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Bounoughaz, M.; Salhi, E.; Benzine, K.; Ghali, Edward; Dalard, F.

doi:10.1023/a:1022824813564

Cited by 17 publications

(4 citation statements)

References 2 publications

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“…The chemical composition analysis of the sphalerite sample was carried out using X-supreme 600 model from Oxford Instruments. The result show the major oxides contained in the ore as ZnO (31.67 %), SO 3 1.…”

Section: Materials and Methods 21 Materialsmentioning

confidence: 97%

“…Zinc acts as the anode (negative terminus) by slowly corroding away as it passes electric current to the steel pipeline. Zinc is also used to cathodically protect metals that are exposed to sea water from corrosion [3]. The recovery of zinc from sphalerite has been carried out using organic and inorganic acids such as acetic acid [1], hydrochloric acid [4], sulpuric acid [5], and nitric acid [6], with varying percentages of zinc recovery.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Zinc Recovery from Sphalerite Using Response Surface Methodology and Particle Swarm Optimization

Onukwuli

Nnanwube

2021

Period. Polytech. Chem. Eng.

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Hydrometallurgical leaching process has been identified as a viable procedure for recovering metals of value from their matrices. The optimization of zinc recovery from sphalerite in nitric acid solution was carried out in this study. The Central Composite Rotatable Design (CCRD) of Response Surface Methodology (RSM) and Particle Swarm Optimization (PSO) tool in matlab were deployed for the optimization studies. RSM modeling gave optimum conditions of 73.0 °C leaching temperature, 3.48 M acid concentration, 0.027 g/mL solid/liquid ratio, 411.02 rpm stirring rate, and 82.82 minutes leaching time; with a zinc yield of 87.67 %. With PSO, about 86.9 % zinc was recovered at a leaching temperature of 69.1 °C, acid concentration of 1.8 M, solid/liquid ratio of 0.031 g/mL, stirring rate of 270 rpm and leaching time of 85 minutes. Thus, PSO and RSM proved to be good optimization tools.

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Section: Materials and Methods 21 Materialsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Optimization of Zinc Recovery from Sphalerite Using Response Surface Methodology and Particle Swarm Optimization

Onukwuli

Nnanwube

2021

Period. Polytech. Chem. Eng.

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“…2.5 times lower in comparison with annealed composite. This behavior may be attributed to an increase in real surface area [26] of Zn-Ni-P+Ni coating caused by thermal treatment. What is more, the oxide layer formed on both as-deposited and annealed in argon Zn-Ni-P+Ni composite coatings has c.a.…”

Section: Eis Spectramentioning

confidence: 99%

Corrosion resistance of ZnNiP+Ni composite coatings

Kubisztal¹,

Niedbała²,

Budniok³

2010

Surface & Interface Analysis

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Zn-Ni-P+Ni composite coatings were prepared by embedding nickel particles into Zn-Ni-P alloy using ammonia solution in which Ni powder was suspended by stirring. Such coatings have been deposited on a 0H18N9 stainless steel substrate under galvanostatic conditions (j = −40 mA cm −2 ), and at a temperature of 293 K. In order to investigate corrosion properties of the as-deposited and annealed (593 K for 2 h in argon atmosphere) Zn-Ni-P+Ni composite coatings in 5% NaCl environment potentiodynamic technique and electrochemical impedance spectroscopy (EIS) were used. It was stated that thermal treatment strongly improved the corrosion parameters of the examined Zn-Ni-P+Ni composite coatings, and also that better corrosion properties result from i) improved corrosion properties of the oxide layer; and ii) the presence of new γ Ni 5 Zn 21 phase in composite matrix.

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“…J Fundam Appl Sci. 2022, 14 (2), 391-416 397 rates, as compared to desired zinc reduction [49][50][51] The dissolution mechanism in zinc electrowinning electrolyte of 59 g.L -1 Zn 2+ and 160 g.L -1 H2SO4 at 38 ℃ can be suggested as follows.…”

Section: Potentiodynamic Polarization Curvesmentioning

confidence: 99%

Electrochemical behavior of zinc anode in acidic zinc electrolyte -influence of lead as an impurity in zinc anodic dissolution

Kherrab-Boukezzata,

Ghemmit-Doulache,

Bounoughaz

et al. 2023

J. Fundam and Appl Sci.

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Zinc is common metal used for steel protection. In this work, an alloy Zn-1 % wt. Pb was prepared by fusion at 500°C. The analysis of the corrosion behavior was studied with pure Zn anode as control in aerated solution of 0.9 M ZnSO4.7H2O + 1.63 M H2SO4 at 38°C.The effect of lead impurity on corrosion resistance of zinc anode in zinc electrorefining process was investigated using open circuit potential (OCP), Tafel plots, chronoamperometry at imposed constant anodic potential and electrochemical impedance spectroscopy (EIS) techniques. Samples were characterized by chemical analysis, optic microscope (OM) and X-ray diffraction (XRD). The results show that the lead impurity leads to degradation of the behavior of the alloy due to negative effect on the microstructure. Lead increases the corrosion rate and decreases the corrosion resistance of Zn-1 % wt. Pb alloy.

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Cited by 17 publications

References 2 publications

Optimization of Zinc Recovery from Sphalerite Using Response Surface Methodology and Particle Swarm Optimization

Optimization of Zinc Recovery from Sphalerite Using Response Surface Methodology and Particle Swarm Optimization

Corrosion resistance of ZnNiP+Ni composite coatings

Electrochemical behavior of zinc anode in acidic zinc electrolyte -influence of lead as an impurity in zinc anodic dissolution

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