Impact of gypsum supersaturated process water on the interactions between silica and zinc sulphide minerals

Deng, Meijiao; Xu, Zhenghe; Liu, Qingxia

doi:10.1016/j.mineng.2013.09.017

Cited by 13 publications

(7 citation statements)

References 52 publications

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“…Due to the change in wettability of the bitumen layer and steric hindrance, the adsorbed humic acids reduces the slime coating [183]. 4.2.2 Mineral flotationIn mineral flotation, QCM-D technique was used to understand the effect of supersaturation of water with gypsum on the interactions between zinc sulphide and silica minerals [187]. Remarkably silica nanoparticles deposited on both ZnS and SiO2 coated sensor surfaces in both 800 ppm calcium solutions and gypsum supersaturated solutions.Figure 6(a) shows a typical QCM-D temporal profile of silica nanoparticle deposition on zinc sulfide QCM-D sensor surface from 800 ppm calcium solutions.…”

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confidence: 99%

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QCM-D study of nanoparticle interactions

Qian

Liu

et al. 2016

Advances in Colloid and Interface Science

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confidence: 99%

“…Gypsum supersaturation of the solution enhances the homo-aggregation between silica particles, and hetero-aggregation between silica and sphalerite. The hetero-aggregation between silica and sphalerite minerals reduces flotation selectivity in gypsum supersaturated solutions [187].…”

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confidence: 99%

QCM-D study of nanoparticle interactions

Qian

Liu

et al. 2016

Advances in Colloid and Interface Science

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179

105

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“…Recently, Deng et al used quartz crystal microbalance with dissipation (QCM-D) technique to study interactions of gypsum and calcite with silica and sphalerite in gypsum/calcite-supersaturated solutions . Gypsum supersaturated solution was found to promote heteroaggregation between silica and sphalerite, and homoaggregation between silica particles, which could not be studied by zeta potential distribution measurement due to its inherent limitations. ,, The heteroaggregation between silica and sphalerite minerals was shown to be responsible for the reduced flotation recovery and selectivity in both laboratory flotation tests and commercial operations.…”

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confidence: 99%

Understanding Interactions between Clay and Model Coal Surfaces in Electrolyte Solutions by a Quartz Crystal Microbalance with Dissipation Study

et al. 2017

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Clay slime coating is known to have a negative impact on coal flotation. It is therefore of great importance to study interactions between clay and coal under flotation conditions. In this study, the effect of electrolytes on the interactions of montmorillonite (MMT) clays with carbon or asphaltenes on sensor surfaces of quartz crystal microbalance with dissipation (QCM-D) as model coal was investigated. Ion beam sputtering deposition and spin coating methods were used to prepare carbon and asphaltene (a class of natural polyaromatic compounds) surfaces. The prepared surfaces were characterized by Raman spectroscopy. QCM-D was used to determine in situ interactions between MMT clays and model coal surfaces in electrolyte aqueous solutions. The MMT clays were shown to deposit significantly on the model coal surfaces only in the presence of NaCl or CaCl2 as a result of the compression of electrical double layers. Moreover the enhanced deposition by calcium ions is stronger than by sodium ions. The results from this fundamental study provide a better understanding of the critical role of water chemistry in modulating the interactions of clays with coal surfaces and scientific guidance to achieve better performance of fine coal flotation.

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“…QCM-D has been shown to be a powerful research tool for evaluating in situ interactions between nanoparticles and functionalized surfaces . The Sauerbrey relationship has been used in most studies, although it has challenges regarding quantitative analysis. ,, A hydrodynamics model has also been suggested for the analysis of particle adsorption . The hydrodynamics model represents a positive frequency shift .…”

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Particle Adsorption Using a Quartz Crystal Microbalance with Dissipation by Applying a Kelvin–Voigt-Based Viscoelastic Model and the Gauss–Newton Method

Furikado,

Forsman,

Nylander

2023

Anal. Chem.

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The use of a quartz crystal microbalance with dissipation (QCM-D) to study the adsorption of particles larger than 100 nm, such as liposomes, viruses, and nano/micro-plastics, remains challenging owing to the lack of appropriate models for data evaluation. This study presents a method for quantifying the adsorption of negatively charged polystyrene latex (100 nm–1 μm) at the solid–liquid interface. The validity of a viscoelastic model based on Kelvin–Voigt theory was assessed, and the model was used to evaluate particle adsorption data obtained from QCM-D measurements. The Gauss–Newton method was used to fit the data; the values obtained were larger than results from atomic force microscopy, indicating that the viscoelastic model combined with the Gauss–Newton method can quantify the adsorption of large polystyrene particles and the surrounding water around them. We suggested that QCM-D, in combination with an appropriate viscoelastic model, is applicable to estimate adsorption at the solid–liquid interface even for soft particles larger than 1 μm, which are out of the range of applications to the hydrodynamics model. Furthermore, we successfully showed that the recorded dissipation reflects the viscoelastic properties of the layer. The viscoelastic model allowed quantification of the rheological properties of the layer. The ratio of the viscous and elastic contributions was characterized by using loss tangent (tan δ) values that were extracted from the experimental data by applying the viscoelastic model. These values were lower for the adsorption of the negatively charged polystyrene particles on a positive surface than on a negative surface. This suggests that tan δ reflects the strength of the contact between the particle and substrate.

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Impact of gypsum supersaturated process water on the interactions between silica and zinc sulphide minerals

Cited by 13 publications

References 52 publications

QCM-D study of nanoparticle interactions

QCM-D study of nanoparticle interactions

Understanding Interactions between Clay and Model Coal Surfaces in Electrolyte Solutions by a Quartz Crystal Microbalance with Dissipation Study

Particle Adsorption Using a Quartz Crystal Microbalance with Dissipation by Applying a Kelvin–Voigt-Based Viscoelastic Model and the Gauss–Newton Method

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