Rutile flotation with Pb2+ ions as activator: Adsorption of Pb2+ at rutile/water interface

Li, Hongqiang; Mu, Shunxing; Weng, Xiaoqing; Zhao, Yunliang; Song, Shaoxian

doi:10.1016/j.colsurfa.2016.06.046

Cited by 81 publications

(25 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It indicated that Pb 2+ ions could not be used as the activator for rutile flotation in the pH range of 1-2.5, but could be used as the activator in the pH range of 2.5-7.0. Li et al [8] used Pb 2+ ions as the activator for rutile flotation with the collector of salicyl hydroxamic acid (SHA) in the pH range of 4.5-6.5, which was similar to our results. shows Δflotation recovery before and after the addition of activation ions as a function of pH.…”

Section: Micro-flotation Testssupporting

confidence: 90%

“…The species distribution diagrams for Bi 3+ , Pb 2+ , Ti 4+ ions and SPA are shown in Figure 9 and help explain the results obtained from zeta potential experiments [19]. On one hand, Pb 2+ ions adsorbed on the rutile surface through electrostatic forces [8], resulting in the increase of zeta potential; on the other hand, because of the presence of salt solution, the thickness of the electric double layer of the rutile surface was compressed [26][27][28], resulting in the decrease of the zeta potential. In the pH range of 1-2.5, which was the optimal pH range for flotation, the rutile surface charge was positive.…”

Section: Zeta Potentialssupporting

confidence: 54%

“…Many studies have reported that Pb(NO 3 ) 2 was the effective activator to the flotation of the minerals containing titanium. Li et al [8] found that Pb(NO 3 ) 2 was an activator to effectively improve rutile floatability using salicyl hydroxamic acid as a collector, and the optimal pH range for the activating processing was 5.5-6.8. Fan and Rowson [9] investigated the effects of Pb(NO 3 ) 2 on the flotation separation of ilmenite using sodium oleate as a collector.…”

Section: Introductionmentioning

confidence: 99%

“…The condition of mechanism (1) is the formation of hydroxy compounds of Me 2 ; and (2) is that the solubility product of Me 2 S or Me 2 O needs to be less than that of Me 1 S or Me 1 O. However, in the pH range of 1-3, the main specie of Pb(NO 3 ) 2 in the solution is free Pb 2+ ions and is adsorbed on the rutile surface through electrostatic forces [8], and the solubility product of PbO is much greater than TiO 2 . So, Pb 2+ ions have been unable to act as an activator for rutile flotation in this pH range.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment

et al. 2017

View full text Add to dashboard Cite

Lead hydroxyl compounds are known as rutile flotation of the traditional activated component, but the optimum pH range for flotation is 2-3 using styryl phosphoric acid (SPA) as collector, without lead hydroxyl compounds in slurry solution. In this study, Bi 3+ ions as a novel activator was investigated. The results revealed that the presence of Bi 3+ ions increased the surface potential, due to the specific adsorption of hydroxyl compounds, which greatly increases the adsorption capacity of SPA on the rutile surface. Bi 3+ ions increased the activation sites through the form of hydroxyl species adsorbing on the rutile surface and occupying the steric position of the original Ca 2+ ions. The proton substitution reaction occurred between the hydroxyl species of Bi 3+ ions (Bi(OH) n +(3−n)) and the hydroxylated rutile surface, producing the compounds of Ti-O-Bi 2+. The micro-flotation tests results suggested that Bi 3+ ions could improve the flotation recovery of rutile from 61% to 90%, and from 61% to 64% for Pb 2+ ions.

show abstract

Section: Micro-flotation Testssupporting

confidence: 90%

Section: Zeta Potentialssupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment

et al. 2017

View full text Add to dashboard Cite

show abstract

“…For example, lead ions can be adsorbed onto an ilmenite surface and complexed with benzohydroxamic acid in solution, which significantly improves the recovery of ilmenite [30]. Previous studies have demonstrated the effectiveness of lead ion activation [31][32][33][34][35]. However, when octyl hydroxamic acid is used as the collector, the effect of lead ions on perovskite flotation has not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector

2018

View full text Add to dashboard Cite

The activation mechanism of lead ions (Pb 2+ ) in perovskite flotation with an octyl hydroxamic acid collector was systematically investigated using microflotation experiments, zeta-potential measurements, adsorption tests, Fourier transform infrared (FT-IR) analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The results of microflotation experiments and adsorption tests indicate that the presence of Pb 2+ can promote the adsorption of octyl hydroxamic acid (OHA) on the perovskite surface and enhance the flotability of perovskite under weakly acidic conditions. The maximum recovery of 79.62% was obtained at pH 6.5 in the presence of Pb 2+ , and the maximum recovery of 57.93% was obtained at pH 5.7 without Pb 2+ . At pHs below 7, lead species are mainly present as Pb 2+ and PbOH + in the solution; besides this, the relative content of titanium increases on the perovskite surface. The adsorption of Pb 2+ and PbOH + on the perovskite surface makes the zeta-potential of perovskite shift positively, and increases the number of activated sites on the perovskite surface. FT-IR and XPS analyses confirm that OHA chemisorbs on the surface of Pb 2+ -activated perovskite and forms hydrophobic Pb-OHA complexes, which improve the flotability of perovskite.

show abstract

Adsorption of Cations on Minerals

Rao

García

2020

Adsorption at Natural Minerals/Water Interfaces

View full text Add to dashboard Cite

Rutile flotation with Pb2+ ions as activator: Adsorption of Pb2+ at rutile/water interface

Cited by 81 publications

References 16 publications

The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment

The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment

Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector

Adsorption of Cations on Minerals

Contact Info

Product

Resources

About