Activation mechanisms of quartz flotation with calcium ions and cationic/anionic mixed collectors under alkalescent conditions

Wang, Li; Wang, Guodong; Ge, Peng; Sun, Wei; Tang, Honghu; Hu, Wenjihao

doi:10.1016/j.colsurfa.2021.127771

Cited by 22 publications

(6 citation statements)

References 39 publications

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“…In the recovery curve of CaCl 2 + NaOL, the quartz recovery increased abruptly at pH > 10.5; in the recovery curve of CaCl 2 + NaOL + DDA, the recovery of quartz typically showed an upward trend across the pH range of 3–12, indicating that Ca 2+ has a crucial effect on quartz flotation. The details of this section can be found in our previous articles . The above AFM force results clearly explain the interaction mechanism present in this result.…”

Section: Resultssupporting

confidence: 81%

“…The details of this section can be found in our previous articles. 14 The above AFM force results clearly explain the interaction mechanism present in this result.…”

Section: Qcm-d Study On Adsorptionsupporting

confidence: 78%

“…Under conditions of pH 10.0, employing a mixture of 0.5 mmol/L CaCl 2 and 2.8 mmol/L combined NaOL/DDA collectors at a molar ratio of 8/1, 90.98% of quartz and 13.08% of feldspar were observed to float . Wang et al investigated the impact of Ca 2+ on quartz flotation in a dodecylamine (DDA) + sodium oleate (NaOL) system by flotation experiments, and compared with the single surfactant, the flotation of quartz with the mixed solution of 5 × 10 –4 mol/L Ca 2+ , 3.0 × 10 –5 mol/L DDA, and 2.5 × 10 –4 mol/L NaOL resulted in a wider pH range of application and higher recovery as compared to the monosurfactant, up to >95% . Kou et al used the quartz crystal microbalance with dissipation (QCM-D) approach to assess in situ NaOL adsorption on quartz surfaces activated by Ca 2+ at various concentrations and pH levels .…”

Section: Introductionmentioning

confidence: 99%

“…13 Wang et al investigated the impact of Ca 2+ on quartz flotation in a dodecylamine (DDA) + sodium oleate (NaOL) system by flotation experiments, and compared with the single surfactant, 9 the flotation of quartz with the mixed solution of 5 × 10 −4 mol/L Ca 2+ , 3.0 × 10 −5 mol/L DDA, and 2.5 × 10 −4 mol/L NaOL resulted in a wider pH range of application and higher recovery as compared to the monosurfactant, up to >95%. 14 Kou et al used the quartz crystal microbalance with dissipation (QCM-D) approach to assess in situ NaOL adsorption on quartz surfaces activated by Ca 2+ at various concentrations and pH levels. 15 The results show that alkaline conditions have a positive effect on quartz activation and anion flotation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca²⁺ Ions by AFM Force Measurement

Meng,

Xie,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

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Quartz is a key raw material in high-tech fields (such as photovoltaics and semiconductor microelectronics), and the most efficient extraction method of quartz is mineral flotation. Quartz activation plays a crucial role in mineral flotation. However, the mechanism underlying the process remains unclear, and the role of additional metal ions is controversial. In this study, the interaction forces between the quartz surface, the dodecylamine (DDA) cation/sodium oleate (NaOL) anion mixed collectors, and Ca 2+ were analyzed using atomic force microscopy in order to systematically explore the activation process of quartz flotation. The results confirmed that the activation process was initialized from NaOL, which was adsorbed on the surface of a calcium-covered quartz surface. The existence of DDA inhibited the binding of Ca 2+ to NaOL so that more Ca 2+ was adsorbed on the quartz surface to provide the adsorption site for NaOL. Moreover, the best adsorption condition of Ca 2+ + NaOL + DDA mixed solution was analyzed by quartz crystal microbalance with dissipation, and it demonstrated that the most stable chemisorption environment on the quartz surface was at pH 11.0. In these circumstances, Ca 2+ could first adsorb in a point-like manner on the quartz surface, which was then adsorbed with a mixture of NaOL and DDA. This result showed that, at a specific pH, Ca 2+ could encourage the coadsorption of cationic/anionic mixed collectors on quartz. This work provides an important new understanding of the intermolecular interactions that take place during complex mineral flotation processes between chemical additives and mineral surfaces. The methodology used in this study can be easily adapted to different interfacial processes, including water treatment, membrane technology, bioengineering, and oil production.

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Section: Resultssupporting

confidence: 81%

“…The details of this section can be found in our previous articles. 14 The above AFM force results clearly explain the interaction mechanism present in this result.…”

Section: Qcm-d Study On Adsorptionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca²⁺ Ions by AFM Force Measurement

Meng,

Xie,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

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show abstract

“…The changes on the quartz surface also indicated that the CPAO adsorbed on the quartz surface particles in some form. Based on the analysis results of contact angle detection, it could be inferred that one end of the CPAO adsorbed on the quartz surface particles in some form, and the hydrophobic end was exposed to the outside, thus improving the hydrophobic surface of the quartz surface [32][33][34]. It can also be seen from Figure 8c,d) that the absolute altitude of the magnesite surface changes little before and after the CPAO treatment, indicating that the CPAO hardly adsorbs on the magnesite surface.…”

Section: Afm Analysismentioning

confidence: 99%

Study on Selective Adsorption Behavior and Mechanism of Quartz and Magnesite with a New Biodegradable Collector

Liu,

Zhao,

Zhang

et al. 2023

Separations

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Research on the efficient flotation desilication of low-grade magnesite is of great significance for the sustainable development of magnesium resources. Traditional collectors usually have some disadvantages, such as poor selectivity, severe environmental pollution, and weak water solubility. To strengthen the desilication flotation process of magnesite ore, the biodegradable surfactant, cocamidopropyl amine oxide (CPAO), was first utilized as the collector for the separation of the magnesite and quartz. The selective adsorption behavior and mechanism of the quartz and magnesite with the CPAO as the collector were studied through the micro-flotation experiments of the single mineral and the artificially mixed mineral, contact angle and atomic force microscopy (AFM) measurements, fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. The flotation results indicated that the CPAO showed good selectivity and could effectively separate magnesite and quartz. When the concentration of the CPAO was 10.0 mg/L in the natural pulp pH (about 7.2), the concentrates with 97.67% MgO recovery and 45.62% MgO grade were obtained. The contact angle and AFM measurements indicated that the CPAO could selectively adsorb on the quartz surface rather than the magnesite surface to improve the interface difference between them, especially its surface hydrophobicity. The results of the FTIR and XPS analyses indicated that the CPAO is selectively adsorbed on the surface of the quartz, mainly through electrostatic interaction and hydrogen bonding. In conclusion, the CPAO had good selectivity and great potential as an effective collector in the reverse flotation desilication progress of magnesite.

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Effect of hydration and hydroxylation on the adsorption of metal ions on quartz surfaces: DFT study

Luo

Chen

2022

Applied Surface Science

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Activation mechanisms of quartz flotation with calcium ions and cationic/anionic mixed collectors under alkalescent conditions

Cited by 22 publications

References 39 publications

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca²⁺ Ions by AFM Force Measurement

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca²⁺ Ions by AFM Force Measurement

Study on Selective Adsorption Behavior and Mechanism of Quartz and Magnesite with a New Biodegradable Collector

Effect of hydration and hydroxylation on the adsorption of metal ions on quartz surfaces: DFT study

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Activation mechanisms of quartz flotation with calcium ions and cationic/anionic mixed collectors under alkalescent conditions

Cited by 22 publications

References 39 publications

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca2+ Ions by AFM Force Measurement

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca2+ Ions by AFM Force Measurement

Study on Selective Adsorption Behavior and Mechanism of Quartz and Magnesite with a New Biodegradable Collector

Effect of hydration and hydroxylation on the adsorption of metal ions on quartz surfaces: DFT study

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Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca²⁺ Ions by AFM Force Measurement

Probing the Interaction Mechanism of Sodium Oleate and Dodecyl Amine with Quartz Surfaces in the Presence of Ca²⁺ Ions by AFM Force Measurement