Surface activation and induced change of physicochemical and process properties of galena by nanosecond electromagnetic pulses

Chanturia, V. A.; Bunin, I. Zh.; Ryazantseva, M. V.; Khabarova, I. A.; Копорулина, Е. В.; Anashkina, N. E.

doi:10.1134/s1062739114030181

Cited by 20 publications

(1 citation statement)

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“…A single and symmetric Pb 4f 7/2 and Pb 4f 5/2 doublet appeared in the Pb 4f spectrum, and the property of the Pb 4f 5/2 and Pb 4f 7/2 peaks was identical (see Figure 5a). The Pb 4f 7/2 XPS peak at a binding energy of 138.81 eV was assigned to PbCO 3 [26,29,30]. Combined with the data in Table 3, the binding energy of Pb 4f 7/2 XPS peak had a shift of 0.14 eV after cerussite was pretreated with chloride ions.…”

Section: Xps Studiesmentioning

confidence: 78%

The Effect of Chloride Ions on the Activity of Cerussite Surfaces

et al. 2016

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Chloride ions were found to potentially increase activity of cerussite surfaces. Dissolution experiments, zeta potential measurements, X-ray photoelectron spectroscopy (XPS) studies, and density functional theory (DFT) computation were conducted in this study. Dissolution experiments showed that the lead ion concentrations in the NaCl solution system were lower than those in the deionized water system and that the lead ion concentrations in NaCl + Na 2 S aqueous systems decreased by approximately one order of magnitude compared with that in the Na 2 S system alone. Results of zeta potential measurements revealed that the pretreatment with chloride ions of cerussite caused a more positive zeta potential than that without chloride ions. XPS analysis results indicated that the number of lead ions on the mineral surface increased after cerussite was treated with chloride ions. Results of DFT computation implied that the number of lead atoms on the mineral surface increased and that the activity improved after PbCl + was adsorbed onto the cerussite surface. The contribution of chloride ions to the activity on the mineral surface is attributed to the increase in the number of active sites and enhancement in the activity of these sites, resulting in improved sulfidization and flotation performance.

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Section: Xps Studiesmentioning

confidence: 78%