A Review on Bioflotation of Coal and Minerals: Classification, Mechanisms, Challenges, and Future Perspectives

Asgari, Kaveh; Huang, Qingqing; Khoshdast, Hamid; Hassanzadeh, Ahmad

doi:10.1080/08827508.2022.2121919

Cited by 19 publications

(6 citation statements)

References 193 publications

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“…7. Significant interaction effects among operating variables on copper recovery the decrease in the activity of oxidryl functional groups in the rhamnolipid structure, the rate of rhamnolipid micelle formation increases and its effectiveness (both physical and chemical) reduces (Boveiri et al, 2019;Asgari et al, 2022). The interesting point in these studies is that despite the structural similarities, no interaction was observed between the flotation reagents and rhamnolipid.…”

Section: Effect Of Operating Variables On Copper Recoverymentioning

confidence: 89%

“…2019;Moosakazemi et al, 2022). Each approach, that is, the direct use of microorganisms or the use of bioproducts, has its advantages and disadvantages; However, bioproducts namely biosurfactants are superior to direct flotation methods due to ease of production, much higher physical and chemical stability, better biocompatibility, and structural characteristics very similar to conventional chemical surfactants (Asgari et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Biniaz,

Khoshdast,

Garmsiri

et al. 2024

Physicochem. Probl. Miner. Process.

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The present research work studies the effect of rhamnolipid biosurfactant (RL) produced from Pseudomonas aeruginosa bacteria on metallurgical response of a copper ore sample flotation through an extensive full factorial experimental design. Key influential factors including feed particle size, pulp solid content, pH, and dosages of collector, frother and RL biosurfactant were considered. The surface activity of RL biosurfactant was also studied based on D-optimal experimental design. Surface activity results revealed that increasing pH and electrolyte concentrations negatively impacted the RL surface activity, while the effect of electrolyte source was dependent on their ionic strength. Metallurgical investigations showed that operating parameters significantly influence the copper grade and recovery with considerable interaction among various parameters. RL biosurfactant was found to negatively decrease the copper grade and positively enhanced the recovery. Effect of RL was attributed to two potential mechanisms, i.e., being ineffective on copper minerals and/or interaction with gangue minerals, as well as increasing the rate of entrainment due to high foamability, both of which increase non-selective recovery of gangue minerals. Interestingly, regardless of the structural similarities, there wasn’t observed any interaction between the flotation reagents and rhamnolipid. Fourier-transform infrared (FTIR) spectroscopic analysis of copper minerals, both pure and RL-exposed, showed that there is actually no molecular interaction between RL molecules and particle surface.

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Section: Effect Of Operating Variables On Copper Recoverymentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Biniaz,

Khoshdast,

Garmsiri

et al. 2024

Physicochem. Probl. Miner. Process.

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“…A gradual increase on research outputs investigating the application of A. ferrooxidans in biomining of PGMs-bearing base metal sulphides is graphically presented in Figure 3. The increase on the research output around the A. ferrooxidans application in PGMs-bearing base metal sulphides could be attributed to the following: a) The depletion of high-grade ores [25][26][27], b) The refractoriness of gold locked in sulphides [28], and c) The increase of e-waste/ tailings productions that impose toxicity to the environment [29][30][31].…”

Section: The Drivers For the Research Interest On The Application Of ...mentioning

confidence: 99%

“…A. ferrooxidans was first investigated in bio-flotation research as a less dangerous substitute for cyanide as a pyrite depressant in the desulphurization of coal [75][76][77]. The bacterium's attachment to the pyrite surface caused substantial chemical surface modifications that made the material hydrophilic.…”

Section: The Application Of a Ferrooxidans In Bio-flotationmentioning

confidence: 99%

Acidithiobacillus Ferrooxidans Applied for the Beneficiation of Platinum Group Metals-Bearing Base Metal Sulphides

Zulu,

Thethwayo,

Madiba

2023

Preprint

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Platinum group metals (PGMs) high-grade ore tonnage from Merensky reef keeps on depreciating forcing the metallurgical industry to explore beneficiating PGMs from upper group 2 (UG2) ore which has up to 60% content of chromite and from secondary sources. The PGMs are naturally associated with base metal sulphides and the efficacy of the PGMs extraction processes is dependent on the processing of PGMs-bearing base metal sulphides. These processes include concentrating PGMs-bearing base metal sulphides through flotation, oxidation, etc. prior the metal extraction processes. The evolving mineralogy of PGMs ores has necessitated the use of multiple reagents to enhance the efficiency of the concentration process. This has led to an increased amount of inor-ganic chemicals disposal to the environment and the processing of PGMs to be less economic. Bio-technology has been investigated as a potential low cost, ecologically safe substitute for many current minerals processing methods. The metabolites produced by microorganisms have been used for many years with great success in the leaching and flotation of metals from medium and low-grade sulphide minerals. The possible application of microorganism mainly Acidithiobacillus ferrooxidans (A. ferrooxidans) in the metallurgical processing of PGMs-bearing base metal sulphides is systematically reviewed in this paper. The main emphasis is on the use of A. ferrooxidans in bio-oxidation and bioleaching, as well as their potential to substitute inorganic reagents in the flo-tation of PGMs-bearing base metal sulphides from primary and secondary sources

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“…Most of the recent literature on the application of biosurfactants in biobeneficiation addresses the characterisation of biological surfactants, adsorption mechanisms, and physicochemical characteristics of bioflotation, aspects of their industrial bacteria-mineral interactions [3,[7][8][9], while the chemical and physical aspects of mineral surface alteration using microbial cells and their metabolites such as wettability and surface charge are less detailed. In this context, the objective of this present article was to provide a current overview of the interaction of microorganisms and their metabolites with mineral surfaces, emphasising the physicochemistry of these processes.…”

Section: Introductionmentioning

confidence: 99%

The Role of Biomodification in Mineral Processing

Pawlowska,

Sadowski

2023

Minerals

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Increasing environmental concern forces the reduction in the share of synthetic surfactants in the production of various industries, including mineral processing, by replacing them with more environmentally friendly compounds of biological origin. Several studies on the use of biosurfactants in mineral processing are currently available in the literature, but they contain limited information related to the physicochemistry of these processes. Therefore, this review aims to summarise publications from the last decade related to the role of microorganisms and their metabolic products in mineral surface modification applied in mineral processing. Theoretical principles of bacteria–mineral interactions are presented. Salt-type, sulphide, and oxide minerals were discussed with greater attention to the physicochemistry of biosurfactant–mineral interactions, such as the wettability and surface charge. The advantages and disadvantages of using bacterial cells and surface-active microbial compounds were proposed. The trends and challenges of biomodification in flotation and flocculation were discussed.

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A Review on Bioflotation of Coal and Minerals: Classification, Mechanisms, Challenges, and Future Perspectives

Cited by 19 publications

References 193 publications

Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Metallurgical evaluation of copper ore flotation performance in the presence of Rhamnolipid biosurfactant produced from Pseudomonas aeruginosa. Part 1: Copper-bearing minerals

Acidithiobacillus Ferrooxidans Applied for the Beneficiation of Platinum Group Metals-Bearing Base Metal Sulphides

The Role of Biomodification in Mineral Processing

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