From Microbubbles to Nanobubbles: Effect on Flotation

Kyzas, George Z.; Mitropoulos, Athanasios C.; Matis, K. A.

doi:10.3390/pr9081287

Cited by 23 publications

(14 citation statements)

References 72 publications

(84 reference statements)

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“…In addition, Calgaroto et al (2015) indicated that the most important mechanisms for NBs aiding the MBs flotation are the contact angle between contaminant particles and MBs was enhanced and the aggregation of particles was induced. It was reported that the combination of MBs and NBs has a high potential in removing pollutants from wastewater (Kyzas et al 2021).…”

Section: Rising Velocitymentioning

confidence: 99%

Microbubble and nanobubble-based gas flotation for oily wastewater treatment: a review

et al. 2022

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Gas flotation for oily wastewater treatment is based on the attachment of gas bubbles to oil droplets to produce lighter aggregates that rise to the wastewater surface. It is a feasible, promising, and effective method for oily wastewater treatment due to its high separation efficiency with no secondary contamination, cost-effectiveness, and simple operation. This review focuses on separating oil from emulsions by gas flotation using microbubbles and nanobubbles which offer the advantages of small bubble size, large specific surface area, and slow rising velocity. The properties of different types of gas bubbles and their generation methods were discussed. Different gas flotation system designs and operational parameters were summarized for dissolved gas flotation, induced gas flotation, and electrolytic flotation. The review illustrated that oil removal efficiency in microbubble and nanobubble-based gas flotation was affected by various factors including initial oil concentration, pH, temperature, flotation time, and oil droplet size.

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Section: Rising Velocitymentioning

confidence: 99%

Microbubble and nanobubble-based gas flotation for oily wastewater treatment: a review

et al. 2022

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“…Heavy metal is one of the contaminants found in wastewater [4]. Anthropogenic sources such as electronics assembly and production, textiles, fertilizer and pesticide use, and mining operations all contribute to this wastewater with heavy metals [5] [6]. These heavy metals can be hazardous to species, including humans, even at low concentrations [7].…”

Section: Introductionmentioning

confidence: 99%

“…However, most of these approaches have drawbacks, such as metal removal that is insufficient [6]. It is critical that we find novel methods for the affordable, energy-efficient cleanup of trace pollutants from water in order to sustain environmental and human well-being [8] [9] .…”

Section: Introductionmentioning

confidence: 99%

Novel laboratory extraction method using magnetically micro bubble stream

Atiyah

Hussein²

2022

ijhs

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Innovative, sensitive and accurate method for liquid-liquid extraction using bubble phenomenon. is presented in this work. A working system was designed, consisting of two basic parts: the pump air to generate the bubbles and the pump device, to pump or withdraw the organic layer from the liquid-liquid system key variables study was performed in the system containg Dithizone (0.001 M) in CHCl₃ solvent and aqueous copper (II) chloride (1000 ppm) solution to find out the extent of their impact on the extraction performance obtained in this way. The effect of copper concentration in the initial sample, shake time, size of bubbles flowrate were studied, fixing the optimal conditions: for a sample of (10 mL) aqueous solution of Cu (II) chloride, the optimum copper (II) concentration in the analyzed sample is (0.0001M) , the size of bubbles 2.6 L\min, the shaking time is (15 min), and the pump flowrate is ( 50sec/mL). In these optimum conditions, the extraction degree was (91.1 %). The results of the innovative bubbles extraction method were compared with previous studies, and found they were more efficient than the classical methods of extraction using funnel separation and multiple extraction.

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“…The ore extracted from the mines of KGHM Polska Miedź S.A. contains, on average, about 1.52% of useful metal [3]. Valuable ore is subjected to processing, the main operation of which is enrichment by flotation [4][5][6][7]. As a result of this operation, a concentrate is obtained with a copper content enabling it to be metallurgically processed in the smelting process.…”

Section: Introductionmentioning

confidence: 99%

“…of which is enrichment by flotation [4][5][6][7]. As a result of this operation, a concentrate is obtained with a copper content enabling it to be metallurgically processed in the smelting process.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Possibility of Using New Types of Protective Coatings and Abrasion-Resistant Linings under the Operating Conditions of the Spiral Classifier at KGHM Polska Miedź S.A. Ore Concentration Plant

et al. 2021

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A study was carried out to select the appropriate coatings for corrosion protection of the spiral classifier working at KGHM Polska Miedź S.A. Ore Concentration Plant. The abrasion resistance of selected protective coatings and wear-resistant linings was investigated using a DT-523 rotary abrasion tester with Taber CS-10 rubber abrasive discs. The average weight loss of the coatings after a cycle of 2000 revolutions was determined. Tests of protective coatings using the electrochemical impedance spectroscopy (EIS) technique were carried out to determine the suitability of coatings in the highly saline environment of the aqueous suspension of ground copper ore. During the measurements, changes in resistance, polarising current and capacitance were determined as a function of time for the tested coatings. The linings selected on the basis of laboratory tests were also tested under industrial conditions. Their degrees of wear were characterised. The results obtained indicated the highest abrasion resistance of materials from the polyolefin group (polyethylenes), where the average weight loss did not exceed 5 g/dm2. In the case of protective coatings, the highest durability was demonstrated by coatings with additives of ceramic aggregates, phenol-epoxy, and an elastomeric coating based on polyurea, whose average weight loss during the test cycle did not exceed 19 g/dm2. EIS measurements showed that the tested coatings were resistant to the aggressive environment of the feedstock. Tests under cathodic polarisation conditions of the samples at a potential below the protection potential showed that they were resistant to a highly saline environment and were also resistant to its alkalinisation resulting from the application of cathodic protection, which will be used to protect the classifier together with protective coatings. Tests carried out under industrial conditions using wear-resistant linings made of plastics have made it possible to analyse the mechanism and degree of wear of the various materials during the operation of the classifier. Measurements of lining wear were made in relation to baseline volumes. Polyurethane, a polymer lining based on MDI and PTMG, and those made of ultra-high-molecular-weight polyethylene with anti-stick additives showed the lowest wear rates.

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From Microbubbles to Nanobubbles: Effect on Flotation

Cited by 23 publications

References 72 publications

Microbubble and nanobubble-based gas flotation for oily wastewater treatment: a review

Microbubble and nanobubble-based gas flotation for oily wastewater treatment: a review

Novel laboratory extraction method using magnetically micro bubble stream

Analysis of the Possibility of Using New Types of Protective Coatings and Abrasion-Resistant Linings under the Operating Conditions of the Spiral Classifier at KGHM Polska Miedź S.A. Ore Concentration Plant

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