when [Ni2+] ≤ 4 mg•L-1, the current density increases with increasing concentration of Ni2+ and limiting current of the passive point reach maximum, which ...
Gang Xie +3 more
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Zinc electrowinning with 2‐butyne‐1,4‐diol
The Canadian Journal of Chemical Engineering, 1987AbstractThe beneficial effect of 2‐butyne‐1,4‐diol on zinc current efficiency in the presence of nickel impurity has been examined. Several techniques including HPLC, absorption spectrophotometry and constant current deposition experiments have shown that a trimer of 2‐butyne‐1,4‐diol is responsible for the removal of Ni ions from the electrolyte, thus
D. L. Piron, D. Mathieu, M. D'Amboise
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The electrowinning of zinc from sodium hydroxide solutions
Hydrometallurgy, 2014Abstract Electrodeposition of zinc in the sodium hydroxide solutions on a stainless steel cathode was systematically investigated by means of cyclic voltammetry, chronoamperometry and chronopotentiometry in this paper. It was revealed that the deposition process was controlled by mass transport, and the diffusion coefficient of Zn(OH) 4 2 − ions ...
Zhang, Yucheng +4 more
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Investigations of new anodic materials for zinc electrowinning
Transactions of the IMF, 2009AbstractA new group of anodic materials and lead–silver alloys, produced in various ways, used as anodes for zinc electrowinning have been investigated. The new anodic materials are composite coatings, deposited on lead–calcium rolled substrates, consisting of a lead matrix and a cobalt–titanium phase.
T. Dobrev +3 more
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Methanol Oxidation as Anode Reaction in Zinc Electrowinning
Journal of The Electrochemical Society, 2005In this study, different types of Pt- and PtRu-based electrodes were compared regarding their activity and stability for methanol oxidation in an acid zinc sulfate solution.
M. Wesselmark +2 more
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Influence of Co2+ ions on cathode behaviour during zinc electrowinning
Journal of Applied Electrochemistry, 1998The effect of Co2+ ions on zinc deposition from acidic sulfate electrolytes is investigated on the basis of steady-state polarization curves and impedance measurements. Hydrogen evolution is shown to be enhanced by adsorbed cobalt on both the zinc deposit and the aluminium substrate, and this stimulation occurs in combination with the catalytic effect ...
Dobrev, T. +2 more
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Cementation for metal removal in zinc electrowinning circuits
Minerals Engineering, 2005Step changes in technology, including adoption of new process configurations and chemistry, require modelling and experimental work for establishing process feasibility and process optimisation. In this work the results of such modelling and experimentation as applied to purification via zinc dust cementation of a zinc-bearing leachate are presented ...
S.J.G. Casaroli +4 more
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Voltammetric Evaluation of Zinc Electrowinning Solution Containing Nickel
Journal of The Electrochemical Society, 1980The effect of nickel impurity in zinc sulfate electrowinning solutions was studied using voltammetry techniques. The reactions occurring at various points on the polarization curve are proposed and comparisons made for both pure electrolyte and those containing nickel.
Yar‐Ming Wang +2 more
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Zinc Extraction from Zinc Plants Residue Using Selective Alkaline Leaching and Electrowinning
Journal of The Institution of Engineers (India): Series D, 2015Annually, a great amount of zinc plants residue is produced in Iran. One of them is hot filter cake (known as HFC) which can be used as a secondary resource of zinc, cobalt and manganese. Unfortunately, despite its heavy metal content, the HFC is not treated.
Pedram Ashtari, Parviz Pourghahramani
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Selective Acidic Leaching of Spent Zinc-Carbon Batteries Followed by Zinc Electrowinning
Metallurgical and Materials Transactions B, 2014In this work, a selective acidic leaching procedure was employed for recycling zinc from spent zinc-carbon batteries. Leaching experiments were carried out in order to maximize zinc recovery and minimize manganese recovery in diluted sulfuric acid media.
Hossein Shalchian +3 more
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