Study effects of conventional flotation reagents on bioleaching of zinc sulfide

Jafari, M; Chelgani, S. Chehreh; Shafaie, S. Z.; Abdollahi, Hadi; Hadavandi, Esmaeil

doi:10.1016/j.jiec.2019.05.033

Cited by 11 publications

(9 citation statements)

References 44 publications

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“…The developed mathematical models for chemical reaction and ash layer diffusion control step are expressed in Eqs. (8) and (9) [33]:…”

Section: Kinetic Approaches On Bioleaching Studiesmentioning

confidence: 99%

“…Extracting Zn using traditional methods is difficult and expensive because sphalerite is generally associated with other minerals, such as pyrite and galena [5,6]. Bacterial-assisted leaching (bioleaching) has been proven to be ecofriendly and the most cost-effective option to the traditional procedures without making use of sulfur dioxide that follows as by-product in traditional methods and causes environmental issues [7][8][9]. Bioleaching can be applied for extracting Zn from sphalerite.…”

Section: Introductionmentioning

confidence: 99%

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Bioleaching of Zn from sphalerite using Leptospirillum ferriphilum isolate: effect of temperature and kinetic aspects

Sundramurthy

Ramesh²,

Srinivasan

et al. 2020

Appl Biol Chem

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Biological methods for leaching of nonferrous and noble metals from its sulfide ores are widely applied at industrial enterprises of different countries. This process is based on the use of the oxidative activity of acidophilic microorganisms. Since all bio systems are quite sensitive to the temperature, bacterial leaching process also significantly effects. In the present study, the impact of temperature on bacterial leaching of Zn from its sulphide ore, sphalerite, was investigated using ore adapted iron oxidizing bacteria. The bacteria were isolated from mine drainage samples and subjected to gene sequencing. The acquired nucleotide sequence revealed that the isolate was Leptospirillum ferriphilum. The nucleotide sequence of L. ferriphilum isolate was submitted to National Center for Biotechnology Information (NCBI) and accession number KF743135 was assigned. Using the isolate, the Zn leaching data were collected in the 298-318 K temperature range. The results showed that leaching of Zn increases with temperature until optimum temperature of 313 K and achieves highest leaching efficiency of 96.96% within 20 days. Since bioleaching of minerals have become increasingly applied in different mining industries, there is immense important to analyze mechanistically-based kinetics for the design, optimization, operation, and control of biochemical processes. The kinetic study showed that the rate of Zn leaching was maximized at the optimum temperature. Further, the leaching data were analyzed using shrinking core model which revealed that the rate of leaching was inhibited by diffusion through product layer. Reaction kinetics is also to be contrasted with thermodynamics. Using Arrhenius law of thermodynamics, it was found that activation energy for Zn bioleaching reaction was 39.557 kJ mol −1. Such investigations will be necessitated for designing and implanting the ideal bioleaching system for metal bio-mining industries.

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“…The developed mathematical models for chemical reaction and ash layer diffusion control step are expressed in Eqs. (8) and (9) [33]:…”

Section: Kinetic Approaches On Bioleaching Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bioleaching of Zn from sphalerite using Leptospirillum ferriphilum isolate: effect of temperature and kinetic aspects

Sundramurthy

Ramesh²,

Srinivasan

et al. 2020

Appl Biol Chem

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“…For ranking operating variables by RF, the permutation accuracy importance measurement (PAIM), which is an advanced non-linear tool for VIM, is used. The PAIM for VIM compares the differences between the prediction accuracy of a tree before and after random permutation of the target variable (Matin et al 2016; Matin and Chelgani 2016; Chelgani et al 2016a, 2016b; Shahbazi et al 2017; Chelgani and Matin 2018; Matin et al 2018; Nazari et al 2019; Tohry et al 2019; Jafari et al 2019a, 2019b). The final ranking of variables is based on the computed average of differences over all trees.…”

Section: Methodsmentioning

confidence: 99%

“…Additional testing proved a reverse flotation addition would produce an even better quality final product and enable eliminating the roasting step. Chelgani et al 2016aChelgani et al , 2016bShahbazi et al 2017;Chelgani and Matin 2018;Matin et al 2018;Nazari et al 2019;Tohry et al 2019;Jafari et al 2019aJafari et al , 2019b 2018; Matin et al 2018;Nazari et al 2019;Tohry et al 2019;Jafari et al 2019aJafari et al , 2019b.…”

Section: Random Forestmentioning

confidence: 99%

“…RF can eliminate the imprecision and uncertainty of complex linear and non-linear relationships for VIM. Although RF for VIM has been used in several mining area investigations (Matin et al 2016; Matin and Chelgani 2016; Chelgani et al 2016a, 2016b; Shahbazi et al 2017; Chelgani and Matin 2018; Matin et al 2018; Nazari et al 2019; Tohry et al 2019; Jafari et al 2019a, 2019b), it is not yet widely used in mineral processing. Therefore, this worked used RF for ranking variables of a SLon® unit (rougher and cleaner stage) based on their effec on the separation efficiency (SE) for reprocessing IOTs in an industrial plant.…”

Section: Introductionmentioning

confidence: 99%

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Variable importance assessments of an innovative industrial-scale magnetic separator for processing of iron ore tailings

Tohry

Jafari

Farahani

et al. 2020

Mineral Processing and Extractive Metallurgy

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Reprocessing of iron ore tailings (IOTs) and extracting recoverable valuable iron oxides will become increasingly financially attractive for mining companies and also may reduce environmental problems. Using databases built based on long term monitoring of units installed on plants to control the operational conditions to generate artificial intelligence models can decrease the cost of reprocessing operations Although some investigations have been focused on the reprocessing of IOTs, several challenges still remain which need to be addressed, especially for fine particles. SLon®, has developed a pulsating high gradient magnetic separator for the processing of fine iron oxides. However, there has been no systematic optimisation and variable assessments for SLon® operating variables to examine their effects on metallurgical responses (separation efficiency) on the industrial scale. This study addressed these drawbacks by linear (Pearson correlation) and non-linear (random forest) variable importance measurements (VIM) through an industrial SLon® installation.

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Ni(II) complexes with 1,3,2,4‐dithiadiphosphetane 2,4‐disulfide‐based ligands: Structural insights, theoretical studies, and anticancer activities

Bulat

Sağlam

Zeyrek

et al. 2022

Applied Organom Chemis

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The first synthesis of 2,4‐bis(3,4‐dimethoxyphenyl)‐1,3‐dithia‐2,4‐diphosphetane 2,4‐disulfide (SAV‐A1 reagent) was achieved. Seven oxo‐alkyl esters (HLn) were synthesized thereof. Ni(II) complexes ([Ni(Ln)2]) of these ligands were prepared in ethanol. The structures were identified by spectral studies. Ni(II) complexes were unambiguously determined by X‐ray crystallography. In addition, the ligands and their Ni(II) complexes were tested on two different human cancer cell lines, including liver and colon. Moreover, density functional theory (DFT) calculations of the Ni(II) complexes were performed, and the molecular docking studies of these compounds with liver cancer protein, PDB ID: 3WZE and colon cancer antigen proteins, ID 2HQ6 were presented to investigate and predict potential interactions.

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Study effects of conventional flotation reagents on bioleaching of zinc sulfide

Cited by 11 publications

References 44 publications

Bioleaching of Zn from sphalerite using Leptospirillum ferriphilum isolate: effect of temperature and kinetic aspects

Bioleaching of Zn from sphalerite using Leptospirillum ferriphilum isolate: effect of temperature and kinetic aspects

Variable importance assessments of an innovative industrial-scale magnetic separator for processing of iron ore tailings

Ni(II) complexes with 1,3,2,4‐dithiadiphosphetane 2,4‐disulfide‐based ligands: Structural insights, theoretical studies, and anticancer activities

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