Effect of additives on monovalent copper electrodeposition in ammoniacal alkaline solutions

Oishi, Tadashi; Yaguchi, Miki; Koyama, Kazuya; Tanaka, Mikiya; Lee, J.-c.

doi:10.1016/j.hydromet.2012.11.015

Cited by 10 publications

(3 citation statements)

References 17 publications

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“…1 The reduction of the surface roughness of the electrodeposited copper films by additives and optimisation of the plating parameters was investigated in ammoniacal alkaline electrolytes. 2 Electrodeposition of copper from alkaline cyanide solutions is a well established industrial practice. 3,4 A detailed study of copper deposition on stainless steel from a copper sulphate bath had been carried out with the application of square wave pulse current and direct current.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition and characterisation of copper deposits from non-cyanide electrolytes

Sekar

Jagadesh

Bapu

2015

Surface Engineering

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Acid copper plating on mild steel metallic foil is very difficult due to the galvanic displacement reaction of copper on mild steel. This can be avoided by using a suitable complexing agent. The present investigation deals with the electrodeposition of copper from non-cyanide electrolytes using glycerol as complexing agent in an alkaline medium in the presence of gelatin, anisaldehyde, imidazole and peptone as additives. These additives influence the morphology of the deposited copper films by reducing the grain size, ensuring smoothness and brightness of the films. The additives also improve the throwing power of the depositing electrolytes. The X-ray diffraction pattern obtained for the electrodeposited copper film shows a polycrystalline and face centred cubic structure. The crystal size of the copper film was calculated using Debye Scherrer's formula. A uniform and pin hole free surface morphology was observed under SEM, which revealed the grain refining brought about by the additives.

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Section: Introductionmentioning

confidence: 99%

Electrodeposition and characterisation of copper deposits from non-cyanide electrolytes

Sekar

Jagadesh

Bapu

2015

Surface Engineering

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“…During the past two decades, investigators have put concentrated efforts to develop energy saving hydrometallurgical processes for the recycling of copper from the waste PCB. In this process, copper is leached in an ammoniacal alkaline solution (Alam et al 2007; Oishi et al 2007; Oishi et al 2013) capable of bringing copper in monovalent state by forming a copper-ammine couple. The leach liquor (electrolyte) is purified by solvent extraction after solid/liquid separation.…”

Section: Electrowinningmentioning

confidence: 99%

Role of electrochemical processes in the extraction of metals and alloys – a review

Shamsuddin,

Sohn

2023

Mineral Processing and Extractive Metallurgy: Transactions of t

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This review discusses the electrochemical principles involved in the recovery of metals from aqueous solutions and fused salt electrolytes. In this article we concentrate on electrolytic processing of different types of metals with an emphasis on the significant role of electrochemical principles together with free energy and activity in electrowinning and electrorefining of common and reactive metals. Based on discharge potentials, metals are classified into three categories with respect to their characteristics of deposition from aqueous electrolytes without hydrogen evolution, under hydrogen over-voltage, and only from fused electrolytes.

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“…It is very important that arsenic residues must be strictly restrained to be directly disposed of into the environment. In metallurgical and mining wastewaters (Sekula, 2008;Nazari et al, 2017), arsenic, usually with an extremely high concentration, is one of the main contaminants among other arsenic-associated minerals such as Cu, Fe, Pb, Zn, and Ni (Anderson and Twidwell, 2008;Oishi et al, 2008;Cheng et al, 2009). It is necessary to investigate an efficient process to remove arsenic from metallurgical wastewater in order to meet the environmental legislation.…”

Section: Introductionmentioning

confidence: 99%

Novel strategy for reusing agricultural mulch film residual by iron modification for arsenic removal in gold-smelting wastewater

et al. 2022

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In gold-smelting wastewater after the original treatment process of flocculation and precipitation using mainly lime, a mixture of As, Cu, Pb, Mn, Zn, Al, Ni, and Fe existed with an arsenic concentration of 813.07 mg/L and other ions’ concentration at ug/L levels. In this work, a new clean process of mainly adsorption with self-made adsorbent Fe-PE, which was synthesized by loading ferric lignin on agricultural mulch film residual, was investigated to purify and remove arsenic from gold-smelting wastewater. A batch of column experiments was investigated to explore the reaction behavior between wastewater and adsorbent Fe-PE. The results showed while operating the adsorption columns at a pilot scale for 68 days, the arsenic concentration in the effluent was below 0.5 mg/L, and there was no significant change in the concentration of co-existing metal ions, indicating that Fe-PE had a good selective adsorption performance for arsenic in wastewater. Furthermore, Fe-PE did not dissolve and release Fe ions in wastewater, and the whole process could not produce sludge. This work first suggested an efficient and potential application for the purification and removal of arsenic from gold-smelting wastewater with agricultural mulch film residual after chemical modification, which will provide a novel strategy for reusing the agricultural mulch film residual.

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Effect of additives on monovalent copper electrodeposition in ammoniacal alkaline solutions

Cited by 10 publications

References 17 publications

Electrodeposition and characterisation of copper deposits from non-cyanide electrolytes

Electrodeposition and characterisation of copper deposits from non-cyanide electrolytes

Role of electrochemical processes in the extraction of metals and alloys – a review

Novel strategy for reusing agricultural mulch film residual by iron modification for arsenic removal in gold-smelting wastewater

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