Energy barrier of aggregates coal particle–bubble through the extended DLVO theory

Piñeres, Jorge; Barraza, Juan

doi:10.1016/j.minpro.2011.04.007

Cited by 61 publications

(16 citation statements)

References 19 publications

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“…This is in addition to previous findings which demonstrated a positive effect of ionic strength in depressing the energetic barrier between hydrophobic coal particles and gas bubbles, important criterion in enhanced flotation of coals (Nguyen et al, 2007;Pineres and Barraza, 2011).…”

Section: Energy Barrier Analysissupporting

confidence: 81%

Flotation of methylated roughened glass particles and analysis of particle–bubble energy barrier

Güven

Çelik

Drelich

2015

Minerals Engineering

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Section: Energy Barrier Analysissupporting

confidence: 81%

Flotation of methylated roughened glass particles and analysis of particle–bubble energy barrier

Güven

Çelik

Drelich

2015

Minerals Engineering

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“…Not surprisingly, biofilms have formed on a variety of surfaces and are not only restricted to attachment at a solid−liquid interface but have been observed at solid−air and liquid−liquid interfaces, 1,5,8 with some having beneficial results as well as detrimental; for example, in industry biofilms are used successfully to separate coal particles from mineral matter. 9,10 On the other hand, biofilms have been known to cause biofouling reducing mass and heat transfer and effectively increasing corrosion; 6,11 also from a medical point of view, biofilm colonized implanted medical devices often lead to implant failure. 8 Furthermore, the food industry has had a major interest in biofilms as a result of their resistance to cleaning and disinfection because spoilage and pathogenic bacteria pose a risk to public health and product quality.…”

Section: ■ Introductionmentioning

confidence: 99%

Surface Roughness Mediated Adhesion Forces between Borosilicate Glass and Gram-Positive Bacteria

Preedy¹,

Perni

Nipič³

et al. 2014

Langmuir

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It is well-known that a number of surface characteristics affect the extent of adhesion between two adjacent materials. One of such parameters is the surface roughness as surface asperities at the nanoscale level govern the overall adhesive forces. For example, the extent of bacterial adhesion is determined by the surface topography; also, once a bacteria colonizes a surface, proliferation of that species will take place and a biofilm may form, increasing the resistance of bacterial cells to removal. In this study, borosilicate glass was employed with varying surface roughness and coated with bovine serum albumin (BSA) in order to replicate the protein layer that covers orthopedic devices on implantation. As roughness is a scale-dependent process, relevant scan areas were analyzed using atomic force microscope (AFM) to determine Ra; furthermore, appropriate bacterial species were attached to the tip to measure the adhesion forces between cells and substrates. The bacterial species chosen (Staphylococci and Streptococci) are common pathogens associated with a number of implant related infections that are detrimental to the biomedical devices and patients. Correlation between adhesion forces and surface roughness (Ra) was generally better when the surface roughness was measured through scanned areas with size (2 × 2 μm) comparable to bacteria cells. Furthermore, the BSA coating altered the surface roughness without correlation with the initial values of such parameter; therefore, better correlations were found between adhesion forces and BSA-coated surfaces when actual surface roughness was used instead of the initial (nominal) values. It was also found that BSA induced a more hydrophilic and electron donor characteristic to the surfaces; in agreement with increasing adhesion forces of hydrophilic bacteria (as determined through microbial adhesion to solvents test) on BSA-coated substrates.

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“…The Hamaker constant A is obtained through the Lifshitz approach [31]. For malachite particle_1 and oil droplet_2 interacting in aqueous solution_3, A132 is given as In the oil-assisted flotation system, where oil droplets interact with hydrophobic particles, the interactions can be explained using EDLVO theory since hydrophobic interaction plays a significant role [28]. In an attempt to investigate the energetics of the studied malachite-collector-kerosene system, the EDLVO theory calculation was performed.…”

Section: Resultsmentioning

confidence: 99%

Floc-Flotation of Malachite Fines with an Octyl Hydroxamate and Kerosene Mixture

Rao

Lou

et al. 2019

Minerals

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Malachite fines are easily produced in the grinding process, leading to low malachite flotation recovery. Floc-flotation of malachite fines with an octyl hydroxamate and kerosene mixture was studied to improve the flotation recovery, using microflotation, microscopy image observations, contact angle measurements, and Extended Derjguin–Landau–Verwey–Overbeek (EDLVO) analysis. The results showed that the addition of octyl hydroxamate as an emulsifier of kerosene enhanced the aggregation of malachite fines and improved malachite flotation recovery. In addition, when kerosene droplets were smaller and of uniform size distribution, the spreading of kerosene droplets on the malachite surface improved. The enhanced spreading of kerosene droplets led to higher coverage of kerosene on the malachite surface, resulting in improved hydrophobic aggregation and flotation recovery.

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Energy barrier of aggregates coal particle–bubble through the extended DLVO theory

Cited by 61 publications

References 19 publications

Flotation of methylated roughened glass particles and analysis of particle–bubble energy barrier

Flotation of methylated roughened glass particles and analysis of particle–bubble energy barrier

Surface Roughness Mediated Adhesion Forces between Borosilicate Glass and Gram-Positive Bacteria

Floc-Flotation of Malachite Fines with an Octyl Hydroxamate and Kerosene Mixture

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