A study of galena (PbS) surfaces under controlled potential in pH 4.6 solution by synchrotron radiation excited photoelectron spectroscopy

Kartio, I.; Laajalehto, K.; Kaurila, T.; Suoninen, E.

doi:10.1016/0169-4332(95)00321-5

Cited by 34 publications

(23 citation statements)

References 28 publications

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“…Kartio et al [4] used X-Ray Photoelectron Spectroscopy (XPS) to characterize the mineral surface from flotation tests. The XPS spectra reported showed chemisorption of xanthate ions on chalcopyrite Minerals 2020, 10, 426 2 of 18 surface with no evidence of dixanthogen being formed on the pyrite surface.…”

Section: Introductionmentioning

confidence: 99%

A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

Zhang

2020

Minerals

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A multi-scale investigation was conducted to study the surface properties of xanthate-absorbed chalcopyrite at elevated temperature to understand the temperature effect on the xanthate’s performance during chalcopyrite flotation. Firstly, a macro-scale study was initiated to investigate the temperature effect on the hydrophobicity of mineral surface by means of contact angle measurement, Hallimond tube microflotation and lab flotation tests; secondly, a micro–scale study was conducted to clarify the temperature effect on the adsorption of chemicals on mineral surface employing an atomic force microscope (AFM) and Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR). In the experiments, pure chalcopyrite samples were used for contact angle measurement, Hallimond tube microflotation, AFM and FTIR; and copper ore samples (1.51% Cu, 5.88% Fe 0.029% Mo, 5.23% S in weight percentage) were used for lab flotation tests. FTIR spectra and AFM images showed that, when potassium amyl xanthate (PAX) was used as the collector in this study, oily dixanthogen was the main hydrophobic species on the chalcopyrite surface. The morphological change of dixanthogen patches at elevated temperatures has a more significant impact than changes in the amount of adsorption species. Increasing temperature within a certain range is beneficial for the collector’s performance by increasing flotation recovery.

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Section: Introductionmentioning

confidence: 99%

A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

Zhang

2020

Minerals

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“…Amongst IV-VI semiconductors, PbS has been extensively studied by theoretical and applied physicists, 18,19 because of its unique physical properties and potential for application in many optoelectronic devices. 20,21 Lead sulfide (PbS) is a compound semiconductor with a large Bohr exciton radius of 18 nm and narrow band gap of ca.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of PbS nanoparticles and the deposition of thin films by Aerosol-Assisted Chemical Vapour Deposition (AACVD)

et al. 2010

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“…13 On the other hand, a very small broadening was found for the Pb 4f core-level spectrum under the same conditions, suggesting that the initial oxidation is rather slow and appears largely on the lead atom sites. 13 In our AFM measurements, the PbS(100) surface was in air for no longer than 35 min. The aim was to consider those regions of the specimen that were not affected by oxygen.…”

Section: Resultsmentioning

confidence: 90%

“…The sample purity was checked with Link AN 10 000 EDX equipment and it was found that if impurities were present they were <1.0-0.5 wt.%. Indeed, previously it was shown using x-ray fluorescence measurements 6 that there should be ¾1300 ppm silicon, 700 ppm copper, 100 ppm cobalt, 100 ppm antimony, 80 ppm nickel, 60 ppm chromium and 40 ppm zinc.…”

Section: Methodsmentioning

confidence: 97%

Surface core‐level shift and AFM study of the galena (100) surface

Leiro

Laajalehto

Peltoniemi

et al. 2002

Surface & Interface Analysis

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The core-level S 2p and Pb 5d spectra of galena (natural PbS) single crystals have been investigated using synchrotron radiation. Comparison between a synthetic PbS and a mineral galena has been made and the former gave broader S 2p lines than the latter. In both samples a strong broadening of the line was observed when the temperature was increased. Also, the surface core-level shift (SCLS) was slightly smaller for the synthetic sample. No shift was found for the Pb 5d lines. The atomic force microscopy (AFM) study of the mineral (100) surface showed that only one type of atom (most likely sulphur) is visible, in agreement with Heinzelmann et al.

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A study of galena (PbS) surfaces under controlled potential in pH 4.6 solution by synchrotron radiation excited photoelectron spectroscopy

Cited by 34 publications

References 28 publications

A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

A Study of Temperature Effect on the Xanthate’s Performance during Chalcopyrite Flotation

Controlled synthesis of PbS nanoparticles and the deposition of thin films by Aerosol-Assisted Chemical Vapour Deposition (AACVD)

Surface core‐level shift and AFM study of the galena (100) surface

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