Recovery of Zinc Ions From the Resulting Solution after Copper Cementation with Metallic Zinc

Demirkıran, Nizamettin

doi:10.1080/01496395.2012.710702

Cited by 9 publications

(14 citation statements)

References 30 publications

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“…The more active metal dissolves anodically while noble metal ions deposit cathodically. Thus, the electrons required for the reduction of noble metal ions are provided by a charge exchange or metal displacement reactions [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Solid Solutions Formation Mechanism in Cordierite-Mullite Glass Materials During Ceramization

Саввова¹,

Voronov²,

Бабіч³

et al. 2020

ChChT

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Relevance of the development of high-strength glass-ceramic coatings obtained by resource-saving technology for protective elements has been established. Structure formation mechanism in magnesium aluminosilicate glasses during heat treatment has been analyzed. Selection of the system was substantiated, model glasses and glass-ceramic materials on its base have been developed. Patterns of structure regularity and formation of the phase composition of glass-ceramic materials during their ceramization have been investigated. It was established that the presence of crystalline phase of mullite after melting leads to formation of the primary crystals and allows the formation of the fine crystalline structure under conditions of the low-temperature heat treatment at the nucleation stage. Developed high-strength glass ceramic materials can be used as a base in creating protective elements for special-purpose vehicles by energy-saving technology.

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Section: Introductionmentioning

confidence: 99%

Solid Solutions Formation Mechanism in Cordierite-Mullite Glass Materials During Ceramization

Саввова¹,

Voronov²,

Бабіч³

et al. 2020

ChChT

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“…Therefore, recovering of zinc ions from this solution can be important both environmentally and economically. Zinc ions can be recovered from such a solution by various methods, like electrolysis and chemical precipitation (Demirkıran, 2013c). Hence, zinc can be recovered in addition to copper from malachite ore.…”

Section: Recovery Of Copper From Leach Solutionmentioning

confidence: 99%

Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide

Ekmekyapar

Demirkıran

Künkül

et al. 2015

Braz. J. Chem. Eng.

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-Malachite ore is one of the most important of oxidized copper ores. Copper production can be performed by using this ore. In this work, the leaching kinetics of malachite in ammonium sulfate solutions was investigated, and metallic copper was recovered by a cementation method from the resulting actual leach solution. Copper (II) oxide was prepared by an isothermal oxidation method from the cement copper. In the leaching experiments, the effects of reaction temperature, particle size, and stirring speed on copper leaching from malachite ore were studied. In the cementation experiments, metallic zinc was used as the reductant metal to recover the copper from the solution. Thermal oxidation of cement copper was performed under isothermal conditions. It was found that the leaching rate increased with increasing stirring speed and temperature, and decreased with particle size. It was observed that the leaching reaction fit to diffusion through the product layer. The activation energy of the leaching process was determined to be 25.4 kJ/mol. It was determined that the copper content of the metallic product obtained by the cementation method increased up to 96%. It was found that copper oxide prepared from cement copper had a tenorite structure.

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“…However, the diffraction peaks in this figure shows that the solid obtained by precipitation can be a zinc hydroxy‐carbonate product rather than pure zinc carbonate. In the literature, it has been stated that the precipitated product is usually in the form of hydroxy‐carbonates when zinc ions in an aqueous solution are precipitated with sodium carbonate and/or sodium bicarbonate 21,30‐32 …”

Section: Resultsmentioning

confidence: 99%

“…These values found are quite close to theoretical values. Hence, it can be expressed that the solid precipitate is predominantly Zn 3 CO 3 (OH) 4 21,30‐32 . In this case, the overall precipitation reaction taking place between zinc ions and sodium bicarbonate solution can be expressed as in Equation ):

{3Zn}^{2 +}_{(aq)} + {6NaHCO}_{3 ((), aq)} ⟶ {Zn}_{3} ((), {CO}_{3}) {(OH)}_{4 ((), s)} + {6Na}^{+}_{(aq)} + {5CO}_{2 ((), g)} + H_{2} O_{(normall)}

A SEM image given in Figure 13 for zinc hydroxy‐carbonate displays that the particles are in a highly agglomerated state.…”

Section: Resultsmentioning

confidence: 99%

“…After 120 min of reaction time, it was determined that the dissolution extent of zinc metal was to be approximately 97.2%. Because the precipitation conditions of zinc ions with sodium bicarbonate solution were determined in our previous study, 21 the effects of the parameters on the precipitation treatment were not investigated in this study. Thus, the precipitation pH, stirring speed, reaction temperature, and molar ratio of sodium bicarbonate/zinc ion were taken to be 8500 rpm, 60°C, and 2.5/1, respectively, in the precipitation experiment.…”

Section: Methodsmentioning

confidence: 99%

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Dissolution kinetics of metallic zinc obtained from spent zinc‐carbon batteries in nitric acid solutions

Demirkıran

Şenel

2020

Env Prog and Sustain Energy

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In this study, the dissolution kinetics of metallic zinc pieces obtained from waste zinc–carbon batteries was investigated using nitric acid solutions. The effects of the concentration of nitric acid, amount of metallic zinc, reaction temperature and stirring speed on the dissolution process were determined, and a mathematical model to represent the dissolution kinetics was presented. It was observed that the dissolution rate increased with increasing nitric acid concentration, stirring speed and reaction temperature and with decreasing amount of metallic zinc. While the concentration of nitric acid, reaction temperature, stirring speed, amount of zinc, and reaction time were 0.15 M, 30°C, 400 rpm, 0.1 g, and 20 min, respectively, the amount of dissolved zinc was found to be 98.3%. The result of the kinetic analysis showed that the dissolution rate fit to the pseudo‐first order kinetic. The activation energy for the dissolution process was calculated to be 12.89 kJ/mol. It was determined that the dissolution process was controlled by diffusion. Zinc ions in the resulting solution after the dissolution treatment was recovered by precipitation method using sodium bicarbonate solution. It was determined that zinc ions were precipitated as zinc hydroxy‐carbonate compound. Zinc compound obtained was subjected to the calcination treatment, and zinc oxide was produced.

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Recovery of Zinc Ions From the Resulting Solution after Copper Cementation with Metallic Zinc

Cited by 9 publications

References 30 publications

Solid Solutions Formation Mechanism in Cordierite-Mullite Glass Materials During Ceramization

Solid Solutions Formation Mechanism in Cordierite-Mullite Glass Materials During Ceramization

Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide

Dissolution kinetics of metallic zinc obtained from spent zinc‐carbon batteries in nitric acid solutions

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