Bioleaching kinetics of copper from copper smelters dust

Bakhtiari, Fereshteh; Atashi, Hossein; Zivdar, Mortaza; Seyedbagheri, Seyedali; Fazaelipoor, Mohammad Hassan

doi:10.1016/j.jiec.2010.10.005

Cited by 45 publications

(9 citation statements)

References 19 publications

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“…Samples were collected over a seven-day period during the smelting process and mixed to obtain a representative sample. Chemical and mineral analysis of the dust showed that it contained 36% Cu and 22.2% Fe and major copper sulfide minerals in the dust were chalcocite 19%, chalcopyrite 2%, covellite 2% and bornite 3% .The acid soluble copper content of the dust was 13% [42][43][44].…”

Section: Methodsmentioning

confidence: 98%

Synthesis and characterization of tenorite (CuO) nanoparticles from smelting furnace dust(SFD)

Darezereshki

Bakhtiari

2013

J min metall B Metall

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Tenorite (CuO) nanoparticles were prepared from a dilute CuSO4 solution. The solution was obtained by leaching (pH=1.5) of smelting furnace dust of Sarcheshmeh Copper Complex, Iran. The recovery of copper from the acidic sulphate solution was carried out by solvent extraction using Lix 984-N. Tenorite nanoparticles were synthesized by direct thermal decomposition of Langite [Cu4(OH)6SO4(H2O)2] as a precursor which was calcinated in air for 2 h at 750°C. The Samples were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. The average diameter of the spherical pure CuO nanoparticles and their crystallite size were estimated to be 92 nm and 40nm, respectively. The simplicity of the present method suggests its potential application at industrial scale as a cheap and convenient way to produce pure CuO nanoparticles from dilute CuSO4 solutions obtained from leaching of smelting furnace dust

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Section: Methodsmentioning

confidence: 98%

Synthesis and characterization of tenorite (CuO) nanoparticles from smelting furnace dust(SFD)

Darezereshki

Bakhtiari

2013

J min metall B Metall

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“…To identify the rate-controlling step, SCM was applied. According to the SCM, either the step "diffusion through the ash layer" or "chemical reaction" may control the rate of bioleaching [15]. The mathematical models of the earlier mentioned steps are given in Eqs.…”

Section: Methodsmentioning

confidence: 99%

Kinetics of Iron Bioleaching using Isolated Leptospirillum Ferriphilum: Effect of Temperature

S*¹,

Ramesh.²,

Adugna³

et al. 2019

IJITEE

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This study was designed to investigate the effect of temperature on iron bioleaching kinetics using Leptospirillum ferriphilum. The bacteria were isolated and subjected to molecular characterization technique for confirming L. ferriphilum. Using the isolate, bioleaching data were collected in the temperature range of 298–318 K at an initial pH of 1.5 and 5% pulp density with an average particle size being 300 µm. The results of experiments concluded that leaching efficiency increases with temperature and maximum of 93.85% were observed after 20 days at 313 K. The bioleaching kinetics indicated that the maximum rate (rate constant: 0.1452 d1 ) was found in the experiment conducted at the optimum temperature, and the rate-controlling step was “diffusion through ash layer.” The activation energy was calculated to be 37.59 kJ/mol. From the thermodynamic study of the bioleaching system, ∆H˚ and ∆S˚ were found to be 0.7399 × 10−3 and 28.512 J/mol, respectively

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“…Thus, it is evident that optimal Fe(II) concentration of 7 g/L is appropriate for iron-based bioleaching of the type of sphalerite used with L. ferriphilum. Approximately 85%-100% of zinc leaching efficiency has been accounted for somewhere else, which relies upon the type of mineral concentrate, microorganism, and conditions present during bioleaching [21][22][23]. The bioleached residue obtained at the flask using media with 7 g/L Fe(II) was subjected to energy-dispersive X-ray (EDX) analysis to analyze leached out zinc.…”

Section: Effect Of Fe(ii) On Bioleaching Of Zincmentioning

confidence: 99%

Effect of FE(II) Concentration on Bioleaching of Zinc from Sphalerite using Leptospirillum Ferriphilum: Kinetic Aspects

S*,

Adugna

et al. 2019

IJEAT

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The objective of this study was to isolate an acidophilic iron-oxidizing bacterium, Leptospirillum ferriphilum, and explore the impacts of initial Fe(II) concentration on the bioleaching kinetics of zinc retrieval from sphalerite concentrate. L. ferriphilum strain was successfully isolated from Chitradurga mine, Karnataka, India, and molecular techniques for DNA sequencing were applied. The obtained nucleotide sequence was deposited to GenBank and accession number KF743135 was granted. The effect of Fe(II) on the iron-based bioleaching kinetics of zinc leaching using the L. ferriphilum isolate was ascertained under the following experimental conditions: inoculum size, 10% (v/v); bioleaching period, 20 days; system temperature, 301±2 K; initial pH, 3; pulp density 5% (w/v); and Fe(II) concentration in the medium, 1–9 g/L. The results demonstrated that efficiency of bioleaching was highly influenced by concentration of Fe(II) and maximized yield of 87.85% zinc was obtained at 7 g/L. The kinetic study specify that the rate constant estimations of zinc biosolubilization were moderately high at 7 g/L Fe(II), and the kinetic analysis using shrinking core model showed that the leaching rate is constrained by ash layer diffusion step

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Bioleaching kinetics of copper from copper smelters dust

Cited by 45 publications

References 19 publications

Synthesis and characterization of tenorite (CuO) nanoparticles from smelting furnace dust(SFD)

Synthesis and characterization of tenorite (CuO) nanoparticles from smelting furnace dust(SFD)

Kinetics of Iron Bioleaching using Isolated Leptospirillum Ferriphilum: Effect of Temperature

Effect of FE(II) Concentration on Bioleaching of Zinc from Sphalerite using Leptospirillum Ferriphilum: Kinetic Aspects

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