Adsorption Structure and Mechanism of Styryl Phosphoric Acid at the Rutile–Water Interface

In this study, electrochemistry pretreatment flotation of muscovite was carried out and the flotation behavior and mechanism of muscovite in the system of sodium oleate and Cu2+ion was characterized by solution pH value detection, solution conductivity detection, zeta potential, infrared spectrum and the electronic energy spectrum. The results indicated that under the conditions of muscovite mass of 10.00 g, pulp mass concentration of 13.33%, flotation speed of 1750 r/min, sodium oleate concentration of 9.20 × 10−4 mol/L and Cu2+ concentration of 6 × 10−5 mol/L, electrochemical pretreatment of Cu2+ could strengthen the activation of muscovite. Electrochemical pretreatment of Cu2+ solution can inhibit the hydrolysis of copper ions, increase the content of Cu2+ in the solution, strengthen the adsorption of Cu2+ on the muscovite surface, and enhance the electrostatic adsorption of sodium oleate on the muscovite surface, thereby strengthening the physical and chemical adsorption of sodium oleate on the muscovite surface.

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“…The samples were examined in KBr pellets (3 mg/300 mg KBr). All samples were analyzed with a Lumex FTIR-08 spectrophotometer [18].…”

Section: Ftir Spectroscopy Characterizationmentioning

confidence: 99%

Effect of Cu2+ on the Activation to Muscovite Using Electrochemical Pretreatment

Wang

Xiao

et al. 2020

Minerals

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“…The value of ∆G 0 ads represented the adsorption ability of the collector on the mineral surface. The smaller the value, the stronger the adsorption ability is [36,37]. It is worth noting that in rougher stage, the dosage of the collector was chosen higher under neutral conditions of ilmenite.…”

Section: Zeta Potential Measurementsmentioning

confidence: 99%

Analysis of the Application Potential of Coffee Oil as an Ilmenite Flotation Collector

Wang

Xiao

Ma³

et al. 2019

Minerals

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Coffee grounds are the most significant production waste in the coffee industry and contain about 15% coffee oil. Coffee oil is rich in fatty acids and polyphenols, which have great application potential in the flotation of oxidized minerals. In this study, coffee oil as a green flotation collector for ilmenite was investigated by micro-flotation, zeta potential measurement, and foam stability analysis. The results of zeta potential reveal that both coffee oil and MOH can be adsorbed on the ilmenite surface at pH 6.7, and the chemical adsorption mode is dominant. However, when the pH is 2.8, the adsorption capacity of coffee oil on the ilmenite surface is much larger than that of MOH. The pH value of the pulp has little effect on the foam properties in the coffee oil solution and has a great influence on the foaming performance and foam stability of the MOH solution. When coffee oil is used as a collector, the grade of TiO2 in ilmenite concentrate is increased from 21.68% to 46.83%, and the recovery is 90.22%, indicating that the potential of coffee oil in the application of ilmenite flotation is large.

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“…Gravity and electrostatic separation methods are suitable for upgrading rutile in beach sand deposits (Chen et al, 2013;Premaratne and Rowson, 2003). Conversely, flotation is efficient for concentrating rutile, especially for a primary rutile ore (Xiao et al, 2018c).…”

Section: Introductionmentioning

confidence: 99%

“…Several collectors can be employed for rutile flotation, such as oleate, styryl phosphonic acid (SPA), and hydroxamic acids (Liu and Peng, 1999;Wang et al, 2014Wang et al, , 2016Xiao et al, 2018c). In recent years, some metal ions have been found to be activators for rutile flotation.…”

Section: Introductionmentioning

confidence: 99%

Insights into the interaction between octyl hydroxamic acid and the rutile surface activated by lead ion

Cao¹,

Chen²,

Zou³

et al. 2020

Physicochem. Probl. Miner. Process.

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The flotation of rutile can be enhanced using lead ion as an activator. However, the binding behavior of collector on the activated rutile surface is still not fully understood. In this work, flotation and theoretical calculation approaches were employed to evaluate the activation behavior of lead ion in the flotation of rutile with octyl hydroxamic acid (OHA). Flotation results indicated that the activation flotation with lead ion should be conducted at pH 6.5. The binding features of OHA molecule on the inactivated and Pb-activated rutile surfaces were both investigated by density functional theory (DFT) studies. The OHA molecule may dissociate into OHA − anion on the inactivated rutile surface, generating a new Ti-O bond. Differently, the chelate complex of Pb-OHA anion was generated on the activated rutile surface, producing two Pb-O bonds. The adsorption of OHA onto the activated rutile surface was more stable than that on the inactivated rutile surface, due to the formation of more chemical bonds on the activated rutile surface. The DFT calculation results delineated the role of Pb 2+ in the rutile flotation with OHA.

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Adsorption Structure and Mechanism of Styryl Phosphoric Acid at the Rutile–Water Interface

Cited by 13 publications

References 57 publications

Effect of Cu2+ on the Activation to Muscovite Using Electrochemical Pretreatment

Effect of Cu2+ on the Activation to Muscovite Using Electrochemical Pretreatment

Analysis of the Application Potential of Coffee Oil as an Ilmenite Flotation Collector

Insights into the interaction between octyl hydroxamic acid and the rutile surface activated by lead ion

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